Submission #240591

#	Time	Username	Problem	Language	Result	Execution time	Memory
240591		dsjong	Genetics (BOI18_genetics)	C++14	74 / 100	1551 ms	53364 KiB

genetics

#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
using namespace std;
int n, m, k;
string a[5000];
bitset<4105>bs[4105];
bool check(int x){
	for(int i=1;i<=n;i++){
		if(i==x) continue;
		int cnt=0;
		for(int j=0;j<m;j++){
			if(a[x][j]!=a[i][j]) cnt++;
		}
		if(cnt!=k) return false;
	}
	return true;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	if(n<=100){
		for(int i=1;i<=n;i++){
			if(check(i)){
				cout<<i;
				return 0;
			}
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=0;j<m;j++){
			bs[i][j]=(a[i][j]=='A');
			assert(a[i][j]=='A' || a[i][j]=='C');
		}
		//cout<<bs[i]<<endl;
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			if(i==j) continue;
			bitset<4105> tmp=(bs[i]^bs[j]);
			//cout<<i<<" "<<j<<" "<<tmp.count()<<endl;
			if(tmp.count()!=k) goto hell;
		}
		cout<<i;
		return 0;
		hell:;
	}
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(tmp.count()!=k) goto hell;
       ~~~~~~~~~~~^~~

• Subtask 1: 27 / 27
• Subtask 2: 19 / 19
• Subtask 3: 28 / 28
• Subtask 4: 0 / 26