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Submission #262238

# Submission time Handle Problem Language Result Execution time Memory
262238 2020-08-12T14:10:27 Z Rouge_Hugo Duathlon (APIO18_duathlon) C++14
66 / 100
 208 ms 33144 KB 
#include<bits/stdc++.h>
#define fi first
#define ll long long
#define pb push_back
#define se second
using namespace std;
int n,m;
ll re=0;
int szz=0;
const int N=200009;
vector<pair<int,int>>v[N];
vector<pair<int,int>>v1[N];
ll cnt=1,t[N],num[N],a[N],low[N],bridge[N],b[N],par[N],vis[N],sz[N],bo[N];
int tt=0;
vector<int>nd;
void dfs (int x,int p)
{
    nd.pb(x);
    vis[x]=1;
    low[x]=num[x]=++tt;
    for(auto it:v[x])
    {
        if (num[it.first]==0)
            dfs(it.first,x);
        if (num[x]<low[it.first])
            bridge[it.second]=1;
        if (it.first!=p)
            low[x]=min(low[x],low[it.first]);
    }
        if(low[x] == num[x]) {
            int w=1;
        while(nd.back() != x) {
            par[nd.back()] = cnt;
            nd.pop_back();w++;
        }
        par[nd.back()] = cnt;
        nd.pop_back();
        bo[cnt]=w;
        cnt++;
    }
}
void dfs2(int x,int p)
{
    vis[x]=1;
    for(auto it:v[x])
    {
        if(it.fi==p)continue;
        if (!vis[it.first])
            dfs2(it.first,x);
        if (bridge[it.second]==1)
        {
            v1[par[x]].push_back({par[it.fi],x});
            v1[par[it.fi]].push_back({par[x],it.fi});
        }
    }
}
void solve(int x,int p)
{
    vis[x]=1;
    for(auto it:v1[x])
    {
        if(it.fi==p)continue;
        solve(it.fi,x);
        sz[x]+=sz[it.fi];
    }
    sz[x]+=bo[x];
}
void go (int x,int p,ll up)
{
    vis[x]=1;
    sz[x]-=bo[x];
    if(bo[x]>=3)
        re+=bo[x]*(bo[x]-1)*(bo[x]-2);
    re+=(up)*((bo[x])-1)*((bo[x])-1)*2;
    re+=(sz[x])*(bo[x]-1)*(bo[x]-1)*2;int u=0;
    for(auto it:v1[x])
    {
        if(it.fi==p)
        {
            u=it.se;
        }
        if(it.fi==p)continue;
        re+=2*(t[x]-a[it.se])*sz[it.fi]*(bo[x]);
        re+=2*a[it.se]*sz[it.fi];
        a[it.se]+=sz[it.fi];
        t[x]+=sz[it.fi];
        go(it.fi,x,up+bo[x]+sz[x]-sz[it.fi]);
    }
    re+=2*up*bo[x]*(sz[x]-a[u]);
    re+=2*up*a[u];
}
int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    scanf("%d %d", &n, &m);
    int x,y;
    for(int i=0; i<m; i++)
    {
        scanf("%d %d", &x, &y);
        v[x].push_back({y,i});
        v[y].push_back({x,i});
    }
    memset (vis,0,sizeof vis);
    for(int i=1;i<n+1;i++)
    {
        if(vis[i])continue;
        dfs(i,-1);
    }
    memset (vis,0,sizeof vis);
    for(int i=1;i<n+1;i++)
    {
        if(vis[i])continue;
        dfs2(i,-1);
    }
    memset (vis,0,sizeof vis);
    for(int i=1;i<cnt;i++)
    {
        if(vis[i])continue;
        solve(i,0);
    }
    re=0;
    memset (vis,0,sizeof vis);
    for(int i=1;i<cnt;i++)
    {
        if(vis[i])continue;
        go(i,0,0);
    }
    cout<<re;
}

Compilation message

count_triplets.cpp: In function 'int main()':
count_triplets.cpp:95:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   95 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
count_triplets.cpp:99:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   99 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11392 KB Output is correct
