結果

問題 No.269 見栄っ張りの募金活動
ユーザー penguinshunyapenguinshunya
提出日時 2019-07-22 13:52:08
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 28 ms / 5,000 ms
コード長 3,505 bytes
コンパイル時間 1,754 ms
コンパイル使用メモリ 167,744 KB
実行使用メモリ 12,748 KB
最終ジャッジ日時 2024-06-23 18:35:46
合計ジャッジ時間 2,673 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge2
このコードへのチャレンジ
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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 5 ms
11,992 KB
testcase_01 AC 4 ms
12,040 KB
testcase_02 AC 5 ms
11,964 KB
testcase_03 AC 5 ms
11,916 KB
testcase_04 AC 11 ms
12,048 KB
testcase_05 AC 5 ms
12,108 KB
testcase_06 AC 6 ms
12,004 KB
testcase_07 AC 28 ms
12,084 KB
testcase_08 AC 6 ms
12,164 KB
testcase_09 AC 6 ms
11,904 KB
testcase_10 AC 6 ms
12,068 KB
testcase_11 AC 7 ms
12,156 KB
testcase_12 AC 6 ms
11,960 KB
testcase_13 AC 8 ms
11,952 KB
testcase_14 AC 6 ms
12,748 KB
testcase_15 AC 6 ms
12,124 KB
testcase_16 AC 6 ms
12,040 KB
testcase_17 AC 5 ms
11,804 KB
testcase_18 AC 13 ms
11,928 KB
testcase_19 AC 7 ms
12,048 KB
testcase_20 AC 6 ms
12,140 KB
testcase_21 AC 4 ms
12,268 KB
testcase_22 AC 7 ms
12,192 KB
testcase_23 AC 5 ms
12,056 KB
testcase_24 AC 6 ms
12,080 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); }
void solve(); int main() { ios::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(16); solve(); return 0; }
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 power(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> 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; }

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>;

int N, S, K;
mint me[110][20010];

mint dfs(int i, int t) {
  if (t > S) return 0;
  if (me[i][t].x != -1) return me[i][t];
  if (i == N) {
    return me[i][t] = (t == S);
  }
  return me[i][t] = dfs(i + 1, t + K * (N - i - 1)) + dfs(i, t + N - i);
}

void solve() {
  cin >> N >> S >> K;
  rep(i, 110) rep(j, 20010) me[i][j].x = -1;
  cout << dfs(0, 0) << '\n';
}
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