oj.uz

Submission #535246

# Submission time Handle Problem Language Result Execution time Memory
535246 2022-03-09T18:20:08 Z NaimSS 007 (CEOI14_007) C++14
66.6667 / 100
 229 ms 16996 KB 
#include <bits/stdc++.h>
#define ld long double
#define endl "\n"
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define ms(v,x) memset(v,x,sizeof(v))
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, a, b) for(int i = b-1; i>=a ; i--)
#define trav(a, x) for(auto& a : x)
#define allin(a , x) for(auto a : x)
#define Unique(v) sort(all(v));v.erase(unique(all(v)),v.end());
#define sz(v) ((int)v.size())
using namespace std;
typedef vector<int> vi;
#define y1 abacaba
//#define left oooooopss
#define db(x) cerr << #x <<" == "<<x << endl;
#define db2(x,y) cerr<<#x <<" == "<<x<<", "<<#y<<" == "<<y<<endl;
#define db3(x,y,z) cerr << #x<<" == "<<x<<", "<<#y<<" == "<<y<<", "<<#z<<" == "<<z<<endl;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
std::mt19937 rng((int) std::chrono::steady_clock::now().time_since_epoch().count());
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
inline ll mod(ll n, ll m ){ ll ret = n%m; if(ret < 0) ret += m; return ret; }
ll gcd(ll a, ll b){return (b == 0LL ? a : gcd(b, a%b));}
ll exp(ll b,ll e,ll m){
  b%=m;
  ll ans = 1;
  for (; e; b = b * b % m, e /= 2)
      if (e & 1) ans = ans * b % m;
  return ans;
}

// debug:
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T){ 
  cerr << ' ' << H; 
  dbg_out(T...); 
}
#ifdef LOCAL
#define dbg(...) cerr<<"(" << #__VA_ARGS__<<"):" , dbg_out(__VA_ARGS__) , cerr << endl
#else
#define dbg(...) 42
#endif
//

const int N = 200100;
    int n,m;

vi g[N];

vi dista(int a){
  vector<int> d(n+2);
  rep(i,1,n+1)d[i] = 1e9;
  d[a] = 0;
  priority_queue<pii,vector<pii>,greater<pii>> pq;
  pq.push(pii(d[a],a));
  while(!pq.empty()){
    auto t = pq.top();pq.pop();
    if(t.ff != d[t.ss])continue;
    int v = t.ss;
    for(auto to : g[v])if(d[to] > d[v] + 1){
      d[to] = d[v] + 1;
      pq.push(pii(d[to],to));
    }
  }
  return d;
}

int s,d,a,b;
vi d1,d2;
int vis[N];
int getcommon(int ini){
  rep(i,0,N)vis[i]=0;
  queue<int> q;
  q.push(ini);
  vis[ini] = 1;
  int res=0;
  while(!q.empty()){
    int v = q.front();
    q.pop();
    res=max(res,d1[ini] - d1[v]);
    for(auto to : g[v])
    if(!vis[to] && d1[to] == d1[v] - 1 && d2[to] == d2[v] - 1){
      vis[to]=1;q.push(to);
    }
  }
  return res;
}

int32_t main(){
    fastio;
    cin >> n >> m;
    cin >> s >> d >> a >> b;
    assert(a!=b);
    while(m--){
      int u,v;
      cin >> u >> v;
      g[u].pb(v);
      g[v].pb(u);
    }
    d1 = dista(a),d2=dista(b);
    int A = d1[d] - d1[s];
    int B = d2[d] - d1[s];
    if(A!=B){
      cout << max(min(A,B),-1) << endl;
    }else{
      cout << max(A - ((A + getcommon(s) < getcommon(d)) ? 1 : 0),-1) << endl;
    }
    // math -> gcd it all
    // Did u check N=1? Did you switch N,M?
}

Subtask #1
13.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5728 KB Output is correct
2 Partially correct 3 ms 4940 KB Partially correct
3 Correct 3 ms 5708 KB Output is correct
4 Correct 3 ms 5708 KB Output is correct
5 Correct 3 ms 5708 KB Output is correct
6 Correct 3 ms 5708 KB Output is correct
7 Correct 3 ms 5708 KB Output is correct
8 Correct 3 ms 5708 KB Output is correct
9 Correct 3 ms 5708 KB Output is correct
10 Correct 4 ms 5708 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 5708 KB Output is correct
13 Correct 3 ms 5708 KB Output is correct
14 Correct 3 ms 5708 KB Output is correct
15 Correct 3 ms 5708 KB Output is correct
16 Correct 3 ms 5708 KB Output is correct
17 Correct 3 ms 5708 KB Output is correct
18 Correct 5 ms 5708 KB Output is correct
19 Correct 3 ms 5708 KB Output is correct
20 Correct 4 ms 5708 KB Output is correct
21 Incorrect 3 ms 4940 KB Output isn't correct
22 Correct 3 ms 5836 KB Output is correct
23 Correct 4 ms 5836 KB Output is correct
24 Correct 4 ms 5836 KB Output is correct

Subtask #2
53.666667 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 7400 KB Output is correct
2 Correct 28 ms 8128 KB Output is correct
3 Correct 32 ms 7520 KB Output is correct
4 Correct 27 ms 8220 KB Output is correct
5 Correct 24 ms 6476 KB Output is correct
6 Correct 19 ms 6732 KB Output is correct
7 Correct 26 ms 7720 KB Output is correct
8 Correct 27 ms 7756 KB Output is correct
9 Correct 40 ms 8028 KB Output is correct
10 Correct 124 ms 12460 KB Output is correct
11 Correct 52 ms 9348 KB Output is correct
12 Correct 68 ms 10184 KB Output is correct
13 Correct 55 ms 9636 KB Output is correct
14 Correct 47 ms 8960 KB Output is correct
15 Correct 57 ms 10308 KB Output is correct
16 Correct 66 ms 9804 KB Output is correct
17 Correct 56 ms 10020 KB Output is correct
18 Correct 59 ms 10052 KB Output is correct
19 Correct 88 ms 11140 KB Output is correct
20 Correct 154 ms 14044 KB Output is correct
21 Correct 88 ms 12224 KB Output is correct
22 Correct 84 ms 11444 KB Output is correct
23 Correct 78 ms 11284 KB Output is correct
24 Correct 74 ms 11844 KB Output is correct
25 Correct 82 ms 11540 KB Output is correct
26 Correct 77 ms 10448 KB Output is correct
27 Correct 94 ms 12228 KB Output is correct
28 Correct 100 ms 12024 KB Output is correct
29 Correct 120 ms 12696 KB Output is correct
30 Correct 162 ms 14684 KB Output is correct
31 Correct 98 ms 12932 KB Output is correct
32 Correct 101 ms 12024 KB Output is correct
33 Partially correct 91 ms 11416 KB Partially correct
34 Correct 105 ms 12468 KB Output is correct
35 Correct 82 ms 12264 KB Output is correct
36 Correct 86 ms 12488 KB Output is correct
37 Correct 117 ms 12612 KB Output is correct
38 Correct 117 ms 13120 KB Output is correct
39 Correct 119 ms 13260 KB Output is correct
40 Correct 159 ms 14844 KB Output is correct
41 Correct 229 ms 16996 KB Output is correct