2 Correct 7 ms 11392 KB Output is correct
3 Correct 7 ms 11392 KB Output is correct
4 Correct 7 ms 11392 KB Output is correct
5 Correct 7 ms 11392 KB Output is correct
6 Correct 7 ms 11392 KB Output is correct
7 Correct 8 ms 11392 KB Output is correct
8 Incorrect 7 ms 11392 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11392 KB Output is correct
2 Correct 7 ms 11392 KB Output is correct
3 Correct 7 ms 11392 KB Output is correct
4 Correct 7 ms 11392 KB Output is correct
5 Correct 7 ms 11392 KB Output is correct
6 Correct 7 ms 11392 KB Output is correct
7 Correct 8 ms 11392 KB Output is correct
8 Incorrect 7 ms 11392 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 123 ms 28172 KB Output is correct
2 Correct 122 ms 28016 KB Output is correct
3 Correct 138 ms 27256 KB Output is correct
4 Correct 147 ms 28276 KB Output is correct
5 Correct 125 ms 24692 KB Output is correct
6 Correct 149 ms 27124 KB Output is correct
7 Correct 129 ms 24824 KB Output is correct
8 Correct 142 ms 25848 KB Output is correct
9 Correct 135 ms 23928 KB Output is correct
10 Correct 141 ms 24204 KB Output is correct
11 Correct 115 ms 22392 KB Output is correct
12 Correct 111 ms 22264 KB Output is correct
13 Correct 98 ms 22520 KB Output is correct
14 Correct 102 ms 22264 KB Output is correct
15 Correct 84 ms 22008 KB Output is correct
16 Correct 111 ms 21624 KB Output is correct
17 Correct 14 ms 16128 KB Output is correct
18 Correct 14 ms 16256 KB Output is correct
19 Correct 14 ms 16000 KB Output is correct
20 Correct 15 ms 15956 KB Output is correct
21 Correct 13 ms 15872 KB Output is correct
22 Correct 17 ms 15872 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 11496 KB Output is correct
2 Correct 9 ms 11520 KB Output is correct
3 Correct 10 ms 11520 KB Output is correct
4 Correct 8 ms 11520 KB Output is correct
5 Correct 8 ms 11520 KB Output is correct
6 Correct 9 ms 11520 KB Output is correct
7 Correct 10 ms 11520 KB Output is correct
8 Correct 9 ms 11520 KB Output is correct
9 Correct 11 ms 11520 KB Output is correct
10 Correct 8 ms 11520 KB Output is correct
11 Correct 8 ms 11520 KB Output is correct
12 Correct 8 ms 11520 KB Output is correct
13 Correct 8 ms 11520 KB Output is correct
14 Correct 9 ms 11520 KB Output is correct
15 Correct 8 ms 11520 KB Output is correct
16 Correct 8 ms 11520 KB Output is correct
17 Correct 14 ms 11520 KB Output is correct
18 Correct 10 ms 11520 KB Output is correct
19 Correct 14 ms 11520 KB Output is correct
20 Correct 8 ms 11520 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 143 ms 26360 KB Output is correct
2 Correct 138 ms 26360 KB Output is correct
3 Correct 208 ms 26360 KB Output is correct
4 Correct 144 ms 26360 KB Output is correct
5 Correct 143 ms 26360 KB Output is correct
6 Correct 152 ms 33144 KB Output is correct
7 Correct 202 ms 29556 KB Output is correct
8 Correct 164 ms 28664 KB Output is correct
9 Correct 162 ms 27728 KB Output is correct
10 Correct 141 ms 26344 KB Output is correct
11 Correct 134 ms 26360 KB Output is correct
12 Correct 123 ms 26360 KB Output is correct
13 Correct 144 ms 26360 KB Output is correct
14 Correct 139 ms 25720 KB Output is correct
15 Correct 123 ms 25080 KB Output is correct
16 Correct 72 ms 22648 KB Output is correct
17 Correct 80 ms 25192 KB Output is correct
