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  1. #include <bits/stdc++.h>
  2. #define pb push_back
  3. #define INF 0x3f3f3f3f
  4. using namespace std;
  5.  
  6. void solve() {
  7. 	int msk[32];
  8. 	for(int i = 0 ; i < 32 ; i++) {
  9. 		msk[i] = 0;
  10. 		msk[i] |= (1<<i);
  11. 	}
  12. 	int n, m; cin >> n >> m;
  13. 	assert(n >= 1 and n <= 20);
  14. 	assert(m >= 0 and m <= (n*(n-1))/2);
  15. 	for(int i = 0 ; i < m ; i++) {
  16. 		int u, v; cin >> u >> v;
  17. 		assert(u >= 1 and u <= n);
  18. 		assert(v >= 1 and v <= n);
  19. 		u--, v--;
  20. 		msk[u] |= (1<<v);
  21. 		msk[v] |= (1<<u);
  22. 	}
  23.  
  24. 	int ans = INF;
  25. 	for(int i = 1 ; i < (1<<n) ; i++) {
  26. 		int cur_mask = 0;
  27. 		for(int cnt = 0 ; cnt < n ; cnt++) if(i&(1<<cnt)) cur_mask |= msk[cnt];
  28. 		if(__builtin_popcount(cur_mask) == n) ans = min(ans, __builtin_popcount(i));
  29. 	}
  30.  
  31. 	assert(ans >= 1 and ans <= n);
  32. 	cout << ans << "\n";
  33. }
  34.  
  35. int main() {
  36. 	int t; cin >> t; while(t--) solve();
  37. }
Runtime error #stdin #stdout #stderr 0s 3464KB
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Standard input is empty
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Standard output is empty
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prog: prog.cpp:14: void solve(): Assertion `m >= 0 and m <= (n*(n-1))/2' failed.
https://ideone.com/xfg01b
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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