Submission #337628

#	Time	Username	Problem	Language	Result	Execution time	Memory
337628		kutbilim_one	Divide and conquer (IZhO14_divide)	C++14	100 / 100	39 ms	6924 KiB

divide

#include <bits/stdc++.h>
 
using namespace std;
 
#define endl '\n'
#define all(x) x.begin(),x.end()
#define int long long

const int MAXN = 100100; 
int x[MAXN], g[MAXN], d[MAXN], n;
int prg[MAXN], prd[MAXN], mn[MAXN];
int ans;
 
int search(int i, int E){
   	int l = 1, r = i, pos = 1;
  	while(l < r){
    	int m = (l+r)>>1;
     	if(mn[m] <= E) r = m;
      	else l = m+1;
   	}
  	return r;
}
 
signed main(){
   	ios_base::sync_with_stdio(false);
   	cin.tie(nullptr);
   
   	cin >> n;
   	for(int i = 1; i <= n; i++)
     	cin >> x[i] >> g[i] >> d[i];
   
   	mn[0] = 1e18;
   	for(int i = 1; i <= n; i++){
     	prg[i] = g[i] + prg[i-1];
     	prd[i] = d[i] + prd[i-1];
     	mn[i] = min(mn[i-1], prd[i-1] - x[i]);
      
     	int left = search(i, prd[i] - x[i]);
     	ans = max(ans, prg[i] - prg[left-1]);
  	}
   
  	cout << ans << endl;
   
	return 0;
}

Compilation message (stderr)

divide.cpp: In function 'long long int search(long long int, long long int)':
divide.cpp:15:23: warning: unused variable 'pos' [-Wunused-variable]
   15 |     int l = 1, r = i, pos = 1;
      |                       ^~~

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