Submission #1189578

#	Time	Username	Problem	Language	Result	Execution time	Memory
1189578		diyah999	Divide and conquer (IZhO14_divide)	C++20	0 / 100	151 ms	144448 KiB

divide

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    // File input/output
    freopen("divide.in", "r", stdin);
    freopen("divide.out", "w", stdout);

    ll n;
    cin >> n;

    vector<ll> x(n), g(n), d(n);
    for (ll i = 0; i < n; ++i)
        cin >> x[i] >> g[i] >> d[i];

    ll ans = 0, totalG = 0, totalD = 0;
    ll l = 0;

    for (ll r = 0; r < n; ++r) {
        totalG += g[r];
        totalD += d[r];

        while (l <= r && totalD < x[r] - x[l]) {
            totalG -= g[l];
            totalD -= d[l];
            ++l;
        }

        if (totalD >= x[r] - x[l])
            ans = max(ans, totalG);
    }

    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

divide.cpp: In function 'int main()':
divide.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen("divide.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
divide.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     freopen("divide.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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