Submission #1154122

#	Time	Username	Problem	Language	Result	Execution time	Memory
1154122		tegshee	Genetics (BOI18_genetics)	C++20	100 / 100	204 ms	17336 KiB

genetics

#include<bits/stdc++.h>
#define int long long
#define ss second
#define ff first
#define pb push_back
using namespace std;
const int mod=1e9+7;
const int mxn=5000;
const int b=13;
int n,m,k;
int s[mxn],sum,p[70][mxn],h[mxn];
string a[mxn];
signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
    cin>>n>>m>>k;
    sum=0;
    for(int i=1;i<=n;i++)
    {cin>>a[i];
		a[i]=" "+a[i];
    	h[0]=0;
    	for(int j=1; j<=m; j++)
    	{h[j]=(h[j-1]*b%mod+a[i][j]-'A')%mod;
     	}
    	s[i]=h[m];
    	sum+=s[i];
    	for(int j=1; j<=m; j++)
    	{p[a[i][j]-'A'][j]+=s[i];
		  }
    }
	for(int i=1; i<=n; i++)
	{int t=0;
		for(int j=1; j<=m; j++)
		{t+=p[a[i][j]-'A'][j]-s[i];
		}
		if(t==(sum-s[i])*(m-k)){cout<<i; return 0;}
    }
}

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