delete pics to save space

1.2520.cpp

@@ -0,0 +1,21 @@
+#include<cstdio>
+typedef long long LL;
+LL T,a,b,x,y,c;
+LL gcd(LL a,LL b) { return b==0?a:gcd(b,a%b); }
+inline bool chk(LL x,LL y) { return x%c==0&&y%c==0; }
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%lld",&T);
+	while(T-->0)
+	{
+		scanf("%lld%lld%lld%lld",&a,&b,&x,&y);
+		c=2*gcd(a,b);
+		if(a==0&&b==0&&!(x==0&&y==0)) { puts("N"); continue; }
+		if(chk(x,y)||chk(x+a,y+b)||chk(x+b,y+a)||chk(x+a+b,y+a+b)) puts("Y");
+		else puts("N");
+	}
+	return 0;
+}