#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
#define MD (1000000007U)
void *wmem;
char memarr[96000000];
template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){
  static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  (*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );
  (*arr)=(T*)(*mem);
  (*mem)=((*arr)+x);
}
template<class T1> void sortA_L(int N, T1 a[], void *mem = wmem){
  sort(a, a+N);
}
template<class T1, class T2> void sortA_L(int N, T1 a[], T2 b[], void *mem = wmem){
  int i;
  pair<T1, T2> *arr;
  walloc1d(&arr, N, &mem);
  for(i=(0);i<(N);i++){
    arr[i].first = a[i];
    arr[i].second = b[i];
  }
  sort(arr, arr+N);
  for(i=(0);i<(N);i++){
    a[i] = arr[i].first;
    b[i] = arr[i].second;
  }
}
struct Modint{
  unsigned val;
  Modint(){
    val=0;
  }
  Modint(int a){
    val = ord(a);
  }
  Modint(unsigned a){
    val = ord(a);
  }
  Modint(long long a){
    val = ord(a);
  }
  Modint(unsigned long long a){
    val = ord(a);
  }
  inline unsigned ord(unsigned a){
    return a%MD;
  }
  inline unsigned ord(int a){
    a %= (int)MD;
    if(a < 0){
      a += MD;
    }
    return a;
  }
  inline unsigned ord(unsigned long long a){
    return a%MD;
  }
  inline unsigned ord(long long a){
    a %= (int)MD;
    if(a < 0){
      a += MD;
    }
    return a;
  }
  inline unsigned get(){
    return val;
  }
  inline Modint &operator+=(Modint a){
    val += a.val;
    if(val >= MD){
      val -= MD;
    }
    return *this;
  }
  inline Modint &operator-=(Modint a){
    if(val < a.val){
      val = val + MD - a.val;
    }
    else{
      val -= a.val;
    }
    return *this;
  }
  inline Modint &operator*=(Modint a){
    val = ((unsigned long long)val*a.val)%MD;
    return *this;
  }
  inline Modint &operator/=(Modint a){
    return *this *= a.inverse();
  }
  inline Modint operator+(Modint a){
    return Modint(*this)+=a;
  }
  inline Modint operator-(Modint a){
    return Modint(*this)-=a;
  }
  inline Modint operator*(Modint a){
    return Modint(*this)*=a;
  }
  inline Modint operator/(Modint a){
    return Modint(*this)/=a;
  }
  inline Modint operator+(int a){
    return Modint(*this)+=Modint(a);
  }
  inline Modint operator-(int a){
    return Modint(*this)-=Modint(a);
  }
  inline Modint operator*(int a){
    return Modint(*this)*=Modint(a);
  }
  inline Modint operator/(int a){
    return Modint(*this)/=Modint(a);
  }
  inline Modint operator+(long long a){
    return Modint(*this)+=Modint(a);
  }
  inline Modint operator-(long long a){
    return Modint(*this)-=Modint(a);
  }
  inline Modint operator*(long long a){
    return Modint(*this)*=Modint(a);
  }
  inline Modint operator/(long long a){
    return Modint(*this)/=Modint(a);
  }
  inline Modint operator-(void){
    Modint res;
    if(val){
      res.val=MD-val;
    }
    else{
      res.val=0;
    }
    return res;
  }
  inline operator bool(void){
    return val!=0;
  }
  inline operator int(void){
    return get();
  }
  inline operator long long(void){
    return get();
  }
  inline Modint inverse(){
    int a = val;
    int b = MD;
    int u = 1;
    int v = 0;
    int t;
    Modint res;
    while(b){
      t = a / b;
      a -= t * b;
      swap(a, b);
      u -= t * v;
      swap(u, v);
    }
    if(u < 0){
      u += MD;
    }
    res.val = u;
    return res;
  }
  inline Modint pw(unsigned long long b){
