Submission #49443573

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Source Code Expand

/**
 *  @the_hyp0cr1t3
 *  20.01.2024 17:34
**/
#include <bits/stdc++.h>

int main() {
    std::cin.tie(nullptr)->sync_with_stdio(false);

    int n, r;
    std::cin >> n;
    std::vector<int> nxt(n, -1);
    for (int i = 0; i < n; i++) {
        int x;
        std::cin >> x;
        if (x == -1) {
            r = i;
        } else {
            nxt[--x] = i;
        }
    }

    while (~r) {
        std::cout << r + 1 << ' ';
        r = nxt[r];
    }

}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:24:31: warning: ‘r’ may be used uninitialized [-Wmaybe-uninitialized]
   24 |         std::cout << r + 1 << ' ';
      |                               ^~~
Main.cpp:10:12: note: ‘r’ was declared here
   10 |     int n, r;
      |            ^

Judge Result