oj.uz

답안 #866131

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
866131 2023-10-25T13:03:37 Z alexander707070 철인 이종 경기 (APIO18_duathlon) C++14
0 / 100
 1000 ms 1048576 KB 
#include<bits/stdc++.h>
#define MAXN 100007
using namespace std;

long long n,m,a,b;
long long sz[MAXN];
vector<int> v[MAXN];

long long ans;

void dfs(int x,int p){

    sz[x]=1;
    for(int i=0;i<v[x].size();i++){
        if(v[x][i]==p)continue;
        dfs(v[x][i],x);
        sz[x]+=sz[v[x][i]];
    }
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>a>>b;
        v[a].push_back(b);
        v[b].push_back(a);
    }

    dfs(1,0);

    for(long long i=1;i<=n;i++){
        ans+=(n-1)*(n-2);
        for(int f=0;f<v[i].size();f++){
            if(sz[v[i][f]]<sz[i]){
                ans-=sz[v[i][f]]*(sz[v[i][f]]-1);
            }else{
                ans-=(n-sz[i])*(n-sz[i]-1);
            }
        }
    }

    cout<<ans<<"\n";

    return 0;
}

Compilation message

count_triplets.cpp: In function 'void dfs(int, int)':
count_triplets.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~
count_triplets.cpp: In function 'int main()':
count_triplets.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         for(int f=0;f<v[i].size();f++){
      |                     ~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 592 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 592 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1062 ms 995728 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2904 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 1 ms 2652 KB Output is correct
7 Correct 1 ms 2904 KB Output is correct
8 Correct 1 ms 2660 KB Output is correct
9 Correct 1 ms 2656 KB Output is correct
10 Incorrect 1 ms 2652 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 8016 KB Output is correct
2 Correct 27 ms 8028 KB Output is correct
3 Correct 27 ms 8024 KB Output is correct
4 Correct 26 ms 7944 KB Output is correct
5 Correct 28 ms 7912 KB Output is correct
6 Correct 29 ms 11356 KB Output is correct
7 Correct 31 ms 10096 KB Output is correct
8 Correct 29 ms 9408 KB Output is correct
9 Correct 27 ms 9044 KB Output is correct
10 Incorrect 26 ms 8020 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2856 KB Output is correct
3 Runtime error 668 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 7932 KB Output is correct
2 Correct 25 ms 8028 KB Output is correct
3 Runtime error 741 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 592 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 592 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -