結果
| 問題 | No.1596 Distance Sum in 2D Plane | 
| コンテスト | |
| ユーザー |  | 
| 提出日時 | 2021-07-09 22:43:18 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 207 ms / 2,000 ms | 
| コード長 | 5,182 bytes | 
| コンパイル時間 | 1,893 ms | 
| コンパイル使用メモリ | 198,776 KB | 
| 最終ジャッジ日時 | 2025-01-22 22:21:10 | 
| ジャッジサーバーID (参考情報) | judge2 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| sample | AC * 3 | 
| other | AC * 17 | 
ソースコード
#line 1 "/workspaces/compro/lib/math/modint.hpp"
#include <cassert>
#include <cstdint>
#include <iostream>
#include <vector>
#ifndef MOD_INT
#define MOD_INT
template <std::uint_fast64_t MOD> class ModInt {
  using u64 = std::uint_fast64_t;
public:
  ModInt(const u64 val = 0) { value = (val + MOD) % MOD; }
  ModInt operator+(const ModInt rhs) const { return ModInt(*this) += rhs; }
  ModInt operator-(const ModInt rhs) const { return ModInt(*this) -= rhs; }
  ModInt operator*(const ModInt rhs) const { return ModInt(*this) *= rhs; }
  ModInt operator/(const ModInt rhs) const { return ModInt(*this) /= rhs; }
  ModInt &operator+=(const ModInt rhs) {
    value += rhs.value;
    if (value >= MOD) {
      value -= MOD;
    }
    return *this;
  }
  ModInt &operator-=(const ModInt rhs) {
    if (value < rhs.value) {
      value += MOD;
    }
    value -= rhs.value;
    return *this;
  }
  ModInt &operator*=(const ModInt rhs) {
    value = value * rhs.value % MOD;
    return *this;
  }
  ModInt &operator/=(ModInt rhs) {
    *this *= rhs.inv();
    return *this;
  }
  ModInt &operator++(int n) {
    value++;
    if (value >= MOD) {
      value -= MOD;
    }
    return *this;
  }
  ModInt &operator--(int n) {
    if (value == 0) {
      value += MOD;
    }
    value--;
    return *this;
  }
  ModInt inv() { return ModInt::pow(*this, MOD - 2); }
  static ModInt pow(ModInt base, long long int n) {
    ModInt res = ModInt(1);
    while (n) {
      if (n & 1) {
        res *= base;
      }
      base *= base;
      n /= 2;
    }
    return res;
  }
  static ModInt comb(ModInt n, ModInt r) { return comb(n.value, r.value); }
  static ModInt comb(int n, int r) {
    if (n < r)
      return ModInt(0);
    ModInt res = ModInt(1);
    for (int i = 0; i < r; i++) {
      res *= ModInt(n - i);
    }
    ModInt inv = ModInt(1);
    for (int i = 0; i < r; i++) {
      inv *= ModInt(r - i);
    }
    return res / inv;
  }
  // nC0からnCnまでを計算する。計算量はO(n)
  // @param n     要素数
  // @param vec   結果を格納する配列
  static void combination_table(int n, std::vector<ModInt> &vec) {
    assert(static_cast<int>(vec.size()) >= n + 1);
    vec[0] = ModInt(1);
    for (int r = 1; r < n + 1; r++) {
      vec[r] = vec[r - 1] * ModInt(n - r + 1) / ModInt(r);
    }
  }
  // n!までを計算する
  // @param n     要素数
  // @param vec   結果を格納する配列
  static void factorial_table(int n, std::vector<ModInt> &vec) {
    assert(static_cast<int>(vec.size()) >= n + 1);
    vec[0] = ModInt(1);
    for (int r = 1; r <= n; r++) {
      vec[r] = vec[r - 1] * ModInt(r);
    }
  }
  u64 getValue() const { return value; }
private:
  u64 value;
  friend std::ostream &operator<<(std::ostream &out, const ModInt<MOD> &m) {
    out << m.value;
    return out;
  }
  friend std::istream &operator>>(std::istream &in, ModInt &m) {
    uint_fast64_t i;
    in >> i;
    m = ModInt(i);
    return in;
  }
};
#endif
#line 1 "/workspaces/compro/lib/template.hpp"
#line 3 "/workspaces/compro/lib/io/vector.hpp"
#ifndef IO_VECTOR
#define IO_VECTOR
template <class T> std::ostream &operator<<(std::ostream &out, const std::vector<T> &v) {
  int size = v.size();
  for (int i = 0; i < size; i++) {
    std::cout << v[i];
    if (i != size - 1)
      std::cout << " ";
  }
  return out;
}
template <class T> std::istream &operator>>(std::istream &in, std::vector<T> &v) {
  for (auto &el : v) {
    std::cin >> el;
  }
  return in;
}
#endif
#line 4 "/workspaces/compro/lib/template.hpp"
#include <bits/stdc++.h>
#define REP(i, n) for (int i = 0; i < n; i++)
#define FOR(i, m, n) for (int i = m; i < n; i++)
#define ALL(v) (v).begin(), (v).end()
#define coutd(n) cout << fixed << setprecision(n)
#define ll long long int
#define vl vector<ll>
#define vi vector<int>
#define MM << " " <<
using namespace std;
template <class T> void chmin(T &a, T b) {
  if (a > b)
    a = b;
}
template <class T> void chmax(T &a, T b) {
  if (a < b)
    a = b;
}
// 重複を消す。計算量はO(NlogN)
template <class T> void unique(std::vector<T> &v) {
  std::sort(v.begin(), v.end());
  v.erase(std::unique(v.begin(), v.end()), v.end());
}
#line 3 "main.cpp"
constexpr long long MOD = 1000000007;
using mint = ModInt<MOD>;
// generated by online-judge-template-generator v4.7.1 (https://github.com/online-judge-tools/template-generator)
int main() {
  int N, M;
  std::cin >> N >> M;
  std::vector<int> t(M), x(M), y(M);
  for (int i = 0; i < M; ++i) {
    std::cin >> t[i] >> x[i] >> y[i];
  }
  vector<mint> table(2 * N + 1), rev(2 * N + 1);
  mint::factorial_table(2 * N, table);
  REP(i, N + 1) { rev[i] = mint(1) / table[i]; }
  mint ans = table[2 * N] * rev[N] * rev[N] * mint(2 * N);
  REP(i, M) {
    if (t[i] == 1) {
      mint tmp = table[x[i] + y[i]] * rev[x[i]] * rev[y[i]];
      tmp *= table[2 * N - y[i] - x[i] - 1] * rev[N - y[i]] * rev[N - x[i] - 1];
      ans -= tmp;
    } else {
      mint tmp = table[x[i] + y[i]] * rev[x[i]] * rev[y[i]];
      tmp *= table[2 * N - y[i] - x[i] - 1] * rev[N - y[i] - 1] * rev[N - x[i]];
      ans -= tmp;
    }
  }
  std::cout << ans << std::endl;
  return 0;
}
            
            
            
        