Submission #421285

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Source Code Expand

#include <iostream>
using namespace std;

int main() {
    int N, Q;
    cin >> N >> Q;
    auto parent = new int[N+1];
    for (int i = 0; i < N+1; ++i) {
        parent[i] = i;
    }
    int P, A, B;
    for (int q = 0; q < Q; ++q) {
        scanf("%d%d%d", &P, &A, &B);
        if (P == 0) {
            int a = A;
            while (parent[a] != a) {
                int beforeParent = parent[a];
                parent[a] = B;
                a = beforeParent;
            }
            parent[a] = B;
        }
        else {
            int aroot = parent[A];
            while (parent[aroot] != aroot) {
                aroot = parent[aroot];
            }
            int broot = parent[B];
            while (parent[broot] != broot) {
                broot = parent[broot];
            }
            cout << (aroot == broot?"Yes":"No") << endl;
        }
    }

    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &P, &A, &B);
                                    ^

Judge Result