oj.uz

Submission #59961

# Submission time Handle Problem Language Result Execution time Memory
59961 2018-07-23T11:33:10 Z Flugan42 Duathlon (APIO18_duathlon) C++14
0 / 100
 469 ms 16092 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll,ll> ii;
typedef vector<ii> vii;
#define rep(i,a,b) for(int i = a; i < b; i++)
#define per(i,a,b) for(int i = a; i >= b; i--)
#define inf 1000000000000000000
#define sz(x) (ll)(x).size()

ll n,m,u,v,cur;
vector<vi> edges;
vi _,vis,tree,vis2,cnt;

void dfs(ll a){
  tree.push_back(a);
  rep(i,0,sz(edges[a])){
    ll b = edges[a][i];
    if (vis[b] == 0) {
      vis[b] = cur;
      dfs(b);
    }
  }
}

ll dfs2(ll a){
  vis2[a] = 1;
  if (cnt[a] != -1) return cnt[a];
  ll ans = 1;
  rep(i,0,sz(edges[a])){
    ll b = edges[a][i];
    if (vis2[b] == 0) {
      ans += dfs2(b);
    }
  }
  return cnt[a] = ans;
}

ll center(ll a){
  ll ans = 0,big = 0;
  rep(i,0,sz(edges[a])){
    ll b = edges[a][i];
    if (cnt[b] > cnt[a]) { continue; }
    ans += (sz(tree)-1-cnt[b])*cnt[b];
    big += cnt[b];
  }
  ans += big*(sz(tree)-1-big);
  return ans;
}

int main(){
  cin >> n >> m;
  edges.assign(n,_);
  rep(i,0,m){
    cin >> u >> v; u--; v--;
    edges[u].push_back(v);
    edges[v].push_back(u);
  }
  vis.assign(n,0);
  cur = 1; ll res = 0;
  rep(i,0,n){
    if (vis[i] != 0) continue;
    tree.clear();
    if (vis[i] == 0) { vis[i] = cur; dfs(i); cur++; }
    vis2.assign(n,0); cnt.assign(n,-1); dfs2(tree[0]);
    rep(i,0,sz(tree)){ res += center(tree[i]); cout << res << " " << i << endl; }
  }
  cout << res << endl;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 248 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 248 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 434 ms 16092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 16092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 469 ms 16092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 16092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 456 ms 16092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 248 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 248 KB Output isn't correct
2 Halted 0 ms 0 KB -