Submission #996792

#	Time	Username	Problem	Language	Result	Execution time	Memory
996792		daffuwu	Bigger segments (IZhO19_segments)	C++14	37 / 100	554 ms	83492 KiB

segments

#include <bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int dp[3069][3069], n, a, mx;
long long ps[500069];

int main() 
{
    int i, j, idx;
    scanf("%d", &n);
    for (i=1; i<=n; i++)
    {
        scanf("%d", &a);
        ps[i] = ps[i-1]+a;
    }
    ps[n+1] = 1e17;
    for (i=1; i<=n; i++)
    {
        mx = -1e9;
        for (idx=i+1, j=i-1; idx<=n+1; idx++)
        {
            for (; j>=0 && ps[idx]-ps[i]>=ps[i]-ps[j]; j--)
            {
                mx = max(mx, 1+dp[j][i]);
            }
            dp[i][idx] = mx;
            // printf("dp[%d][%d] = %d\n", i, idx, dp[i][idx]);
        }
        // printf("\n");
    }
    printf("%d\n", dp[n][n+1]);    
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
segments.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         scanf("%d", &a);
      |         ~~~~~^~~~~~~~~~

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