Submission #1048958

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048958		Arturgo	Trains (BOI24_trains)	C++14	21 / 100	2096 ms	4428 KiB

Main

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

const int MOD = 1e9 + 7;

struct Ville {
    int raison, nbStops;
};

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    int nbVilles;
    cin >> nbVilles;

    vector<Ville> villes(nbVilles);
    for(Ville& ville : villes) {
        cin >> ville.raison >> ville.nbStops;
    }

    reverse(villes.begin(), villes.end());

    vector<int> reponses;
    for(int iVille = 0;iVille < nbVilles;iVille++) {
        int nbChemins = 1;
        Ville& v = villes[iVille];

        if(v.raison != 0) {
            for(int stop = 1;stop <= v.nbStops;stop++) {
                int pos = iVille - stop * v.raison;
                if(pos < 0) break;
                nbChemins += reponses[pos];
            }
            nbChemins %= MOD;
        }
        
        reponses.push_back(nbChemins);
    }

    cout << reponses.back() << endl;

    return 0;
}

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