func_code_string: #include <bits/stdc++.h>   using namespace std;   const int dr[] = {-1, 0, 1, 0, -1, -1, 1, 1};   const int dc[] = {0, -1, 0, 1, -1, 1, -1, 1};   long long ax, ay, bx, by, cx, cy;   long long dist(long long x1, long long y1, long long x2, long long y2) {     return ((x1 - x2) * (x1 - x2)) + ((y1 - y2) * (y1 - y2));   }   int main() {     cin >> ax >> ay >> bx >> by >> cx >> cy;     if (dist(ax, ay, bx, by) != dist(bx, by, cx, cy)) {       cout <<  No n ;       return 0;     }     if (ax - bx == bx - cx && ay - by == by - cy)       cout <<  No n ;     else if (ax - cx == cx - bx && ay - cy == cy - by)       cout <<  No n ;     else if (bx - ax == ax - cx && by - ay == ay - cy)       cout <<  No n ;     else if (bx - cx == cx - ax && by - cy == cy - ay)       cout <<  No n ;     else if (cx - ax == ax - cx && cy - ay == ay - cy)       cout <<  No n ;     else if (cx - bx == bx - cx && cy - by == by - cy)       cout <<  No n ;     else       cout <<  Yes n ;     return 0;   }   