Submission #116824

#	Time	Username	Problem	Language	Result	Execution time	Memory
116824		hungcung	Lozinke (COCI17_lozinke)	C++14	40 / 100	1088 ms	1024 KiB

lozinke

#include<bits/stdc++.h>
using namespace std;
int n,dem;
string s[20005],s1,s2;
const long long mod=1e9+7,base=31;
long long pOw[15],hAsH[15];
long long getHash(long long i,long long j){
	return(hAsH[j]-hAsH[i-1]*pOw[j-i+1]+mod*mod)%mod;
}
int main(){
	scanf("%d",&n);
	for(int i=0;i<n;i++){
		cin>>s[i];
	}
	int ans=0;
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			int leni=s[i].length(),lenj=s[j].length(),ktra=0;
			bool check=false;
			if(leni<lenj){
				s2=s[i];
				s1=s[j];
				leni=s1.length();
				lenj=s2.length();
			}else if(leni>=lenj){
				s1=s[i];
				s2=s[j];
			}
			pOw[0]=1ll;
			s1=" "+s1;
			for(int k=1;k<=leni;k++){
				pOw[k]=pOw[k-1]*base%mod;
			}for(int k=1;k<=leni;k++){
				hAsH[k]=(hAsH[k-1]*base+s1[k]-'a'+1)%mod;
			}
			s2=" "+s2;
			for(int k=1;k<=lenj;k++){
				ktra=(ktra*base+s2[k]-'a'+1)%mod;
			}for(int k=1;k<=leni-lenj+1;k++){
				if(ktra==getHash(k,k+lenj-1)){
					check=true;
					break;
				}
			}
			if(check==true){
				if(leni==lenj) ans+=2;
				else ans++;
			}
		}
	}
	printf("%d",ans);
}

Compilation message (stderr)

lozinke.cpp: In function 'int main()':
lozinke.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~

• Subtask 1: 40 / 100