Submission #1111501

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111501		Ruichen	Trains (BOI24_trains)	C++17	0 / 100	2092 ms	612 KiB

Main

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

int main(){
	int n, ans=0, d, x;
	cin >> n;
	vector<int> a(n,0);
	a[0]=1;
	for(int i=0; i<n; i++){
		cin >> d >> x;
		if(d!=0){
			for(long long j=i+d; j<=i+d*x; j+=d){
				if(j<n){
					a[j]+=a[i];
					a[j]%=1000000007;
				}
				else{
					break;
				}
			}
		}
		ans+=a[i];
		ans%=1000000007;
	}
	cout << ans << endl;
	return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 13
• Subtask 3: 0 / 16
• Subtask 4: 0 / 34
• Subtask 5: 0 / 29