Help me in solving LPYAS151 problem

help
,
1

My issue

fix correct code

My code

#include <stdio.h>

int main() {
	int num;
	int N;
	int R;
	scanf("%d",&num);
for(int i=0;i<=10;i++){
    N=num%10;
    R = R+N*N*N;
    
}if(num=R){
printf("Armstrong\n");
}else{
    printf("Not Armstrong");
}
return 0;
}

Learning course: Algorithmic Problem Solving
Problem Link: https://www.codechef.com/learn/course/klu-problem-solving/KLUPS00A/problems/LPYAS151