Submission #441184

#	Time	Username	Problem	Language	Result	Execution time	Memory
441184		zxcvbnm	Divide and conquer (IZhO14_divide)	C++14	17 / 100	1 ms	332 KiB

divide

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
struct S {
    ll x, g, e;
};
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<S> a(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i].x >> a[i].g >> a[i].e;
    }
    vector<S> pref(n+1, {0, 0, 0});
    for(int i = 1; i <= n; i++) {
        pref[i] = {a[i-1].x, pref[i-1].g+a[i-1].g, pref[i-1].e+a[i-1].e};
    }

//    ll ans = 0;
//    for(int i = 1; i <= n; i++) {
//        for(int j = i; j <= n; j++) {
////            cout << i << " " << j << " " << pref[j].x-pref[i-1].x << " " << pref[j].e-pref[i-1].e << " " << pref[j].g-pref[i-1].g << "\n";
//            if (pref[j].x-pref[i].x <= pref[j].e-pref[i-1].e) {
//                ans = max(ans, pref[j].g-pref[i-1].g);
//            }
//        }
//    }

    ll ans = 0;
    int r = 0;
    for(int i = 1; i <= n; i++) {
        r = max(r, i);
        while(r <= n && pref[r].x - pref[i].x <= pref[r].e - pref[i-1].e) {
            ans = max(ans, pref[r].g-pref[i-1].g);
            r++;
        }
    }
    cout << ans << "\n";
    return 0;
}

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