diff --git a/swea/3431.py b/swea/3431.py
new file mode 100644
index 0000000..3eb4f04
--- /dev/null
+++ b/swea/3431.py
@@ -0,0 +1,11 @@
+n=int(input())
+
+for i in range(1,n+1):
+	istr="#"+str(i)
+	l,u,x=map(int,input().split())
+	if u<x:
+		print(istr,-1)
+	elif l-1<x:
+		print(istr,0)
+	else:
+		print(istr,(l-x))