func_code_string: #include <bits/stdc++.h>   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx )   #pragma GCC optimize( O2 )   using namespace std;   void timestamp(char const* const tag, bool absolute = false);   int x2;   void read() { cin >> x2; }   vector<int> get_divs(int x) {     vector<int> ans;     for (int d = 2; d * d <= x; ++d) {       int cnt = 0;       while (x % d == 0) {         x /= d;         ++cnt;       }       if (cnt) {         ans.push_back(d);       }     }     if (x > 1) {       ans.push_back(x);     }     return ans;   }   void solve() {     int ans = 10000000;     for (int p1 : get_divs(x2)) {       for (int x1 = max(p1, x2 - p1) + 1; x1 <= x2; ++x1) {         for (int p0 : get_divs(x1)) {           int x0 = max(p0, x1 - p0) + 1;           ans = min(ans, x0);         }       }     }     cout << ans << endl;   }   void timestamp(char const* const tag, bool absolute) {     static double last = 0;     double now = (static_cast<double>(clock()) / CLOCKS_PER_SEC) * 1000;     if (absolute) {       ;     } else {       ;       last = now;     }   }   int main() {     std::ios_base::sync_with_stdio(false);     std::cin.tie(nullptr);     timestamp( start );     read();     timestamp( read() );     solve();     timestamp( solve() );     timestamp( total , true);     return 0;   }   