18 Correct 89 ms 25228 KB Output is correct
19 Correct 100 ms 25568 KB Output is correct
20 Correct 95 ms 25192 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 11512 KB Output is correct
2 Correct 8 ms 11520 KB Output is correct
3 Correct 8 ms 11520 KB Output is correct
4 Correct 26 ms 11392 KB Output is correct
5 Correct 8 ms 11392 KB Output is correct
6 Correct 16 ms 11392 KB Output is correct
7 Correct 9 ms 11392 KB Output is correct
8 Correct 8 ms 11392 KB Output is correct
9 Correct 9 ms 11392 KB Output is correct
10 Correct 9 ms 11392 KB Output is correct
11 Correct 9 ms 11392 KB Output is correct
12 Correct 9 ms 11520 KB Output is correct
13 Correct 8 ms 11520 KB Output is correct
14 Correct 8 ms 11520 KB Output is correct
15 Correct 9 ms 11520 KB Output is correct
16 Correct 12 ms 11392 KB Output is correct
17 Correct 16 ms 11520 KB Output is correct
18 Correct 9 ms 11392 KB Output is correct
19 Correct 21 ms 11392 KB Output is correct
20 Correct 8 ms 11392 KB Output is correct
21 Correct 8 ms 11520 KB Output is correct
22 Correct 10 ms 11520 KB Output is correct
23 Correct 15 ms 11520 KB Output is correct
24 Correct 10 ms 11520 KB Output is correct
25 Correct 8 ms 11424 KB Output is correct
26 Correct 8 ms 11392 KB Output is correct
27 Correct 8 ms 11392 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 26360 KB Output is correct
2 Correct 157 ms 26104 KB Output is correct
3 Correct 166 ms 24680 KB Output is correct
4 Correct 159 ms 23100 KB Output is correct
5 Correct 141 ms 21624 KB Output is correct
6 Correct 133 ms 21088 KB Output is correct
7 Correct 121 ms 20676 KB Output is correct
8 Correct 109 ms 20344 KB Output is correct
9 Correct 121 ms 20216 KB Output is correct
10 Correct 122 ms 20088 KB Output is correct
11 Correct 117 ms 19960 KB Output is correct
12 Correct 123 ms 19832 KB Output is correct
13 Correct 116 ms 19576 KB Output is correct
14 Correct 116 ms 20980 KB Output is correct
15 Correct 200 ms 28404 KB Output is correct
16 Correct 207 ms 27256 KB Output is correct
17 Correct 167 ms 27252 KB Output is correct
18 Correct 160 ms 26232 KB Output is correct
19 Correct 155 ms 23164 KB Output is correct
20 Correct 157 ms 23104 KB Output is correct
21 Correct 160 ms 23160 KB Output is correct
22 Correct 142 ms 22512 KB Output is correct
23 Correct 121 ms 21696 KB Output is correct
24 Correct 148 ms 24696 KB Output is correct
25 Correct 149 ms 24948 KB Output is correct
26 Correct 206 ms 23792 KB Output is correct
27 Correct 144 ms 23800 KB Output is correct

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11392 KB Output is correct
2 Correct 7 ms 11392 KB Output is correct
3 Correct 7 ms 11392 KB Output is correct
4 Correct 7 ms 11392 KB Output is correct
5 Correct 7 ms 11392 KB Output is correct
6 Correct 7 ms 11392 KB Output is correct
7 Correct 8 ms 11392 KB Output is correct
8 Incorrect 7 ms 11392 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 11392 KB Output is correct
2 Correct 7 ms 11392 KB Output is correct
3 Correct 7 ms 11392 KB Output is correct
4 Correct 7 ms 11392 KB Output is correct
5 Correct 7 ms 11392 KB Output is correct
6 Correct 7 ms 11392 KB Output is correct
7 Correct 8 ms 11392 KB Output is correct
8 Incorrect 7 ms 11392 KB Output isn't correct
9 Halted 0 ms 0 KB -