Submission #1518714

---

Source Code Expand

#include <cstdio>
#include <vector>
#include <algorithm>
#pragma warning(disable : 4996)
using namespace std;
int N, a, b, d[100009]; vector<int> g[100009];
int solve(int pos, int pre) {
	int ret = 0, mx = 0;
	for (int i : g[pos]) {
		if (i != pre) {
			int res = solve(i, pos);
			mx = max(mx, res);
			ret += res;
		}
	}
	return max(ret, mx + 1);
}
int main() {
	scanf("%d", &N);
	for (int i = 1; i < N; i++) {
		scanf("%d %d", &a, &b); a--, b--;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	int ret = N;
	for (int i = 0; i < N; i++) {
		if (g[i].size() >= 3) {
			ret = solve(i, -1); break;
		}
	}
	printf("%d\n", ret);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
                 ^
./Main.cpp:21:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &a, &b); a--, b--;
                         ^

Judge Result