Submission #48664689

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Source Code Expand

// LUOGU_RID: 140266534
#include <bits/stdc++.h>
using namespace std; 

int n;
vector<int> G[100005];

int dfs(int x, int fa) {
	int r = 0;
	for (int y : G[x]) if (y != fa) r ^= dfs(y, x) + 1; 
	return r;
}

int main() {
	scanf("%d", &n);
	for (int i = 1, x, y; i < n; ++i)
		scanf("%d%d", &x, &y),
		G[x].push_back(y),
		G[y].push_back(x);
	puts(dfs(1, 0) ? "Alice" : "Bob");
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:15:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   15 |         scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
Main.cpp:17:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   17 |                 scanf("%d%d", &x, &y),
      |                 ~~~~~^~~~~~~~~~~~~~~~

Judge Result