Submission #49803

#	Time	Username	Problem	Language	Result	Execution time	Memory
49803		mra2322001	Divide and conquer (IZhO14_divide)	C++14	100 / 100	80 ms	22724 KiB

divide

#include <bits/stdc++.h>
#define f0(i, n) for(int i=(0); i<n; i++)
#define f1(i, n) for(int i=(1); i<=n; i++)

using namespace std;
typedef long long ll;
const int N = 1e5 + 3;

int n;
ll x[N], g[N], d[N], ma[N], sum[N];

main(){
    ios_base::sync_with_stdio(0);

    cin >> n;
    f1(i, n) cin >> x[i] >> g[i] >> d[i];
    f1(i, n) d[i] += d[i - 1];
    f1(i, n) sum[i] = sum[i - 1] + g[i];
    ma[0] = 1e17;
    f1(i, n){
        ma[i] = d[i - 1] - x[i];
    }
    f1(i, n) ma[i] = min(ma[i], ma[i - 1]);
    ll res = 0;
    f1(i, n){
        ll t = d[i] - x[i];
        int l = 1, r = i - 1, ans = 0;
        while(l <= r){
            int mid = (l + r)/2;
            if(ma[mid] <= t) r = mid - 1, ans = mid;
            else l = mid + 1;
        }
        res = max(res, g[i]);
        if(ans){
            res = max(res, sum[i] - sum[ans - 1]);
        }
    }
    cout << res;
}

Compilation message (stderr)

divide.cpp:12:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

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