    Modint a(*this);
    Modint res;
    res.val = 1;
    while(b){
      if(b&1){
        res *= a;
      }
      b >>= 1;
      a *= a;
    }
    return res;
  }
  inline bool operator==(int a){
    return ord(a)==val;
  }
  inline bool operator!=(int a){
    return ord(a)!=val;
  }
}
;
inline Modint operator+(int a, Modint b){
  return Modint(a)+=b;
}
inline Modint operator-(int a, Modint b){
  return Modint(a)-=b;
}
inline Modint operator*(int a, Modint b){
  return Modint(a)*=b;
}
inline Modint operator/(int a, Modint b){
  return Modint(a)/=b;
}
inline Modint operator+(long long a, Modint b){
  return Modint(a)+=b;
}
inline Modint operator-(long long a, Modint b){
  return Modint(a)-=b;
}
inline Modint operator*(long long a, Modint b){
  return Modint(a)*=b;
}
inline Modint operator/(long long a, Modint b){
  return Modint(a)/=b;
}
inline int my_getchar_unlocked(){
  static char buf[1048576];
  static int s = 1048576;
  static int e = 1048576;
  if(s == e && e == 1048576){
    e = fread_unlocked(buf, 1, 1048576, stdin);
    s = 0;
  }
  if(s == e){
    return EOF;
  }
  return buf[s++];
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
struct MY_WRITER{
  char buf[1048576];
  int s;
  int e;
  MY_WRITER(){
    s = 0;
    e = 1048576;
  }
  ~MY_WRITER(){
    if(s){
      fwrite_unlocked(buf, 1, s, stdout);
    }
  }
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar_unlocked(int a){
  if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
    fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
    MY_WRITER_VAR.s = 0;
  }
  MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
  my_putchar_unlocked(a);
}
inline void wt_L(int x){
  int s=0;
  int m=0;
  char f[10];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    my_putchar_unlocked('-');
  }
  while(s--){
    my_putchar_unlocked(f[s]+'0');
  }
}
inline void wt_L(Modint x){
  int i;
  i = (int)x;
  wt_L(i);
}
template<class T, class S> inline T pow_L(T a, S b){
  T res = 1;
  res = 1;
  for(;;){
    if(b&1){
      res *= a;
    }
    b >>= 1;
    if(b==0){
      break;
    }
    a *= a;
  }
  return res;
}
inline double pow_L(double a, double b){
  return pow(a,b);
}
template<class S> inline void arrInsert(const int k, int &sz, S a[], const S aval){
  int i;
  sz++;
  for(i=sz-1;i>k;i--){
    a[i] = a[i-1];
  }
  a[k] = aval;
}
template<class S, class T> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval){
  int i;
  sz++;
  for(i=sz-1;i>k;i--){
    a[i] = a[i-1];
  }
  for(i=sz-1;i>k;i--){
    b[i] = b[i-1];
  }
  a[k] = aval;
  b[k] = bval;
}
template<class S, class T, class U> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval, U c[], const U cval){
  int i;
  sz++;
  for(i=sz-1;i>k;i--){
    a[i] = a[i-1];
  }
  for(i=sz-1;i>k;i--){
    b[i] = b[i-1];
  }
  for(i=sz-1;i>k;i--){
    c[i] = c[i-1];
  }
  a[k] = aval;
  b[k] = bval;
  c[k] = cval;
}
template<class S, class T, class U, class V> inline void arrInsert(const int k, int &sz, S a[], const S aval, T b[], const T bval, U c[], const U cval, V d[], const V dval){
  int i;
  sz++;
  for(i=sz-1;i>k;i--){
    a[i] = a[i-1];
  }
  for(i=sz-1;i>k;i--){
    b[i] = b[i-1];
  }
  for(i=sz-1;i>k;i--){
    c[i] = c[i-1];
  }
  for(i=sz-1;i>k;i--){
    d[i] = d[i-1];
  }
  a[k] = aval;
  b[k] = bval;
  c[k] = cval;
  d[k] = dval;
}
struct unionFind{
  int *d;
  int N;
  int M;
  inline void malloc(const int n){
    d = (int*)std::malloc(n*sizeof(int));
    M = n;
  }
  inline void malloc(const int n, const int fg){
    d = (int*)std::malloc(n*sizeof(int));
    M = n;
    if(fg){
      init(n);
    }
  }
  inline void free(void){
    std::free(d);
  }
  inline void walloc(const int n, void **mem=&wmem){
    walloc1d(&d, n, mem);
    M = n;
  }
  inline void walloc(const int n, const int fg, void **mem=&wmem){
    walloc1d(&d, n, mem);
    M = n;
    if(fg){
      init(n);
    }
  }
  inline void init(const int n){
    int i;
    N = n;
    for(i=(0);i<(n);i++){
      d[i] = -1;
    }
  }
  inline void init(void){
    init(M);
  }
  inline int get(int a){
    int t = a;
    int k;
    while(d[t]>=0){
      t=d[t];
    }
    while(d[a]>=0){
      k=d[a];
      d[a]=t;
      a=k;
    }
    return a;
  }
  inline int connect(int a, int b){
    if(d[a]>=0){
      a=get(a);
    }
    if(d[b]>=0){
      b=get(b);
    }
    if(a==b){
      return 0;
    }
    if(d[a] < d[b]){
      d[a] += d[b];
      d[b] = a;
    }
    else{
      d[b] += d[a];
      d[a] = b;
    }
    return 1;
  }
  inline int operator()(int a){
    return get(a);
  }
  inline int operator()(int a, int b){
    return connect(a,b);
  }
  inline int& operator[](const int a){
    return d[a];
  }
  inline int size(int a){
    a = get(a);
    return -d[a];
  }
  inline int sizeList(int res[]){
    int i;
    int sz=0;
    for(i=(0);i<(N);i++){
      if(d[i]<0){
        res[sz++] = -d[i];
      }
    }
    return sz;
  }
}
;
int N;
int M;
int L[200000];
int R[200000];
int P[200000];
int sm[200000+1];
int ps;
int zs;
int ind[200000];
set<int> zero;
set<int> pos;
int n;
int m;
int l[200000+1];
int r[200000+1];
int p[200000];
Modint add[200000+1];
Modint dc[200000+1];
Modint solve1(void){
  int i;
  int j;
  int k;
  Modint res;
  sortA_L(m, l, r);
  k = 0;
  for(i=(0);i<(m);i++){
    if(k && l[k-1] == l[i]){
      continue;
    }
    while(k && r[k-1] >= r[i]){
      k--;
    }
    arrInsert(k, k, l, l[i], r, r[i]);
  }
  m = k;
  l[m] = n;
  if(m==0){
    return (pow_L((Modint(3)),n));
  }
  res = 0;
  add[l[0]] =(pow_L(Modint(3),l[0]));
  j = k = 0;
  for(i=(l[0]);i<(n);i++){
    res = 2 * res + add[i] - dc[i];
    while(l[j] == i){
      dc[r[j]+1] += add[l[j]] * ((pow_L(Modint(2),(r[j]-l[j]+1))));
      j++;
    }
    while(l[k] <= i){
      k++;
    }
    add[l[k]] += res * ((pow_L(Modint(3),(l[k] - i - 1))));
  }
  return add[n];
}
Modint solve2(void){
  int i;
  int cond = 0;
  unionFind uf;
  uf.walloc(2*n+2, 1);
  for(i=(0);i<(m);i++){
    if(p[i]==0){
      cond += uf(l[i], r[i]+1);
      cond += uf(l[i]+n+1, r[i]+1+n+1);
    }
    else{
      cond += uf(l[i], r[i]+1+n+1);
      cond += uf(l[i]+n+1, r[i]+1);
    }
  }
  for(i=(0);i<(n+1);i++){
    if(uf(i)==uf(i+n+1)){
      return 0;
    }
  }
  return (pow_L((Modint(2)),(n - cond/2)));
}
int main(){
  int i;
  wmem = memarr;
  Modint res;
  rd(N);
  rd(M);
  {
    int hCmBdyQB;
    for(hCmBdyQB=(0);hCmBdyQB<(M);hCmBdyQB++){
      rd(L[hCmBdyQB]);L[hCmBdyQB] += (-1);
      rd(R[hCmBdyQB]);R[hCmBdyQB] += (-1);
      rd(P[hCmBdyQB]);
    }
  }
  for(i=(0);i<(M);i++){
    if(P[i]){
      sm[L[i]]++;
      sm[R[i]+1]--;
    }
  }
  for(i=(1);i<(N+1);i++){
    sm[i] += sm[i-1];
  }
  for(i=(0);i<(N);i++){
    if(sm[i]==0){
      zero.insert(i);
      ind[i] = zs++;
    }
    else{
