Submission #501284

#	Time	Username	Problem	Language	Result	Execution time	Memory
501284		RGBB	Genetics (BOI18_genetics)	C++14	100 / 100	1304 ms	56708 KiB

genetics

#include <iostream>
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
using namespace std;

const int MAX=4100;

int n,m,k;

bool flag[MAX],check[MAX][MAX];

bitset<MAX>col[MAX][2];
bitset<MAX>temp;

int cnt;
vector<int>ind;
string inp[MAX];

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n>>m>>k;
    ind=vector<int>(n);
    for(int i=0;i<n;i++){
        cin>>inp[i];
        ind[i]=i;
    }
    random_shuffle(ind.begin(),ind.end());
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(inp[ind[i]][j]=='A'){
                col[i][0][j]=1;
                col[i][1][j]=1;
            }
            else if(inp[ind[i]][j]=='G')col[i][0][j]=1;
            else if(inp[ind[i]][j]=='T')col[i][1][j]=1;
        }
    }
    for(int i=0;i<n;i++){
        if(flag[i])continue;
        bool villain=true;
        for(int j=0;j<n;j++){
            if(j==i)continue;
            if(check[i][j])continue;
            check[j][i]=true;
            if(((col[i][0]^col[j][0])|(col[i][1]^col[j][1])).count()!=k){
                villain=false;
                flag[j]=true;
                break;
            }
        }
        if(villain){
            cout<<ind[i]+1<<"\n";
            return 0;
        }
    }
}

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:47:69: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |             if(((col[i][0]^col[j][0])|(col[i][1]^col[j][1])).count()!=k){
      |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

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