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Submission #401432

# Submission time Handle Problem Language Result Execution time Memory
401432 2021-05-10T09:15:47 Z Hazem Duathlon (APIO18_duathlon) C++14
23 / 100
 104 ms 21500 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define LL long long
#define F first
#define S second
#define pii pair<int,int>
#define piii pair<pair<int,int>,int>

const int N = 2e5+10;
const int M = 200;
const LL INF = 1e9;
const LL LINF = 1e14;
const LL MOD = 1e9+7;
const double PI = 3.141592653589793;

vector<int>adj[N];
LL sizes[N],depth[N],mx[N],mn[N],n,m,par[N];
bool vis[N];

int dfs1(int i,int pre){

    par[i] = pre;
    sizes[i] = vis[i] = 1;
    for(auto x:adj[i])
        if(!vis[x])
            depth[x] = depth[i]+1,sizes[i] += dfs1(x,i);

        else if(x!=pre){
            int cur = i;
            while(depth[cur]>=depth[x])mx[cur] = x,mn[cur] = i,cur = par[cur];
        }

    return sizes[i];
}

LL C(LL n,LL k){

    LL ret = 1,d = 1;
    for(int i=n;i>=n-k+1;i--)
        ret = ret*i,d *= n-i+1;

    return ret/d;
}

LL dfs(int i,int pre,int sz){

    LL ret = 0;
    for(auto x:adj[i])
        if(depth[x]==depth[i]+1)
            ret += dfs(x,i,sz);
    
    LL cur = sz-1;
    for(auto x:adj[i]){
        
        if(depth[x]==depth[i]+1||x==pre){
            LL v = 0;
            if(x==pre)v = sz-sizes[i];
            else v = sizes[x];
            ret += (cur-v)*v;
        }
    }

        if(mx[i]&&mx[i]!=i){
            LL len = -depth[mx[i]]+depth[i]-1;
            ret += len*(sz-sizes[mx[i]]+1)*2;
        }

        if(mn[i]&&mn[i]!=i){
            LL len = depth[mn[i]]-depth[i]-1;
            ret += len*(sizes[mn[i]])*2;
        }

    return ret;
}

int main(){

    //freopen("out.txt","w",stdout);
    //freopen("out.txt","r",stdin);

    scanf("%d%d",&n,&m);

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

    depth[0] = -1;
    LL ans = 0;
    for(int i=1;i<=n;i++)
        if(!vis[i]){
            int sz = dfs1(i,0);
            ans += dfs(i,0,sz);
        }

    printf("%lld\n",ans);
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:82:13: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   82 |     scanf("%d%d",&n,&m);
      |            ~^    ~~
      |             |    |
      |             int* long long int*
      |            %lld
count_triplets.cpp:82:15: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
   82 |     scanf("%d%d",&n,&m);
      |              ~^     ~~
      |               |     |
      |               int*  long long int*
      |              %lld
count_triplets.cpp:82:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   82 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
count_triplets.cpp:86:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   86 |         scanf("%d%d",&u,&v);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 104 ms 21500 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5068 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Correct 4 ms 5068 KB Output is correct
4 Correct 4 ms 5068 KB Output is correct
5 Correct 4 ms 5068 KB Output is correct
6 Correct 4 ms 5068 KB Output is correct
7 Correct 4 ms 5068 KB Output is correct
8 Correct 4 ms 5068 KB Output is correct
9 Correct 4 ms 5068 KB Output is correct
10 Correct 4 ms 5068 KB Output is correct
11 Correct 4 ms 5068 KB Output is correct
12 Correct 4 ms 5068 KB Output is correct
13 Correct 4 ms 5068 KB Output is correct
14 Correct 4 ms 5068 KB Output is correct
15 Correct 4 ms 5068 KB Output is correct
16 Correct 4 ms 5068 KB Output is correct
17 Correct 4 ms 5068 KB Output is correct
18 Correct 4 ms 5068 KB Output is correct
19 Correct 4 ms 5068 KB Output is correct
20 Correct 4 ms 5068 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 10564 KB Output is correct
2 Correct 94 ms 10604 KB Output is correct
3 Correct 76 ms 10680 KB Output is correct
4 Correct 75 ms 10580 KB Output is correct
5 Correct 70 ms 10576 KB Output is correct
6 Correct 98 ms 15648 KB Output is correct
7 Correct 83 ms 13964 KB Output is correct
8 Correct 93 ms 13120 KB Output is correct
9 Correct 79 ms 12228 KB Output is correct
10 Correct 74 ms 10680 KB Output is correct
11 Correct 82 ms 10684 KB Output is correct
12 Correct 73 ms 10696 KB Output is correct
13 Correct 73 ms 10664 KB Output is correct
14 Correct 58 ms 10564 KB Output is correct
15 Correct 52 ms 10452 KB Output is correct
16 Correct 39 ms 9784 KB Output is correct
17 Correct 45 ms 10944 KB Output is correct
18 Correct 50 ms 10984 KB Output is correct
19 Correct 48 ms 10892 KB Output is correct
20 Correct 56 ms 10952 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5068 KB Output is correct
2 Correct 4 ms 5068 KB Output is correct
3 Incorrect 4 ms 5072 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 10684 KB Output is correct
2 Correct 76 ms 10640 KB Output is correct
3 Incorrect 92 ms 12228 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5000 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 5000 KB Output isn't correct
2 Halted 0 ms 0 KB -