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답안 #106079

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
106079 2019-04-16T13:02:06 Z mzhao Mergers (JOI19_mergers) C++11
0 / 100
 28 ms 23928 KB 
#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#define D(x...) printf(x)
#else
#define D(x...)
#endif

#define MN 500100

int N, K, S[MN];
vector<int> adj[MN];

int tot[MN], cnt[MN], ans;
int bad[MN];

void dfs(int n, int p) {
	int cur[8];
	for (int i = 1; i <= K; i++) cur[i] = cnt[i];
	cnt[S[n]]++;
	for (int i : adj[n]) if (i != p) {
		dfs(i, n);
		bad[n] += bad[i];
	}
	for (int i = 1; i <= K; i++) cur[i] = cnt[i]-cur[i];
	while (bad[n] > 1) {
		bad[n] -= 2;
		ans++;
	}
	if (n == 1) return;
	bool f = 1;
	for (int i = 1; i <= K; i++) if (cur[i] && cur[i] != tot[i]) {
		f = 0;
		break;
	}
	if (f) bad[n] = 1;
}

int main() {
	scanf("%d%d", &N, &K);
	assert(N <= 100);
	for (int i = 1, A, B; i < N; i++) {
		scanf("%d%d", &A, &B);
		adj[A].push_back(B);
		adj[B].push_back(A);
	}
	for (int i = 1; i <= N; i++) {
		scanf("%d", &S[i]);
		tot[S[i]]++;
	}
	dfs(1, 0);
	if (bad[1]) ans++;
	printf("%d\n", ans);
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:41:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~
mergers.cpp:44:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &A, &B);
   ~~~~~^~~~~~~~~~~~~~~~
mergers.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &S[i]);
   ~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12160 KB Output is correct
2 Correct 12 ms 12160 KB Output is correct
3 Correct 15 ms 12160 KB Output is correct
4 Correct 12 ms 12032 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 13 ms 12160 KB Output is correct
7 Correct 15 ms 12160 KB Output is correct
8 Correct 16 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12160 KB Output is correct
11 Correct 15 ms 12032 KB Output is correct
12 Incorrect 12 ms 12160 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12160 KB Output is correct
2 Correct 12 ms 12160 KB Output is correct
3 Correct 15 ms 12160 KB Output is correct
4 Correct 12 ms 12032 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 13 ms 12160 KB Output is correct
7 Correct 15 ms 12160 KB Output is correct
8 Correct 16 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12160 KB Output is correct
11 Correct 15 ms 12032 KB Output is correct
12 Incorrect 12 ms 12160 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12160 KB Output is correct
2 Correct 12 ms 12160 KB Output is correct
3 Correct 15 ms 12160 KB Output is correct
4 Correct 12 ms 12032 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 13 ms 12160 KB Output is correct
7 Correct 15 ms 12160 KB Output is correct
8 Correct 16 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12160 KB Output is correct
11 Correct 15 ms 12032 KB Output is correct
12 Incorrect 12 ms 12160 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 28 ms 23928 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 12160 KB Output is correct
2 Correct 12 ms 12160 KB Output is correct
3 Correct 15 ms 12160 KB Output is correct
4 Correct 12 ms 12032 KB Output is correct
5 Correct 13 ms 12160 KB Output is correct
6 Correct 13 ms 12160 KB Output is correct
7 Correct 15 ms 12160 KB Output is correct
8 Correct 16 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12160 KB Output is correct
11 Correct 15 ms 12032 KB Output is correct
12 Incorrect 12 ms 12160 KB Output isn't correct
13 Halted 0 ms 0 KB -