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- 2017-10-28 17:27:13 @
typedef unsigned long long ULL;
const ULL base = 131;
const int mxn = 110005;
char s[mxn];
ULL hash[mxn], power[mxn];
void deal_hash(){
power[0] = 1;
hash[0] = 0;
for(int i = 1; i <= mxn-5; i++) power[i] = power[i-1] * base;
for(int i = 1; i <= strlen(s+1); i++) hash[i] = hash[i-1] * base + (s[i]-'0');
}
ULL get_hash1(int l, int r, ULL Hash[]){
return Hash[r] - Hash[l-1]*power[r-l+1];
}
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