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Submission #152952

# Submission time Handle Problem Language Result Execution time Memory
152952 2019-09-10T16:40:02 Z arnold518 Duathlon (APIO18_duathlon) C++14
23 / 100
 1000 ms 1048580 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1e5;

int N, M;
vector<int> adj[MAXN+10];

ll ans=0;
int sz[MAXN+10];
bool vis[MAXN+10];

void dfs1(int now, int bef)
{
    sz[now]=1; vis[now]=1;
    for(int nxt : adj[now])
    {
        if(nxt==bef) continue;
        dfs1(nxt, now);
        sz[now]+=sz[nxt];
    }
}

void dfs2(int now, int bef)
{
    int sum=0;
    for(int nxt : adj[now])
    {
        if(nxt==bef) continue;
        sz[now]-=sz[nxt];
        sz[nxt]+=sz[now];
        dfs2(nxt, now);
        sz[nxt]-=sz[now];
        sz[now]+=sz[nxt];
    }
    for(int nxt : adj[now])
    {
        ans-=(ll)sz[nxt]*sz[nxt];
        sum+=sz[nxt];
    }
    ans+=(ll)sum*sum;
}

int main()
{
    int i, j;

    scanf("%d%d", &N, &M);
    for(i=1; i<=M; i++)
    {
        int u, v;
        scanf("%d%d", &u, &v);
        adj[u].push_back(v);
        adj[v].push_back(u);
    }

    for(i=1; i<=N; i++) if(!vis[i])
    {
        dfs1(i, i);
        dfs2(i, i);
    }
    printf("%lld", ans);
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:50:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
count_triplets.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~
count_triplets.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &u, &v);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 949 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

# Verdict Execution time Memory Grader output
1 Runtime error 949 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

# Verdict Execution time Memory Grader output
1 Execution timed out 1069 ms 293376 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 5 ms 2680 KB Output is correct
3 Correct 5 ms 2808 KB Output is correct
4 Correct 5 ms 2808 KB Output is correct
5 Correct 5 ms 2808 KB Output is correct
6 Correct 5 ms 2808 KB Output is correct
7 Correct 5 ms 2808 KB Output is correct
8 Correct 6 ms 2808 KB Output is correct
9 Correct 5 ms 2680 KB Output is correct
10 Correct 5 ms 2808 KB Output is correct
11 Correct 5 ms 2684 KB Output is correct
12 Correct 5 ms 2808 KB Output is correct
13 Correct 5 ms 2724 KB Output is correct
14 Correct 6 ms 2680 KB Output is correct
15 Correct 5 ms 2680 KB Output is correct
16 Correct 5 ms 2680 KB Output is correct
17 Correct 5 ms 2808 KB Output is correct
18 Correct 5 ms 2808 KB Output is correct
19 Correct 5 ms 2680 KB Output is correct
20 Correct 5 ms 2808 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 6776 KB Output is correct
2 Correct 94 ms 7800 KB Output is correct
3 Correct 85 ms 7672 KB Output is correct
4 Correct 77 ms 7800 KB Output is correct
5 Correct 72 ms 7692 KB Output is correct
6 Correct 79 ms 11768 KB Output is correct
7 Correct 84 ms 10364 KB Output is correct
8 Correct 81 ms 9724 KB Output is correct
9 Correct 80 ms 8924 KB Output is correct
10 Correct 80 ms 7672 KB Output is correct
11 Correct 73 ms 7688 KB Output is correct
12 Correct 78 ms 7816 KB Output is correct
13 Correct 66 ms 7672 KB Output is correct
14 Correct 69 ms 7544 KB Output is correct
15 Correct 58 ms 7160 KB Output is correct
16 Correct 42 ms 6136 KB Output is correct
17 Correct 51 ms 7920 KB Output is correct
18 Correct 53 ms 7920 KB Output is correct
19 Correct 53 ms 7912 KB Output is correct
20 Correct 53 ms 7928 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2680 KB Output is correct
2 Correct 5 ms 2936 KB Output is correct
3 Execution timed out 1040 ms 1048580 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 72 ms 6648 KB Output is correct
2 Correct 83 ms 7672 KB Output is correct
3 Execution timed out 1112 ms 920728 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 949 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

# Verdict Execution time Memory Grader output
1 Runtime error 949 ms 1048580 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -