#include<bits/stdc++.h>
using namespace std;

#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

#define mygc(c) (c)=getchar_unlocked()
#define mypc(c) putchar_unlocked(c)

#define ll long long
#define ull unsigned ll

void reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
void reader(ll *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
int reader(char c[]){int i,s=0;for(;;){mygc(i);if(i!=' '&&i!='\n'&&i!='\r'&&i!='\t'&&i!=EOF) break;}c[s++]=i;for(;;){mygc(i);if(i==' '||i=='\n'||i=='\r'||i=='\t'||i==EOF) break;c[s++]=i;}c[s]='\0';return s;}
template <class T, class S> void reader(T *x, S *y){reader(x);reader(y);}
template <class T, class S, class U> void reader(T *x, S *y, U *z){reader(x);reader(y);reader(z);}
template <class T, class S, class U, class V> void reader(T *x, S *y, U *z, V *w){reader(x);reader(y);reader(z);reader(w);}

void writer(int x, char c){int s=0,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)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(ll x, char c){int s=0,m=0;char f[20];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(const char c[]){int i;for(i=0;c[i]!='\0';i++)mypc(c[i]);}
void writer(const char x[], char c){int i;for(i=0;x[i]!='\0';i++)mypc(x[i]);mypc(c);}
template<class T> void writerLn(T x){writer(x,'\n');}
template<class T, class S> void writerLn(T x, S y){writer(x,' ');writer(y,'\n');}
template<class T, class S, class U> void writerLn(T x, S y, U z){writer(x,' ');writer(y,' ');writer(z,'\n');}
template<class T> void writerArr(T x[], int n){int i;if(!n){mypc('\n');return;}rep(i,n-1)writer(x[i],' ');writer(x[n-1],'\n');}

#define MD 1000000007

#define ll long long

#define BIG_INT_SIZE 100
#define BIG_INT_BASE 100000000LL
#define BIG_INT_DIGITS 8
#define BIG_INT_CHAR_SIZE 1000 /* BIG_INT_SIZE*BIG_INT_DIGITS+2以上 */

typedef struct big_integer{ll a[BIG_INT_SIZE];}bigInt;

int bigIntSign(bigInt a);
int bigIntToChar(bigInt a,char ret[]);
void printBigInt(bigInt a);
void putBigInt(bigInt a);


bigInt bigIntZero(){
  bigInt a; int i;
  rep(i,BIG_INT_SIZE) a.a[i]=0;
  return a;
}

bigInt bigIntOne(){
  bigInt a; int i;
  REP(i,1,BIG_INT_SIZE) a.a[i]=0; a.a[0]=1;
  return a;
}

bigInt bigIntOrder(bigInt a){
  int i; ll k;
  REP(i,1,BIG_INT_SIZE) if(a.a[i-1]<0 || a.a[i-1]>=BIG_INT_BASE){
    k=a.a[i-1]/BIG_INT_BASE; a.a[i-1]-=k*BIG_INT_BASE;
    if(a.a[i-1]<0) k--, a.a[i-1]+=BIG_INT_BASE; a.a[i]+=k;
  }
  if(a.a[BIG_INT_SIZE-1]<0){
    rep(i,BIG_INT_SIZE) a.a[i]=-a.a[i]; a=bigIntOrder(a);
    rep(i,BIG_INT_SIZE) a.a[i]=-a.a[i];
  }
  return a;
}

bigInt llToBigInt(ll a){
  bigInt c; int i;
  REP(i,1,BIG_INT_SIZE) c.a[i]=0; c.a[0]=a;
  return bigIntOrder(c);
}

int bigIntGreaterThan(bigInt a,bigInt b){
  int i;
  for(i=BIG_INT_SIZE-1;i>=0;i--){
    if(a.a[i]>b.a[i]) return 1;
    if(a.a[i]<b.a[i]) return 0;
  }
  return 0;
}

int bigIntIsZero(bigInt a){
  int i; rep(i,BIG_INT_SIZE) if(a.a[i]) return 0; return 1;
}

bigInt bigIntPlus(bigInt a,bigInt b){
  int i; bigInt c;
  rep(i,BIG_INT_SIZE) c.a[i]=a.a[i]+b.a[i];
  return bigIntOrder(c);
}

