func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 10, INF = 0x3f3f3f3f, MOD = 1e9 + 7;   struct P {     long long x, y;     P() {}     P(long long x, long long y) : x(x), y(y) {}     P rotate() { return P(-y, x); }     P operator-(const P& rhs) const { return P(x - rhs.x, y - rhs.y); }     long long operator*(const P& rhs) const { return x * rhs.x + y * rhs.y; }     bool operator==(const P& rhs) const { return x == rhs.x && y == rhs.y; }   };   bool judge(P& u, P& v) {     if (v == P(0, 0)) return u == P(0, 0);     long long w = v.x * v.x + v.y * v.y;     return u * v % w == 0 && u * v.rotate() % w == 0;   }   P a, b, c;   int main() {     ios_base::sync_with_stdio(0);     while (cin >> a.x >> a.y >> b.x >> b.y >> c.x >> c.y) {       bool ok = false;       for (int i = 0; i < 4; ++i) {         P d = b - a;         if (judge(d, c)) {           ok = true;           break;         }         a = a.rotate();       }       cout << (ok ?  YES  :  NO ) <<   n ;     }     return 0;   }   