Submission #629022

#	Time	Username	Problem	Language	Result	Execution time	Memory
629022		bojackduy	Bigger segments (IZhO19_segments)	C++14	27 / 100	1583 ms	70860 KiB

segments

#include <bits/stdc++.h>
#define int long long
using namespace std;
typedef vector<int> vi;
typedef long long ll;
const int N = 1e6 + 1;
int n, res;
int a[N];

int32_t main() {
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    vector<vi> dp(n + 1, vi(n + 1, -1e9));
    for (int i = 1; i <= n; i++) dp[0][i] = 1;
    vector<ll> pre(n + 1, 0);
    for (int i = 1; i <= n; i++) pre[i] = pre[i - 1] + a[i];
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= i; j++) {
            for (int k = 0; k <= j; k++) {
                int sum2 = pre[i] - pre[j];
                int sum1 = pre[j] - pre[k];
                if (sum1 <= sum2 && dp[k][j] > 0) {
                    dp[j][i] = max(dp[j][i], dp[k][j] + 1);
                }
            }
        }
    }
    int res = 0;
    for (int i = 0; i <= n; i++) res = max(res, dp[i][n]);
    cout << res;
    return 0;
}

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