Submission #75649467

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Source Code Expand

//競プロ　C++テンプレ
#include <bits/stdc++.h>
using namespace std;

#define all(x) x.begin(),x.end()
#define ll long long
#define pb push_back

ll gcd(ll a, ll b){
  if(a%b == 0){
    return b;
  }else{
    return gcd(b, a%b);
  }
}

int main() {
    ll N,K;
    cin >> N >> K;
    
    vector<ll> ret(N);
    vector<vector<ll>> vec(N);
    vector<ll> cc(N);
    for(int i = 0; i < N;i++){
      cin >> ret.at(i);
      for(int j = 0; j < ret.at(i); j++){
        ll jut;
        cin >> jut;
        vec.at(i).push_back(jut);
      }
    }
    
    for(int j = 0; j < N; j++){
        ll jut;
        cin >> jut;
        cc.at(j) = ret.at(j) * jut;
    }
    
    ll chack = 0;
    ll ans;
    K -= 1;
    while(K >0){
      if(K > cc.at(chack)){
        K -= cc.at(chack);
        chack++;
      }else if(K == cc.at(chack)){
        ll aa = vec.at(chack+1).at(0);
        cout << aa;
        return 0;
      }else{
        ans = K % ret.at(chack);
        break;
      }
    }
    
    //cout << chack << ans;
    ll aa = vec.at(chack).at(ans);
    cout << aa;
}

Submission Info

Compile Error

./Main.cpp: In function 'main':
./Main.cpp:57:29: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
   57 |     ll aa = vec.at(chack).at(ans);
      |                             ^
./Main.cpp:40:8: note: 'ans' was declared here
   40 |     ll ans;
      |        ^

Judge Result