### File Recover Testing

Below given code is for filrtest spoj or file recover testing spoj.

Hint:- For solving this question you should Know

**z-function .**If you know z-function of a string then its very to calculate the number of string in given length.#include <bits/stdc++.h> using namespace std; int *Z_function(char s[]) { int *z; z = (int*)calloc((strlen(s)+9),sizeof(int)); int l=0,r=0,n = strlen(s); z[0] = n; for(int i=1;i<n;i++) { if(i<=r) z[i] = min(r-i+1 , z[i-l]); while(i+z[i] < n && s[z[i]] == s[i+z[i]]) z[i]++; if(i+z[i]-1 > r) l = i, r = i+ z[i] - 1; } return z; } int main() { int n; while(1) { char s[1000009]; scanf("%d",&n); scanf("%s",s); if(n==-1) return 0; int *z; int size = strlen(s); if(n<size) { printf("0\n"); continue; } z = (int*)calloc((size+9),sizeof(int)); z = Z_function(s); int m = 0; for(int i=1;i<size;i++) { if(i+z[i] == size) m = max(m , z[i]); } int total; total = (n-m)/(size - m); printf("%d\n",total); } return 0; }