Submission #1111434

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111434		zhehan	Trains (BOI24_trains)	C++14	8 / 100	2079 ms	1010492 KiB

Main

#include <bits/stdc++.h>

using namespace std;

vector<int> stops[10000+10];

int routes(int station){
    int ways=1;
    for(auto e:stops[station]){
        ways+=routes(e);
        ways%=(int)1e9+7;
    }
    return ways;
}

int main()
{
    int n,d,x,s;
    cin>>n;
    for(int i=0;i<n;++i){
        cin>>d>>x;
        if(d==0){
            continue;
        }
        s=i+1;
        for(int j=0;j<x;++j){
            if(s+d<=n){
                s+=d;
                stops[i+1].push_back(s);
            }else{
                break;
            }
        }
    }
    cout<<routes(1)%((int)1e9+7)<<'\n';
    return 0;
}

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