Submission #69206

#	Time	Username	Problem	Language	Result	Execution time	Memory
69206		mirbek01	Port Facility (JOI17_port_facility)	C++17	10 / 100	3509 ms	852 KiB

port_facility

# include <bits/stdc++.h>

using namespace std;

int n, a[22], b[22], ans;

int main(){
      cin >> n;

      for(int i = 0; i < n; i ++){
            cin >> a[i] >> b[i];
            a[i] --, b[i] --;
      }

      for(int mask = 0; mask < (1 << n); mask ++){
            vector <int> v, add[n + n], del[n + n];
            for(int i = 0; i < n; i ++){
                  if((1 << i) & mask){
                        add[a[i]].push_back(i);
                        del[b[i]].push_back(i);
                  }
            }
            bool ok = 1;
            for(int i = 0; i < n * 2; i ++){
                  for(int j : add[i])
                        v.push_back(j);
                  for(int j : del[i]){
                        if(v.back() != j){
                              ok = 0;
                              break;
                        }
                        v.pop_back();
                  }
                  add[i].clear();
                  del[i].clear();
            }
            for(int i = 0; i < n; i ++){
                  if(!((1 << i) & mask)){
                        add[a[i]].push_back(i);
                        del[b[i]].push_back(i);
                  }
            }
            for(int i = 0; i < n * 2; i ++){
                  for(int j : add[i])
                        v.push_back(j);
                  for(int j : del[i]){
                        if(v.back() != j){
                              ok = 0;
                              break;
                        }
                        v.pop_back();
                  }
            }
            ans += ok;
      }

      cout << ans << endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22