Submission #1265095

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265095		vito	Trains (BOI24_trains)	C++20	8 / 100	2093 ms	1348 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
#define F first
#define S second
#define sz(x) int(x.size())
const ll MOD=1e9+7;
signed main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int n;
	cin >> n;
	vector<ll> d(n+1), x(n+1);
	for(int i=1; i<=n; i++) {
		cin >> d[i] >> x[i];
	}
	vector<ll> o(n+1);
	o[1]=1;
	ll s=1;
	for(int i=2; i<=n; i++) {
		for(int j=1; j<i; j++) {
			if(d[j]!=0 && i%d[j]==j%d[j] && (i-j)/d[j]<=x[j]) {
				o[i]=(o[i]+o[j])%MOD;
			}
		}
		s+=o[i];
	}
	cout << s << '\n';
	return 0;
}

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