func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<long long> A;   long long B[1000000] = {0};   bool cmp(long long x, long long y) { return x > y; }   int main() {     A.clear();     string S1, S2;     cin >> S1;     for (long long i = 0; i < S1.size(); i++) A.push_back(S1[i] -  0 );     cin >> S2;     for (long long i = 0; i < S2.size(); i++) B[i] = S2[i] -  0 ;     sort(B, B + S2.size(), cmp);     long long find = 0;     for (long long i = 0; i < A.size(); i++)       if (A[i] < B[find]) A[i] = B[find++];     for (long long i = 0; i < A.size(); i++) cout << A[i];   }   