#include<iostream> using namespace std; int main() { double a,b; cin>>a>>b; int k=(int)(a/b); double r=a-b*k; cout<<r; return 0; }
#include<iostream> using namespace std; int main() { double a,b; cin>>a>>b; int k=(int)(a/b); double r=a-b*k; cout<<r; return 0; }