Wrong Subtraction

Author: seikhchilli

977A.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+
+int main(){
+  int n, k;
+  cin>>n;
+  cin>>k;
+
+  for(int i = 0; i < k; i++){
+    if(n%10 == 0){
+      n /= 10;
+    }
+    else{
+      n--;
+    }
+  }
+  cout<<n;
+}