Submission #473449

#	Time	Username	Problem	Language	Result	Execution time	Memory
473449		Blobo2_Blobo2	Genetics (BOI18_genetics)	C++14	0 / 100	13 ms	3068 KiB

genetics

/*
Editor: Abdelrahman Hossam
Nickname: Blobo2_Blobo2
IOI next year isA :)
*/
/*#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.2,popcnt,abm,mmx,avx2,tune=native")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-funroll-all-loops,-fpeel-loops,-funswitch-loops")*/

#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define endl "\n"
#define all(v)  v.begin(),v.end()
#define gen(arr,n,nxt)  generate(arr,arr+n,nxt)
#define Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty ios_base::sync_with_stdio(false);cin.tie(0);
#define EPS 0.00000001
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>

//s.order_of_key(x)
//s.find_by_order(idx)

const int mo=1e9+7,INF=1e18;
int nxt(){int x;cin>>x;return x;}
int rand(int l, int r){
  static mt19937
  rng(chrono::steady_clock::now().time_since_epoch().count());

  uniform_int_distribution<int> ludo(l, r);
  return ludo(rng);
}

signed main(){
    Blobo2_el_7akim_elly_3ayz_yro7_IOI_w_3ayz_yakol_jilaty
    //freopen("in.txt","r",stdin);
    int n=nxt(),m=nxt(),k=nxt();
    ordered_set st;
    vector<pair<string,int> >v;
    for(int i=0;i<n;i++){
        string s;
        cin>>s;
        st.insert(i);
        v.push_back({s,i});
    }
    while(st.size()>1){
        int x = rand(0,st.size()-1);
        x = *st.find_by_order (x);
        string s = v[x].first;
        vector<int>rem;
        int idx= 0;
        for(auto y:st){
            if(y == x)continue;
            int c = 0;
            for(int j=0;j<m;j++)
                c += v[y].first[j] != s[j];
            if(c != k){
                if(idx == 0)
                    rem.push_back(x),idx++;
                rem.push_back(y);
            }
        }
        if(!rem.size()){
            cout<<x+1;
            return 0;
        }
        for(int i=0;i<rem.size();i++){
            st.erase(rem[i]);
            //cout<<rem[i]<<' ';
        }
        //cout<<endl;
    }
    cout<<(*st.begin())+1;
    return 0;
}

Compilation message (stderr)

genetics.cpp:29:24: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   29 | const int mo=1e9+7,INF=1e18;
      |                        ^~~~
genetics.cpp: In function 'int main()':
genetics.cpp:72:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for(int i=0;i<rem.size();i++){
      |                     ~^~~~~~~~~~~

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