func_code_string: #include <bits/stdc++.h>   using namespace std;   long long ax, ay, bx, by, cx, cy, flag = 0;   long long f(long long x1, long long y1, long long x2, long long y2) {     long long res = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);     return res;   }   bool isColinear() {     long long res1 = (by - ay) * (cx - bx);     long long res2 = (cy - by) * (bx - ax);     if (res1 == res2)       return true;     else       return false;   }   int main() {     cin >> ax >> ay >> bx >> by >> cx >> cy;     if (isColinear() == true)       flag = 0;     else {       long long dis1 = f(ax, ay, bx, by);       long long dis2 = f(bx, by, cx, cy);       if (dis1 == dis2)         flag = 1;       else         flag = 0;     }     if (flag == 1)       printf( Yes n );     else       printf( No n );   }   