Submission #620117

#	Time	Username	Problem	Language	Result	Execution time	Memory
620117		Jovan26	Fountain (eJOI20_fountain)	C++14	0 / 100	1579 ms	3040 KiB

fountain

#include<iostream>
using namespace std;
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int n,q;
	cin>>n>>q;
	int d[n+1],c[n+1],r[q],v[q];
	d[0]=0;
	c[0]=0;
	int pr[n];
	pr[0]=0;
	for(int i=1;i<=n;i++){
		cin>>d[i]>>c[i];
		pr[i]=pr[i-1]+c[i];
	}
	for(int i=0;i<q;i++){
		cin>>r[i]>>v[i];
		int l = r[i];
		int r1 = n;
		if(pr[n]-pr[r[i]-1]<v[i]){
			cout<<0<<endl;
			continue;
		}
		while(l<=r1){
			int mid;
			if((l+r1)%2==0) mid = (l+r1)/2;
			else mid = (l+r1)/2+1;
			if(pr[mid]-pr[r[i]-1]==v[i]){
				cout<<mid<<endl;
				break;
			}
			if(pr[mid]-pr[r[i]-1]>v[i]){
			 r1 = mid;
			 if(pr[mid-1]-pr[r[i]-1]<=v[i]){
			 	cout<<mid<<endl;
			 	break;
			 }
			 }
			else{
			l = mid;
			if(pr[mid+1]-pr[r[i]-1]>v[i]){
				cout<<mid+1<<endl;
				break;
			}
			}
		}
	}
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40