제출 #1052863

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1052863		vjudge1	Trains (BOI24_trains)	C++17	21 / 100	2053 ms	2648 KiB

Main

/*
بسم الله الرحمن الرحيم
Author:
                          (:Muhammad Aneeq:)
*/

#include <iostream>
using namespace std;
#define int long long
int const mod=1e9+7;
inline void solve()
{
	int n;
	cin>>n;
	int d[n],x[n];
	for (int i=0;i<n;i++)
		cin>>d[i]>>x[i];
	int ans[n]={};
	ans[0]=1;
	for (int i=0;i<n;i++)
	{
		if (d[i]==0)
			continue;
		for (int j=1;j<=x[i]&&i+d[i]*j<n;j++)
		{
			ans[i+d[i]*j]+=ans[i];
			ans[i+d[i]*j]%=mod;
		}
	}
	int z=0;
	for (auto i:ans)
		z=(z+i)%mod;
	cout<<z<<endl;
}
signed main()
{
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
        solve();
}

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