Submission #539294

#	Time	Username	Problem	Language	Result	Execution time	Memory
539294		cig32	Examination (JOI19_examination)	C++17	0 / 100	729 ms	1048576 KiB

examination

#include "bits/stdc++.h"
using namespace std;
const int MAXN = 2e5 + 10;
const int MOD = 1e9 + 7;
#define int unsigned long long
#define ll __int128
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
vector<int> adj[MAXN];
vector<int> adj2[MAXN];
int dist[MAXN];
bool cmp(int a, int b) {
  return dist[a] < dist[b];
}
void solve(int tc) {
  int n, m, q;
  n = 100000;
  q = 100000;
  m = 200000;
  //cin >> n >> m >> q;
  int p[n];
  for(int i=0; i<n; i++) p[i] = i;
  
  for(int i=0; i<m; i++) {
    int s, e;
    s = rnd(0, n - 2);
    e = rnd(s + 1, n - 1);
    //cin >> s >> e;
    s--, e--;
    adj[s].push_back(e);
    adj2[e].push_back(s);
  }
  for(int i=0; i<n; i++) {
    dist[i] = 0;
    for(int j=0; j<adj2[i].size(); j++) { 
      dist[i] = max(dist[i], dist[adj2[i][j]] + 1);
    }
  }
  sort(p, p + n, cmp);
  int pos[n];
  for(int i=0; i<n; i++) pos[p[i]] = i;
  vector<int> adj3[n];
  for(int i=0; i<n; i++) {
    for(int x: adj[i]) {
      adj3[pos[i]].push_back(pos[x]);
    }
  }
  for(int i=0; i<n; i++) {
    adj[i].clear();
    adj2[i].clear();
    adj[i] = adj3[i];
  }
 
  int dp[n][n / 64 + 2];
  signed ps[n][n / 64 + 2]; // my memory is in danger
  for(int i=0; i<n; i++) {
    for(int j=0; j<n/64 + 2; j++) {
      dp[i][j] = 0;
    }
    dp[i][i / 64] = (1ull << (i & 63));
  }
  for(int i=0; i<n; i++) {
    ps[i][0] = __builtin_popcount(dp[i][0]);
    for(int j=1; j<n/64 + 2; j++) ps[i][j] = ps[i][j-1] + __builtin_popcount(dp[i][j]);
  }
  for(int i=0; i<n; i++) {
    for(int j=0; j<adj2[i].size(); j++) { 
      for(int k=0; k<n/64 + 2; k++) { // O(m * n / 64). is this ka chang ti
        dp[i][k] |= dp[adj2[i][j]][k];
      }
    }
  }
  int dist2[n];
  for(int i=0; i<n; i++) dist2[pos[i]] = dist[i];
  for(int i=0; i<n; i++) dist[i] = dist2[i];
  for(int i=0; i<n; i++) cout << p[i] << " ";
  cout << "\n";
  for(int i=0; i<n; i++) cout << dist[i] << " ";
  cout << "\n";
  int minus[n+1];
  for(int i=0; i<=n; i++) minus[i] = 0;
  return;
  while(q--) {
    int t, y;
    cin >> t >> y;
    t--;
    t = pos[t];
    vector<int> e(y);
    for(int j=0; j<y; j++) {
      cin >> e[j];
      e[j]--;
      e[j] = pos[e[j]];
      minus[dist[e[j]]]++;
    }
    int cur_mex = 0;
    for(int i=0; i<=y; i++) {
      int cnt = 0;
    }
    int64_t one = dist[t];
    one -= cur_mex;
    cout << "dist[t] = " << dist[t] << ", mex = " << cur_mex << ", res = " << one << '\n';
    for(int j=0; j<y; j++) {
      minus[dist[e[j]]]--;
    }
  }
}
int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
} 
 
/*
12 17 10
1 2
2 3
3 4
1 5
2 6
3 7
4 8
5 6
6 7
7 8
5 9
6 10
7 11
8 12
9 10
10 11
11 12
6 3 1 7 12
3 7 1 2 3 4 5 6 7
11 3 1 3 5
9 2 1 9
8 4 1 2 3 4
1 1 1
12 0
10 3 1 6 10
11 8 2 3 5 6 7 9 10 11
8 7 2 3 4 5 6 7 8
*/

Compilation message (stderr)

examination.cpp: In function 'void solve(long long unsigned int)':
examination.cpp:99:11: warning: unused variable 'cnt' [-Wunused-variable]
   99 |       int cnt = 0;
      |           ^~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57