Submission #37391

#	Time	Username	Problem	Language	Result	Execution time	Memory
37391		adlet	Divide and conquer (IZhO14_divide)	C++14	0 / 100	0 ms	4748 KiB

divide

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N = 1e5 + 5;

int n, x[N], g[N], e[N];

ll de[N], dg[N], ans;

int main() {
    freopen("divide.in", "r", stdin);
    freopen("divide.out", "w", stdout);
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> x[i] >> g[i] >> e[i];
        dg[i] += dg[i - 1] + g[i];
        de[i] += de[i - 1] + e[i];
    }
    for (int l = 1; l <= n; ++l) {
        for (int r = l; r <= n; ++r) {
            int len = x[r] - x[l];
//            cout << l << " " << r << " " << dg[r] - dg[l - 1] << "\n";
            if (len <= de[r] - de[l - 1] && dg[r] - dg[l - 1] > ans) {
                ans = dg[r] - dg[l - 1];
            }
        }
    }
    cout << ans;
}

Compilation message (stderr)

divide.cpp: In function 'int main()':
divide.cpp:14:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("divide.in", "r", stdin);
                                     ^
divide.cpp:15:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen("divide.out", "w", stdout);
                                       ^

• Subtask 1: 0 / 17
• Subtask 2: 0 / 31
• Subtask 3: 0 / 52