func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1e9 + 7;   const bool debugger1 = 0;   const bool debugger2 = 0;   const bool debugger3 = 0;   const bool debugger4 = 0;   const bool debugger5 = 0;   const long long MOD = 1e9 + 7, P = 1e9 + 7;   long long n;   long long sca, scb;   std::vector<pair<long long, long long> > liczby;   int main() {     scanf( %lld , &n);     liczby.resize(2 * n);     for (int i = 0; i < n; i++)       scanf( %lld , &liczby[i].first), liczby[i].second = 1;     for (int i = 0; i < n; i++)       scanf( %lld , &liczby[n + i].first), liczby[n + i].second = 2;     for (int i = 0; i < 2 * n; i++) liczby[i].first *= (-1);     sort(liczby.begin(), liczby.end());     for (int i = 0; i < liczby.size(); i++) {       if (liczby[i].second == 1) {         if (i % 2 == 0) sca -= liczby[i].first;       } else if (i % 2 == 1)         scb -= liczby[i].first;     }     printf( %lld , sca - scb);     return 0;   }   