bigInt bigIntMinus(bigInt a,bigInt b){
  int i; bigInt c;
  rep(i,BIG_INT_SIZE) c.a[i]=a.a[i]-b.a[i];
  return bigIntOrder(c);
}

bigInt bigIntMultipleLL(bigInt a,ll b){
  int i; rep(i,BIG_INT_SIZE) a.a[i]*=b;
  return bigIntOrder(a);
}

bigInt bigIntPlusSimple(bigInt a,bigInt b){
  int i; bigInt c;
  rep(i,BIG_INT_SIZE) c.a[i]=a.a[i]+b.a[i];
  return c;
}

bigInt bigIntMinusSimple(bigInt a,bigInt b){
  int i; bigInt c;
  rep(i,BIG_INT_SIZE) c.a[i]=a.a[i]-b.a[i];
  return c;
}

bigInt bigIntMultipleLLSimple(bigInt a,ll b){
  int i; rep(i,BIG_INT_SIZE) a.a[i]*=b;
  return a;
}

bigInt bigIntMultiple(bigInt a,bigInt b){
  int i,j,ii,jj; bigInt c;
  for(ii=BIG_INT_SIZE-1;ii;ii--) if(a.a[ii]) break; ii++;
  if(ii==1) return bigIntMultipleLL(b,a.a[0]);
  for(jj=BIG_INT_SIZE-1;jj;jj--) if(b.a[jj]) break; jj++;
  if(jj==1) return bigIntMultipleLL(a,b.a[0]);
  rep(i,BIG_INT_SIZE) c.a[i]=0;
  rep(i,ii)if(a.a[i])for(j=0;j<jj&&i+j+1<BIG_INT_SIZE;j++) c.a[i+j]+=a.a[i]*b.a[j];
  return bigIntOrder(c);
}

void bigIntDivisionsLL(bigInt a,ll b,bigInt *c,ll *d){
  int i;
  rep(i,BIG_INT_SIZE) c->a[i]=a.a[i];
  for(i=BIG_INT_SIZE-1;i;i--)
    c->a[i-1]+=(c->a[i]%b)*BIG_INT_BASE, c->a[i]/=b;
  *d = c->a[0]%b; c->a[0]/=b;
}

/* c=a/b, d=a%b */
void bigIntDivisions(bigInt a,bigInt b,bigInt *c,bigInt *d){
  int i,j,s,sa,sb; ll ma,mb,mc; bigInt tmp;
  sa=bigIntSign(a); sb=bigIntSign(b);
  if(sa==-1) a=bigIntMultipleLL(a,-1);
  if(sb==-1) b=bigIntMultipleLL(b,-1);
  
  for(j=BIG_INT_SIZE-1;j;j--) if(b.a[j]) break;
  if(!j){
    REP(i,1,BIG_INT_SIZE) d->a[i]=0;
    bigIntDivisionsLL(a,b.a[0],c,&(d->a[0]));
  }else{
    for(i=BIG_INT_SIZE-1;i;i--) if(a.a[i]) break;
    s=i-j; if(s<0) s=0;
    rep(i,BIG_INT_SIZE) c->a[i]=0;
    while(s>=0){
      ma=0; mb=BIG_INT_BASE-1;
      while(ma!=mb){
        mc = (ma+mb)/2 + (ma+mb)%2;
        c->a[s]=mc; tmp=bigIntMultiple(*c,b);
        if(bigIntGreaterThan(tmp,a)) mb=mc-1; else ma=mc;
      }
      c->a[s]=ma; s--;
    }
    tmp = bigIntMultiple(b,*c);
    *d = bigIntMinus(a,tmp);
  }

  if(sa==-1 && sb==-1){
    *d=bigIntMultipleLL(*d,-1);
  } else if(sa==-1 && sb!=-1){
    *c=bigIntMultipleLL(*c,-1);
    *d=bigIntMultipleLL(*d,-1);
  } else if(sa!=-1 && sb==-1){
    *c=bigIntMultipleLL(*c,-1);
  }
}

bigInt bigIntDivision(bigInt a,bigInt b){
  bigInt c,d;
  bigIntDivisions(a,b,&c,&d);
  return c;
}

