func_code_string: #include <bits/stdc++.h>   using namespace std;   const int cstMax = 1e6 + 100;   const int cstAlphaSize = 26;   char a[cstMax], b[cstMax];   int c[cstMax][cstAlphaSize];   long long getGcd(long long a, long long b) {     long long r;     while (b != 0) r = a % b, a = b, b = r;     return a;   }   int main() {     long long n, m;     long long alen, blen, gcd, lcm;     long long cycleValue, nCicles;     while (cin >> n >> m) {       cin >> a >> b;       alen = strlen(a);       blen = strlen(b);       gcd = getGcd(alen, blen);       lcm = alen / gcd * blen;       cycleValue = lcm;       nCicles = n * alen / lcm;       memset(c, 0, sizeof c);       for (int i = (0); (i) < int(alen); ++i) ++c[i % gcd][int(a[i] -  a )];       for (int i = (0); (i) < int(blen); ++i)         cycleValue -= c[i % gcd][int(b[i] -  a )];       cout << (cycleValue * nCicles) << endl;     }     return 0;   }   