Help me in solving CPPFALL166 problem

My issue

answer is correct but still showing error

My code

#include <iostream>
using namespace std;

int main() {
	// your code goes here
    int c,x,y;
    cin>>c>>x>>y;
    cout<<(x*(c-y))<<endl;
    
}

Learning course: Learn Programming and Problem Solving using C++
Problem Link: https://www.codechef.com/learn/course/sit-cpp-fall/SITFALL28/problems/CPPFALL166