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답안 #138789

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
138789 2019-07-30T10:25:09 Z FedericoS 철인 이종 경기 (APIO18_duathlon) C++14
0 / 100
 1000 ms 1048580 KB 
#include <iostream>
#include <vector>
#include <map>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> pll;

bool sub3=true;

ll N,M;
ll x,y;
ll A,B,ans;
bool V[300005];
vector<ll> grafo[300005];
ll S[300005];

map <pll,ll> E;

void DFSsub3(int k){

	B++;
	if(V[k])
		return;
	A++;
	V[k]=true;

	for(int f:grafo[k])
		DFSsub3(f);}

void DFS(int k, int p=-1){

	for(int f:grafo[k])
		if(f!=p)
			DFS(f,k);

	E[{p,k}]=1;

	for(int f:grafo[k])
		if(f!=p)
			E[{p,k}]+=E[{k,f}];

	E[{k,p}]=N-E[{p,k}];

}

int main(){

	cin>>N>>M;
	for(int i=0;i<M;i++){
		cin>>x>>y;
		grafo[x].push_back(y);
		grafo[y].push_back(x);
	}

	for(int i=1;i<N+1;i++)
		if(grafo[i].size()>2)
			sub3=false;

	sub3=false;

	if(sub3){
		for(int i=1;i<N+1;i++)
			if(!V[i]){
				A=B=0;
				DFSsub3(i);
				if(B-1==2*A)
					ans+=(A*(A-1)*(A-2));
				else	
					ans+=(A*(A-1)*(A-2))/3;
			}
		cout<<ans;}
	else{
		for(int i=1;i<N+1;i++)
			DFS(i);

		for(ll i=1;i<N+1;i++){
			A=B=0;
			for(ll f:grafo[i]){
				A+=E[{i,f}];
				B+=E[{i,f}]*E[{i,f}];
			}
			A=A*A;
			ans+=A-B;
		}

		cout<<ans;

	}

}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 910 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 910 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1113 ms 463852 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 569 ms 7800 KB Output is correct
2 Correct 559 ms 7940 KB Output is correct
3 Correct 561 ms 7804 KB Output is correct
4 Correct 585 ms 8040 KB Output is correct
5 Correct 592 ms 7944 KB Output is correct
6 Correct 587 ms 8072 KB Output is correct
7 Correct 592 ms 7964 KB Output is correct
8 Correct 586 ms 7772 KB Output is correct
9 Correct 593 ms 8056 KB Output is correct
10 Incorrect 464 ms 7900 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1047 ms 25012 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 564 ms 7900 KB Output is correct
2 Correct 571 ms 8064 KB Output is correct
3 Execution timed out 1119 ms 1048580 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1079 ms 24848 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 910 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 910 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -