Submission #344582

#	Time	Username	Problem	Language	Result	Execution time	Memory
344582		Nurlykhan	Bigger segments (IZhO19_segments)	C++17	27 / 100	26 ms	1388 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() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
        pref[i] = pref[i - 1] + a[i];
    }

    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;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
segments.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

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