Submission #628050

#	Time	Username	Problem	Language	Result	Execution time	Memory
628050		BackNoob	Bigger segments (IZhO19_segments)	C++14	27 / 100	1590 ms	38228 KiB

segments

#include<bits/stdc++.h>
#define ll long long
#define fi first
#define se se cond
#define pb push_back
#define all(x) (x).begin(), (x).end()
using namespace std;
const int mxN = 3227;
const int inf = 1e9 + 7;
const int infll = 1e18 + 7;

int n;
int a[mxN];
ll pre[mxN];
int dp[mxN][mxN];

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //freopen("task.inp", "r", stdin);
    //freopen("task.out", "w", stdout);
    cin >> n;
    for(int i = 1; i <= n; i++) cin >> a[i];


    for(int i = 1; i <= n; i++) pre[i] = pre[i - 1] + a[i];

    for(int i = 0; i <= n; i++)
    for(int j = 0; j <= n; j++) dp[i][j] = -inf;

    for(int i = 1; i <= n; i++) dp[0][i] = 1;

    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= i; j++) {
            for(int k = 0; k <= j; k++) {
                if(pre[i] - pre[j] >= pre[j] - pre[k] && dp[k][j] > 0) {
                    dp[j][i] = max(dp[j][i], dp[k][j] + 1);
                }
            }
        }
    }

    int ans = 0;
    for(int i = 0; i <= n; i++) ans= max(ans, dp[i][n]);
    cout << ans;

}

Compilation message (stderr)

segments.cpp:10:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   10 | const int infll = 1e18 + 7;
      |                   ~~~~~^~~

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