      pos.insert(i);
      ind[i] = ps++;
    }
  }
  for(i=(0);i<(M);i++){
    if(P[i] == 0){
      set<int>::iterator it1;
      set<int>::iterator it2;
      it1 = zero.lower_bound(L[i]);
      it2 = zero.upper_bound(R[i]);
      if(it1 == it2){
        wt_L(0);
        wt_L('\n');
        return 0;
      }
      l[m] = ind[*it1];
      if(it2==zero.end()){
        r[m] =zs-1;
      }
      else{
        r[m] =ind[*it2]-1;
      }
      m++;
    }
  }
  n = zs;
  res = solve1();
  n = ps;
  m = 0;
  for(i=(0);i<(M);i++){
    if(P[i]){
      set<int>::iterator it1;
      set<int>::iterator it2;
      it1 = pos.lower_bound(L[i]);
      it2 = pos.upper_bound(R[i]);
      if(it1 == it2){
        wt_L(0);
        wt_L('\n');
        return 0;
      }
      l[m] = ind[*it1];
      if(it2==pos.end()){
        r[m] =ps-1;
      }
      else{
        r[m] =ind[*it2]-1;
      }
      if(P[i]==-1){
        p[m] =1;
      }
      else{
        p[m] =0;
      }
      m++;
    }
  }
  res *= solve2();
  wt_L(res);
  wt_L('\n');
  return 0;
}
// cLay varsion 20200813-1 [beta]

// --- original code ---
// int N, M, L[2d5], R[2d5], P[2d5];
// 
// int sm[2d5+1];
// int ps, zs, ind[2d5];
// set<int> zero, pos;
// 
// int n, m, l[2d5+1], r[2d5+1], p[2d5];
// Modint add[2d5+1], dc[2d5+1];
// 
// Modint solve1(void){
//   int i, j, k;
//   Modint res;
//   sortA(m, l, r);
// 
//   k = 0;
//   rep(i,m){
//     if(k && l[k-1] == l[i]) continue;
//     while(k && r[k-1] >= r[i]) k--;
//     arrInsert(k, k, l, l[i], r, r[i]);
//   }
//   m = k;
//   l[m] = n;
// 
//   if(m==0) return (Modint(3)) ** n;
// 
//   res = 0;
//   add[l[0]] = Modint(3) ** l[0];
//   j = k = 0;
//   rep(i,l[0],n){
//     res = 2 * res + add[i] - dc[i];
//     while(l[j] == i) dc[r[j]+1] += add[l[j]] * (Modint(2) ** (r[j]-l[j]+1)), j++;
//     while(l[k] <= i) k++;
//     add[l[k]] += res * (Modint(3) ** (l[k] - i - 1));
//   }
//   return add[n];
// }
// 
// Modint solve2(void){
//   int cond = 0;
//   unionFind uf;
//   uf.walloc(2*n+2, 1);
//   
//   rep(i,m){
//     if(p[i]==0){
//       cond += uf(l[i], r[i]+1);
//       cond += uf(l[i]+n+1, r[i]+1+n+1);
//     } else {
//       cond += uf(l[i], r[i]+1+n+1);
//       cond += uf(l[i]+n+1, r[i]+1);
//     }
//   }
// 
//   rep(i,n+1) if(uf(i)==uf(i+n+1)) return 0;
//   return (Modint(2)) ** (n - cond/2);
// }
// 
// {
//   Modint res;
//   rd(N,M,(L--,R--,P)(M));
// 
//   rep(i,M) if(P[i]){
//     sm[L[i]]++;
//     sm[R[i]+1]--;
//   }
//   rep(i,1,N+1) sm[i] += sm[i-1];
// 
//   rep(i,N){
//     if(sm[i]==0){
//       zero.insert(i);
//       ind[i] = zs++;
//     } else {
//       pos.insert(i);
//       ind[i] = ps++;
//     }
//   }
// 
//   rep(i,M) if(P[i] == 0){
//     set<int>::iterator it1, it2;
//     it1 = zero.lower_bound(L[i]);
//     it2 = zero.upper_bound(R[i]);
//     if(it1 == it2) wt(0), return 0;
//     l[m] = ind[*it1];
//     r[m] = if[it2==zero.end(), zs-1, ind[*it2]-1];
//     m++;
//   }
//   n = zs;
//   res = solve1();
// 
//   n = ps;
//   m = 0;
//   rep(i,M) if(P[i]){
//     set<int>::iterator it1, it2;
//     it1 = pos.lower_bound(L[i]);
//     it2 = pos.upper_bound(R[i]);
//     if(it1 == it2) wt(0), return 0;
//     l[m] = ind[*it1];
//     r[m] = if[it2==pos.end(), ps-1, ind[*it2]-1];
//     p[m] = if[P[i]==-1, 1, 0];
//     m++;
//   }
//   res *= solve2();
// 
//   wt(res);
// }