제출 #344581

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
344581		Nurlykhan	Bigger segments (IZhO19_segments)	C++17	0 / 100	1 ms	364 KiB

segments

#include <bits/stdc++.h>

#define ll long long

using namespace std;

const int N = (int)500 + 10;
const int mod = (int)1e9 + 7;

int n;
int a[N];
ll pref[N];

ll get_sum(int l, int r) {
    return pref[r + 1] - pref[l];
}

int dp[N][N];

int main() {
    freopen("in.txt", "r", stdin);
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
        pref[i] = pref[i - 1] + a[i];
        printf("%d ", pref[i]);
    }
    printf("\n");

    for (int r0 = 0; r0 <= n; r0++) {
        for (int r1 = r0 + 1; r1 <= n; r1++) {
            dp[r0][r1] = -mod;
        }
        dp[0][r0] = 0;
    }
    for (int r0 = 0; r0 <= n; r0++) {
        for (int r1 = r0 + 1; r1 <= n; r1++) {
            for (int r2 = r1 + 1; r2 <= n; r2++) {
                if (2 * pref[r1] - pref[r0] <= pref[r2]) {
                    dp[r1][r2] = max(dp[r1][r2], dp[r0][r1] + 1);
                }
            }
        }
    }

    int ans = 0;
    for (int r0 = 0; r0 <= n; r0++)
        ans = max(ans, dp[r0][n]);
    cout << ans + 1;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

segments.cpp: In function 'int main()':
segments.cpp:26:18: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   26 |         printf("%d ", pref[i]);
      |                 ~^    ~~~~~~~
      |                  |          |
      |                  int        long long int
      |                 %lld
segments.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     freopen("in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
segments.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
segments.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27