Submission #488700

#	Time	Username	Problem	Language	Result	Execution time	Memory
488700		SirCovidThe19th	Divide and conquer (IZhO14_divide)	C++17	100 / 100	116 ms	7192 KiB

divide

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

const int mx = 1e5 + 5, msz = (1 << 17);

int n, X[mx]; long long G[mx], E[mx], seg[msz * 2], ans; 

void upd(int i, long long v){
    seg[i += msz] = v;
    for (i /= 2; i; i /= 2) seg[i] = min(seg[i * 2], seg[i * 2 + 1]); 
}
int qry(long long v){
    int i = 1; 
    while (i < msz) i = (seg[i * 2] <= v) ? i * 2 : i * 2 + 1;
    return i - msz;
}

int main(){
    cin >> n;
    for (int i = 1; i <= n; i++){
        cin >> X[i] >> G[i] >> E[i]; 
        G[i] += G[i - 1]; E[i] += E[i - 1];
    }
    memset(seg, 0x3f, sizeof(seg)); 
    for (int i = 1; i <= n; i++){
        upd(i, E[i - 1] - X[i]);
        int pos = qry(E[i] - X[i]);
        ans = max(ans, G[i] - G[pos - 1]);
    }
    cout<<ans<<endl;
}

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