제출 #103229

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
103229		E869120	철인 이종 경기 (APIO18_duathlon)	C++14	0 / 100	112 ms	8832 KiB

count_triplets

#include <iostream>
#include <vector>
using namespace std;
#pragma warning (disable: 4996)

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

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 = 0LL;
	if (M == N - 1) ans = N * (N - 1) * (N - 2) / 3LL;
	if (M == N - 0) ans = N * (N - 1) * (N - 2);
	printf("%lld\n", ans);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

count_triplets.cpp:4:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning (disable: 4996)
 
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:9:7: 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:11:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld", &A[i], &B[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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