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Submission #1087755

# Submission time Handle Problem Language Result Execution time Memory
1087755 2024-09-13T07:52:06 Z alexander707070 Duathlon (APIO18_duathlon) C++14
23 / 100
 1000 ms 1048576 KB 
#include<bits/stdc++.h>
#define MAXN 200007
using namespace std;

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

        sum[x]+=sz[v[x][i]]*(sz[v[x][i]]-1);
        sz[x]+=sz[v[x][i]];
    }
}

void dfs2(int x,int p,int s){
    comp[x]=s;

    for(int i=0;i<v[x].size();i++){
        if(v[x][i]==p)continue;
        dfs2(v[x][i],x,s);
    }

    sum[x]+=(s-sz[x])*(s-sz[x]-1);
}

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);
    }

    for(int i=1;i<=n;i++){
        if(sz[i]==0){
            dfs(i,0);
            dfs2(i,0,sz[i]);
        }
    }

    for(int i=1;i<=n;i++){
        ans+=(long long) (comp[i]-1)*(comp[i]-2)-sum[i];
    }

    cout<<ans<<"\n";

    return 0;
}

Compilation message

count_triplets.cpp: In function 'void dfs(int, int)':
count_triplets.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~
count_triplets.cpp: In function 'void dfs2(int, int, int)':
count_triplets.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 615 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 615 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1057 ms 904528 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5212 KB Output is correct
2 Correct 3 ms 5212 KB Output is correct
3 Correct 2 ms 5212 KB Output is correct
4 Correct 4 ms 5212 KB Output is correct
5 Correct 3 ms 5212 KB Output is correct
6 Correct 2 ms 5208 KB Output is correct
7 Correct 2 ms 5212 KB Output is correct
8 Correct 2 ms 5120 KB Output is correct
9 Correct 2 ms 5212 KB Output is correct
10 Correct 2 ms 5168 KB Output is correct
11 Correct 3 ms 5164 KB Output is correct
12 Correct 3 ms 5164 KB Output is correct
13 Correct 2 ms 5212 KB Output is correct
14 Correct 2 ms 5236 KB Output is correct
15 Correct 3 ms 5212 KB Output is correct
16 Correct 2 ms 5212 KB Output is correct
17 Correct 2 ms 5212 KB Output is correct
18 Correct 3 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 2 ms 5212 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 11888 KB Output is correct
2 Correct 32 ms 11820 KB Output is correct
3 Correct 29 ms 11860 KB Output is correct
4 Correct 32 ms 11852 KB Output is correct
5 Correct 35 ms 11856 KB Output is correct
6 Correct 37 ms 16088 KB Output is correct
7 Correct 35 ms 14676 KB Output is correct
8 Correct 37 ms 13900 KB Output is correct
9 Correct 36 ms 13212 KB Output is correct
10 Correct 32 ms 11856 KB Output is correct
11 Correct 29 ms 11864 KB Output is correct
12 Correct 30 ms 11748 KB Output is correct
13 Correct 29 ms 11868 KB Output is correct
14 Correct 27 ms 11552 KB Output is correct
15 Correct 24 ms 11356 KB Output is correct
16 Correct 18 ms 10328 KB Output is correct
17 Correct 21 ms 12244 KB Output is correct
18 Correct 21 ms 12112 KB Output is correct
19 Correct 21 ms 12232 KB Output is correct
20 Correct 29 ms 12220 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5212 KB Output is correct
2 Correct 2 ms 5212 KB Output is correct
3 Runtime error 638 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 12112 KB Output is correct
2 Correct 31 ms 11720 KB Output is correct
3 Runtime error 776 ms 1048576 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 615 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 615 ms 1048576 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -