Submission #26902319

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Source Code Expand

#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
 
int main(){
    int n, q, x, y, z;
    cin >> n >> q;
    int a[n + 1] = {}, b[n + 1] = {};
    for(int i = 0; i < q; i++){
        cin >> x;
        if(x == 1){
            cin >> y >> z;
            b[y] = z;
            a[z] = y;
        }
        else if(x == 2){
            cin >> y >> z;
            b[y] = a[z] = 0;
        }
        else{
            vector<int> v;
            cin >> y;
            while(a[y] > 0) y = a[y];
            v.push_back(y);
            while(b[y] > 0){
                v.push_back(b[y]);
                y = b[y];
            }
            cout << v.size();
            for(int i = 0; i < v.size(); i++) cout << " " << v[i];
            cout << endl;
        }
    }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:31:30: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   31 |             for(int i = 0; i < v.size(); i++) cout << " " << v[i];
      |                            ~~^~~~~~~~~~

Judge Result