Submission #1170810

#	Time	Username	Problem	Language	Result	Execution time	Memory
1170810		SmuggingSpun	Making Friends on Joitter is Fun (JOI20_joitter2)	C++20	1 / 100	1397 ms	452 KiB

joitter2

#include<bits/stdc++.h>
#define taskname "B"
using namespace std;
typedef long long ll;
int n, m;
namespace sub1{
    void solve(){
        vector<ll>g(n, 0), _g;
        for(int _ = 0; _ < m; _++){
            int u, v;
            cin >> u >> v;
            g[--u] |= 1LL << --v;
            _g = g;
            while(true){
                bool flag = false;
                for(int i = 0; i < n; i++){
                    for(int j = 0; j < n; j++){
                        if(1LL << j & _g[i]){
                            for(int k = 0; k < n; k++){
                                if(k != i && k != j && (1LL << j & _g[k]) && (1LL << k & _g[j]) && ((_g[i] >> ll(k) & 1LL) == 0)){
                                    _g[i] |= 1LL << k;
                                    flag = true;
                                }
                            }
                        }
                    }
                }
                if(!flag){
                    break;
                }
            }
            int ans = 0;
            for(int i = 0; i < n; i++){
                ans += __builtin_popcountll(_g[i]);
            }
            cout << ans << "\n";
        }
    }
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
    cin >> n >> m;
    if(n <= 50){
        sub1::solve();
    }
}

Compilation message (stderr)

joitter2.cpp: In function 'int main()':
joitter2.cpp:43:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 0 / 16
• Subtask 3: 0 / 83