Submission #1097369

#	Time	Username	Problem	Language	Result	Execution time	Memory
1097369		vjudge1	Genetics (BOI18_genetics)	C++17	100 / 100	269 ms	33620 KiB

genetics

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int n,m,k;
ll conststring[5000],Sum,pos[70][5000];
string xau[5000];
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
#define rand rd
ll Rand(ll l,ll h)
{
    assert(l <= h);
    return l + rd() * 1LL * rd() % (h - l + 1);
}
void Solve()
{
    for(int i=1;i<=n;i++)
    {
     ll tong=0;
     for(int j=1;j<=m;j++)
     {
        tong+=pos[xau[i][j]-'A'][j]-conststring[i];
     }
     if(tong==(Sum-conststring[i])*(m-k))
      {
        cout<<i;
        return;
      }
    }
}
void Input()
{
    cin>>n>>m>>k;
    Sum=0;
    for(int i=1;i<=n;i++)
    {
     cin>>xau[i];
     xau[i]=" "+xau[i];
     conststring[i]=abs(Rand(78,1000000));
     Sum+=conststring[i];
     for(int j=1;j<=m;j++)
    {
     pos[xau[i][j]-'A'][j]+=conststring[i];
    }
    }
}
int main()
{
 Input();
 Solve();
}

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