제출 #901566

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
901566		duckindog	Magneti (COCI21_magneti)	C++14	0 / 110	1072 ms	604 KiB

Main

// from duckindog wth depression
#include<bits/stdc++.h>

using namespace std;

const int N = 50 + 10,
          L = 1e4 + 10,
          M = 19 + 7;
int n, l;
int r[N];
void sub1() {
  vector<vector<long long>> f(2, vector<long long> (l + 1));
  const int x = r[1];
  for (int i = 1; i <= l; ++i) f[1][i] = n;

  for (int i = 2; i <= n; ++i) {
    int it = i & 1;
    for (int j = 0; j <= l; ++j) f[it][j] = 0;
    for (int j = x; j <= l; ++j) {
      auto &ret = f[it][j];
      for (int t = 0; t <= j - x; ++t) ret = (ret + f[it ^ 1][t]) % M;
      ret = (ret * (n - i + 1)) % M;
    }
  }
  long long answer = 0;
  for (int i = 0; i <= l; ++i) answer = (answer + f[n & 1][i]) % M;
  cout << answer;
}

int32_t main() {
  cin.tie(0)->sync_with_stdio(0);

  if (fopen("duck.inp", "r")) {
    freopen("duck.inp", "r", stdin);
    freopen("duck.out", "w", stdout);
  }
  cin >> n >> l;
  for(int i = 1; i <= n; ++i) cin >> r[i];
  sort(r + 1, r + n + 1);
  int sub = r[1] == r[n] ? 1 : n <= 10 ? 2 : (n <= 30 && l <= 300) ? 3 : 4;

  if (sub == 1) {
    sub1();
    return 0;
  }


}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int32_t main()':
Main.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("duck.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     freopen("duck.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 50