Submission #321422

#	Time	Username	Problem	Language	Result	Execution time	Memory
321422		Nayna	Genetics (BOI18_genetics)	C++14	47 / 100	602 ms	35828 KiB

genetics

#include <bits/stdc++.h>
 
using namespace std;
 
const int mxn = 3e5+5;
 #define  FAST  ios_base::sync_with_stdio(0);cout.tie(0)
typedef long long ll;
bool vis[4105];
int pre[4105][2];
vector<string>arr;

int main()
{
   // input;
   // output;
    FAST;
    int n, m, k;
    cin >> n >> m >> k;
    vector<bitset<4105> >v;
 
    for(int i = 0; i < n; i++)
    {
        string s;
        cin >> s;
        
        bitset<4105>tmp;
       // cout << tmp << '\n';
        for(int r = 0; r < m; r++)
        {
            if(s[r]=='A') tmp[r] = '1', s[r] = '1';
            else s[r] = '0';
            pre[r][s[r]-'0']++;
        }
        arr.push_back(s);
        v.push_back(tmp);
    }   
    //for(int i = 0; i < m; i++) cout << pre[i][0] << ' ' << pre[i][1] << '\n';
    int ans = -1;
    for(int i = 0; i < n; i++)
    {
        int cnt = 0;
        if(vis[i]) continue;
        int got = 0;
        for(int r = 0; r < m; r++) {
            if(arr[i][r]=='0') got+=pre[r][1];
            else got+=pre[r][0];
        }
        if(got!= k*(n-1)) continue;
        for(int r = 0; r < n; r++)
        {
            if(i==r) continue;
            bitset<4105>tmp = v[i]^v[r];
            int x = tmp.count();
            if(x==k) cnt++;
            else {
                vis[r] = 1;
                break;
            }
        }
        if(cnt==n-1)
        {
            ans = i+1;
            break;
        }
    }
    cout << ans << '\n';
    return 0;
}

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