oj.uz

답안 #103230

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
103230 2019-03-29T09:08:04 Z E869120 철인 이종 경기 (APIO18_duathlon) C++14
8 / 100
 213 ms 11768 KB 
#include <iostream>
#include <vector>
using namespace std;
#pragma warning (disable: 4996)

long long N, M, A[200009], B[200009], col[100009], cnt1, cnt2; vector<int>X[100009];

void dfs(int pos) {
	if (col[pos] >= 1) return;
	col[pos] = 1; cnt1 += 1; cnt2 += X[pos].size();
	for (int i = 0; i < X[pos].size(); i++) {
		dfs(X[pos][i]);
	}
}

int main() {
	scanf("%lld%lld", &N, &M);
	for (int i = 1; i <= M; i++) {
		scanf("%lld%lld", &A[i], &B[i]);
		X[A[i]].push_back(B[i]);
		X[B[i]].push_back(A[i]);
	}
	
	long long ans = 0;
	for (int i = 1; i <= N; i++) {
		if (col[i] >= 1) continue;
		cnt1 = 0; cnt2 = 0;
		dfs(i); cnt2 /= 2;

		if (cnt1 == cnt2) ans += 1LL * cnt1 * (cnt1 - 1) * (cnt1 - 2);
		else ans += 1LL * cnt1 * (cnt1 - 1) * (cnt1 - 2) / 3LL;
	}

	printf("%lld\n", ans);
	return 0;
}

Compilation message

count_triplets.cpp:4:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning (disable: 4996)
 
count_triplets.cpp: In function 'void dfs(int)':
count_triplets.cpp:11:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < X[pos].size(); i++) {
                  ~~^~~~~~~~~~~~~~~
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld%lld", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~~~~~
count_triplets.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld", &A[i], &B[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 111 ms 11320 KB Output is correct
2 Correct 131 ms 11256 KB Output is correct
3 Correct 149 ms 9756 KB Output is correct
4 Correct 163 ms 11768 KB Output is correct
5 Correct 126 ms 10596 KB Output is correct
6 Correct 132 ms 10464 KB Output is correct
7 Correct 115 ms 10124 KB Output is correct
8 Correct 120 ms 10332 KB Output is correct
9 Correct 213 ms 9720 KB Output is correct
10 Correct 118 ms 9976 KB Output is correct
11 Correct 109 ms 9080 KB Output is correct
12 Correct 100 ms 8952 KB Output is correct
13 Correct 104 ms 8692 KB Output is correct
14 Correct 86 ms 8440 KB Output is correct
15 Correct 68 ms 7584 KB Output is correct
16 Correct 69 ms 7544 KB Output is correct
17 Correct 11 ms 3456 KB Output is correct
18 Correct 6 ms 3456 KB Output is correct
19 Correct 7 ms 3456 KB Output is correct
20 Correct 7 ms 3456 KB Output is correct
21 Correct 7 ms 3328 KB Output is correct
22 Correct 7 ms 3456 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 2816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 94 ms 8336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 130 ms 8304 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -