更新了许多

最美苹果数.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main(){
+	int N1;
+	int N2;
+	int N3;
+	int Number; 
+	cin >>N1>>N2>>N3;
+	if(N3<=2 || N2<=1 || N1<=0){
+		cout <<"-1";
+	}
+	else{
+		if(N2>=N3){
+			Number=N2-N3+1;
+			if(N1>=N3-1){
+				Number=N2-N3+1+N1-N3+2;
+			}
+			else{
+				cout <<Number;
+			}
+		}
+		else{
+			if(N1>=N2){
+				Number=N1-N2+1;
+			}
+			else{
+				cout <<Number;
+			}	
+		}
+	}
+	return 0;
+}