bigInt bigIntModular(bigInt a,bigInt b){
  bigInt c,d;
  bigIntDivisions(a,b,&c,&d);
  return d;
}

int bigIntSign(bigInt a){
  int i;
  for(i=BIG_INT_SIZE-1;i>=0;i--) if(a.a[i]){
    if(a.a[i]<0) return -1; else return 1;
  }
  return 0;
}

bigInt bigIntAbs(bigInt a){
  if(bigIntSign(a)==-1) return bigIntMultipleLL(a,-1LL); return a;
}

bigInt bigIntGCD(bigInt a,bigInt b){
  if(bigIntSign(a)==-1) a=bigIntMultipleLL(a,-1);
  if(bigIntSign(b)==-1) b=bigIntMultipleLL(b,-1);
  if(bigIntIsZero(a)) return b;
  return bigIntGCD(bigIntModular(b,a),a);
}

int bigIntToChar(bigInt a,char ret[]){
  int i,j,s=0,len=0; char ct[BIG_INT_CHAR_SIZE]; ll lt;
  if(bigIntSign(a)==-1){
    ret[0]='-'; len=bigIntToChar(bigIntMultipleLL(a,-1LL),ret+1); return len+1;
  }
  rep(i,BIG_INT_SIZE){
    lt=a.a[i]; rep(j,BIG_INT_DIGITS) ct[s++]=lt%10, lt/=10;
  }
  j=0;
  while(s--){
    if(ct[s]) j=1;
    if(j) ret[len++]=ct[s]+'0';
  }
  if(!len) ret[len++]='0';
  ret[len]='\0'; return len;
}

void printBigInt(bigInt a){
  int i,k; char tmp[BIG_INT_CHAR_SIZE];
  k=bigIntToChar(a,tmp); rep(i,k) putchar(tmp[i]);
}

void putBigInt(bigInt a){
  char tmp[BIG_INT_CHAR_SIZE];
  bigIntToChar(a,tmp); puts(tmp);
}

bigInt bigIntDivisionLL(bigInt a,ll b){
  bigInt res; ll tmp;
  bigIntDivisionsLL(a, b, &res, &tmp);
  return res;
}

bigInt bigIntSqrt(bigInt a){
  bigInt c1=bigIntZero(),c2=a,c,mul;

  while( bigIntGreaterThan(c2,c1) ){
    c = bigIntDivisionLL( bigIntPlus(bigIntPlus(c1,c2),bigIntOne()), 2);
    mul = bigIntMultiple(c,c);
    if( bigIntGreaterThan(mul,a) ) c2=bigIntMinus(c,bigIntOne()); else c1=c;
  }

  return c1;
}

bigInt bigIntCubicRoot(bigInt a){
  bigInt c1=bigIntZero(),c2=a,c,mul;

  while( bigIntGreaterThan(c2,c1) ){
    c = bigIntDivisionLL( bigIntPlus(bigIntPlus(c1,c2),bigIntOne()), 2);
    mul = bigIntMultiple(c,bigIntMultiple(c,c));
    if( bigIntGreaterThan(mul,a) ) c2=bigIntMinus(c,bigIntOne()); else c1=c;
  }

  return c1;
}


template<class T> T GCD(T a,T b){T r; while(a){r=b; b=a; a=r%a;} return b;}
template<class T> T LCM(T a,T b){return a/GCD(a,b)*b;}

int N, K, A[1000], v[1000];
int fact[1000];

int main(){
  int i, j, k, p, m;
  bigInt res = bigIntOne();

  reader(&N, &K);
  rep(i,N) A[i] = i;
  while(K--){
    reader(&i,&j); i--, j--;
    swap(A[i],A[j]);

  }
  rep(i,N) if(!v[i]){
    k = 0;
    j = i;
    while(!v[j]){
      v[j]=1;
      k++;
      j=A[j];
    }

    for(p=2;p*p<=k;p++) if(k%p==0){
      m = 0;
      while(k%p==0) m++, k/=p;
      fact[p] = max(fact[p], m);
    }
    if(k>1) fact[k] = max(fact[k],1);
  }
  rep(i,1000) while(fact[i]>0) fact[i]--, res = bigIntMultipleLL(res, i);

  putBigInt(res);

  return 0;
}