Submission #489991

#	Time	Username	Problem	Language	Result	Execution time	Memory
489991		hoanghq2004	Bigger segments (IZhO19_segments)	C++14	27 / 100	1593 ms	98544 KiB

segments

#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

using namespace std;

const int Nmax = 5010;

int n;
long long s[Nmax];
int f[Nmax][Nmax];

int main() {
    ios :: sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> s[i];
        s[i] += s[i - 1];
    }
    memset(f, -60, sizeof(f));
    for (int i = 1; i <= n; ++i) f[i][1] = 0;
    for (int l = 2; l <= n; ++l) {
//        int j = l - 1;
//        while (j <= )
        for (int i = l, j = l - 1; i <= n; ++i) {
            for (int j = l - 1; j < i; ++j) {
                if (f[j][l - 1] < 0) continue;
                if (s[i] - s[j] >= s[j] - s[f[j][l - 1]]) f[i][l] = j;// cout << l << ' ' << i << ' ' << j << '\n';
            }
        }
    }
    int ans = 0;
    for (int i = 1; i <= n; ++i) if (f[n][i] >= 0) ans = i;
    cout << ans;
}

Compilation message (stderr)

segments.cpp: In function 'int main()':
segments.cpp:25:25: warning: unused variable 'j' [-Wunused-variable]
   25 |         for (int i = l, j = l - 1; i <= n; ++i) {
      |                         ^

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