delete pics to save space

1.2197.cpp

@@ -0,0 +1,19 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+int T,n,sg,x;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d",&T);
+	while(T-->0)
+	{
+		scanf("%d",&n);
+		n--; scanf("%d",&sg);
+		while(n-->0) { scanf("%d",&x); sg^=x; }
+		puts(sg?"Yes":"No");
+	}
+	return 0;
+}