SOLUTION OF URI 1132

//  1132  (Mahmud_Jamil) BRUR
// 

Multiples of 13

 #include<stdio.h>
int main()
{
int x,y,i,sum=0;
scanf("%d %d",&x,&y);
if(y>x){
for(i=x;i<=y;i++){
    if(i%13!=0)
        sum=sum+i;
    }
}
else if(x>y){
    for(i=y;i<=x;i++){
        if(i%13!=0)
        sum=sum+i;
        }
    }
    printf("%d\n",sum);
return 0;
}