Update: Rename folder name to XSMOJ

XSMOJ/特殊求和.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+#include <iomanip>
+using namespace std;
+int main(){
+	int a,b,sum=0,flag=0;
+	cin >>a;
+	for(int i=1;i<=a;i++){
+		b=i;
+		while(b){
+			if(b%10==7){
+				sum+=b;
+				flag=1;
+				break;
+			}
+			b/=10;
+		}
+		if(flag==1){
+				continue;
+			}
+			else{
+				if(i/7==0){
+					sum+=i;
+				} 
+			}
+			flag=0;
+	}
+	cout <<sum;
+	return 0;
+}
+
+