Submission #1111510

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111510		Informatics271	Trains (BOI24_trains)	C++17	21 / 100	2069 ms	1616 KiB

Main

#include <iostream>
#include <algorithm>

using namespace std;

int N;
int D[100005];
int X[100005];

//int N=10; int D[100005]={1}; int X[100005]={100,100,100,100};
long long dp[100005];

int mod=1000000007;

int main(){
	cin >> N;
	for (int i=0;i<N;i++) cin>>D[i]>>X[i];
	for (int i=N-1; i>=0; i--){
		dp[i]++;
		if (D[i]==0) continue;
		for (int j=1; j<=X[i]&&i+j*D[i]<N; j++) dp[i]=(dp[i]+dp[i+j*D[i]])%mod;
		//cout << i << dp[i] << i+D[i]*X[i] << '\n';
	}
	cout << dp[0];
}

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