delete pics to save space

2.839.cpp

@@ -0,0 +1,24 @@
+#include<iostream>
+using namespace std;
+bool solve(int& w)
+{
+	int w1,w2,d1,d2;
+	bool b1=1,b2=1;
+	cin>>w1>>d1>>w2>>d2;
+	if(!w1) b1=solve(w1);
+	if(!w2) b2=solve(w2);
+	w=w1+w2;
+	return b1&b2&&(w1*d1==w2*d2);
+}
+int main()
+{
+	int t,w;
+	cin>>t;
+	while(t--)
+	{
+		if(solve(w)) cout<<"YES"<<endl;
+		else cout<<"NO"<<endl;
+		if(t) cout<<endl;
+	}
+	return 0;
+}