結果

問題 No.801 エレベーター
ユーザー penguinshunyapenguinshunya
提出日時 2020-01-26 22:14:53
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 179 ms / 2,000 ms
コード長 3,843 bytes
コンパイル時間 1,819 ms
コンパイル使用メモリ 174,712 KB
実行使用メモリ 38,744 KB
最終ジャッジ日時 2024-09-14 11:33:59
合計ジャッジ時間 5,963 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge6
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 12 ms
38,480 KB
testcase_01 AC 12 ms
38,556 KB
testcase_02 AC 12 ms
38,472 KB
testcase_03 AC 14 ms
38,596 KB
testcase_04 AC 14 ms
38,536 KB
testcase_05 AC 13 ms
38,656 KB
testcase_06 AC 13 ms
38,556 KB
testcase_07 AC 14 ms
38,564 KB
testcase_08 AC 13 ms
38,572 KB
testcase_09 AC 14 ms
38,576 KB
testcase_10 AC 14 ms
38,488 KB
testcase_11 AC 14 ms
38,624 KB
testcase_12 AC 13 ms
38,592 KB
testcase_13 AC 178 ms
38,532 KB
testcase_14 AC 178 ms
38,552 KB
testcase_15 AC 177 ms
38,628 KB
testcase_16 AC 178 ms
38,668 KB
testcase_17 AC 179 ms
38,716 KB
testcase_18 AC 178 ms
38,544 KB
testcase_19 AC 178 ms
38,660 KB
testcase_20 AC 177 ms
38,584 KB
testcase_21 AC 178 ms
38,744 KB
testcase_22 AC 179 ms
38,544 KB
testcase_23 AC 171 ms
38,512 KB
testcase_24 AC 171 ms
38,680 KB
testcase_25 AC 171 ms
38,688 KB
testcase_26 AC 172 ms
38,576 KB
testcase_27 AC 171 ms
38,664 KB
testcase_28 AC 172 ms
38,576 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < int(n); i++)
#define rrep(i, n) for (int i = int(n) - 1; i >= 0; i--)
#define reps(i, n) for (int i = 1; i <= int(n); i++)
#define rreps(i, n) for (int i = int(n); i >= 1; i--)
#define repc(i, n) for (int i = 0; i <= int(n); i++)
#define rrepc(i, n) for (int i = int(n); i >= 0; i--)
#define repi(i, a, b) for (int i = int(a); i < int(b); i++)
#define repic(i, a, b) for (int i = int(a); i <= int(b); i++)
#define each(x, y) for (auto &x : y)
#define all(a) (a).begin(), (a).end()
#define bit(b) (1ll << (b))

using namespace std;

using i32 = int;
using i64 = long long;
using u64 = unsigned long long;
using f80 = long double;
using vi32 = vector<i32>;
using vi64 = vector<i64>;
using vu64 = vector<u64>;
using vf80 = vector<f80>;
using vstr = vector<string>;

inline void yes() { cout << "Yes" << '\n'; exit(0); }
inline void no() { cout << "No" << '\n'; exit(0); }
inline i64 gcd(i64 a, i64 b) { if (min(a, b) == 0) return max(a, b); if (a % b == 0) return b; return gcd(b, a % b); }
inline i64 lcm(i64 a, i64 b) { return a / gcd(a, b) * b; }
inline u64 xorshift() { static u64 x = 88172645463325252ull; x = x ^ (x << 7); return x = x ^ (x >> 9); }
template <typename T> class pqasc : public priority_queue<T, vector<T>, greater<T>> {};
template <typename T> class pqdesc : public priority_queue<T, vector<T>, less<T>> {};
template <typename T> inline void amax(T &x, T y) { if (x < y) x = y; }
template <typename T> inline void amin(T &x, T y) { if (x > y) x = y; }
template <typename T> inline T exp(T x, i64 n, T e = 1) { T r = e; while (n > 0) { if (n & 1) r *= x; x *= x; n >>= 1; } return r; }
template <typename T> inline T bis(T ok, T ng, function<bool(T)> f, T eps = 1) { while (abs(ok - ng) > eps) { T mi = (ok + ng) / 2; (f(mi) ? ok : ng) = mi; } return ok; }
template <typename T> istream& operator>>(istream &is, vector<T> &v) { each(x, v) is >> x; return is; }
template <typename T> ostream& operator<<(ostream &os, vector<T> &v) { rep(i, v.size()) { if (i) os << ' '; os << v[i]; } return os; }
template <typename T, typename S> istream& operator>>(istream &is, pair<T, S> &p) { is >> p.first >> p.second; return is; }
template <typename T, typename S> ostream& operator<<(ostream &os, pair<T, S> &p) { os << p.first << ' ' << p.second; return os; }
void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }

template <int mod>
struct ModInt {
  int x;
  ModInt(): x(0) {}
  ModInt(long long a) { x = a % mod; if (x < 0) x += mod; }
  ModInt &operator+=(ModInt that) { x = (x + that.x) % mod; return *this; }
  ModInt &operator-=(ModInt that) { x = (x + mod - that.x) % mod; return *this; }
  ModInt &operator*=(ModInt that) { x = (long long) x * that.x % mod; return *this; }
  ModInt &operator/=(ModInt that) { return *this *= that.inverse(); }
  ModInt inverse() {
    int a = x, b = mod, u = 1, v = 0;
    while (b) { int t = a / b; a -= t * b; u -= t * v; swap(a, b); swap(u, v); }
    return ModInt(u);
  }
  #define op(o, p) ModInt operator o(ModInt that) { return ModInt(*this) p that; }
    op(+, +=) op(-, -=) op(*, *=) op(/, /=)
  #undef op
  friend ostream& operator<<(ostream &os, ModInt m) { return os << m.x; }
};

using mint = ModInt<1000000007>;

mint dp[3001][3000];

void solve() {
  int n, m, k;
  cin >> n >> m >> k;
  vector<pair<int, int>> lr(m);
  rep(i, m) cin >> lr[i];
  rep(i, m) lr[i].first--;
  
  dp[0][0] = 1;
  
  rep(i, k) {
    vector<mint> sums(n + 1);
    rep(j, n) sums[j + 1] += sums[j] + dp[i][j];
    each(p, lr) {
      int l, r;
      tie(l, r) = p;
      dp[i + 1][l] += sums[r] - sums[l];
      if (r < n) dp[i + 1][r] -= sums[r] - sums[l];
    }
    reps(j, n - 1) {
      dp[i + 1][j] += dp[i + 1][j - 1];
    }
  }

  cout << dp[k][n - 1] << endl;
}
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