Cod sursa(job #3319126)

Utilizator gabi072Sanda Gabriel gabi072 Data 30 octombrie 2025 17:15:07
Problema Abc2 Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.71 kb
#include<bits/stdc++.h>
using namespace std;
ifstream fin("abc2.in");
ofstream fout("abc2.out");
unordered_set<int> st;
const int base = 3;
const int mod = 1e9+7;
string sir,c;
int main() {
    fin>>sir;
    int ws=0;
    while(fin>>c){
        if(!ws) ws=c.size();
        int h=0;
        for(char ch:c)
            h=(1ll*h*base+ch)%mod;
        st.insert(h);
    }
    int p=1;
    for(int i=0;i<ws;++i)
        p=1ll*p*base%mod;
    int h=0;
    for(int i=0;i<ws;++i)
        h=(1ll*h*base+sir[i])%mod;
    long long ap=0;
    if(st.count(h)) ++ap;
    for(int i=ws;i<(int)sir.size();++i){
        h=(1ll*h*base+sir[i]-1ll*sir[i-ws]*p)%mod;
        if(h<0) h+=mod;
        if(st.count(h)) ++ap;
    }
    fout<<ap;
}