Submission #554598

#	Time	Username	Problem	Language	Result	Execution time	Memory
554598		new_acc	Genetics (BOI18_genetics)	C++14	100 / 100	381 ms	67532 KiB

genetics

#include<bits/stdc++.h>
#define fi first
#define se second
#define pitem item*
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<ll> vl;
const int N=1e6+10;
const int SS=1<<19;
const int INFi=2e9;
const ll INFl=1e13;
const ll mod=998244353;
const ll mod2=1e9+7;
const ll mod3=1000696969;
const ll p=70032301;
const ull p2=913;
const int L=20;
string s[N];
int n,m,k;
ll nh[N][4],pot[N];
int xd(char a){
	if(a=='A') return 0;
	if(a=='C') return 1;
	if(a=='G') return 2;
	return 3;
}
void solve(){
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++) cin>>s[i];
	pot[0]=1;
	for(int i=1;i<=n;i++) pot[i]=(pot[i-1]*p)%mod;
	for(int i=1;i<=n;i++)
		for(int j=0;j<m;j++) nh[j][xd(s[i][j])]+=pot[i];
	for(int i=0;i<m;i++) 
		for(int j=0;j<4;j++) nh[i][j]%=mod;
	ll sum=0;
	for(int i=1;i<=n;i++) sum+=pot[i];
	sum%=mod;
	for(int i=1;i<=n;i++){
		ll aktsum=sum-pot[i];
		(aktsum+=mod)%=mod;
		(aktsum*=(ll)k)%=mod;
		ll __curr=0;
		for(int j=0;j<m;j++){
			for(int l=0;l<4;l++){
				if(xd(s[i][j])==l) continue;
				__curr+=nh[j][l];
			}
		}
		__curr%=mod;
		if(__curr==aktsum){
			cout<<i<<"\n";
			return;
		}
	}	
}
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0);
	solve();
}

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