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- #include <bits/stdc++.h>
- using namespace std;
- ifstream fin("afin.in");
- ofstream fout("afin.out");
- int main()
- {
- int a, b, i, n, x=97, v[30];
- char s[10001];
- fin>>a>>b;
- fin>>s;
- n=strlen(s);
- for(i=0; i<=25; i++)
- {
- char ch=x;
- v[int(ch)-97]=i;
- x++;
- }
- for(i=0; i<n; i++)
- {
- int nr=(a*v[int(s[i])-97]+b)%26;
- fout<<char(nr+97);
- }
- return 0;
- }
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