func_code_string: #include <bits/stdc++.h>   using namespace std;   int main(void) {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n;     cin >> n;     string a[n], b[n];     map<string, int> m;     for (int i = 0; i < n; ++i) {       cin >> a[i];       ++m[a[i]];     }     for (int i = 0; i < n; ++i) {       cin >> b[i];       --m[b[i]];     }     int ans = 0;     vector<string> v = { XXXL ,  XXXS ,  XXL ,  XXS ,  XL ,  XS ,  S ,  L ,  M };     ans = (abs(m[ XXXL ]) + abs(m[ XXXS ])) / 2;     ans += (abs(m[ XXL ]) + abs(m[ XXS ])) / 2;     ans += (abs(m[ XL ]) + abs(m[ XS ])) / 2;     ans += (abs(m[ S ]) + abs(m[ L ]) + abs(m[ M ])) / 2;     cout << ans;   }   