#include <stdio.h>
#include <stdlib.h>
 
 
int linear_search(int a[],int n,int x){
int ret=-1;
for(int i=0;i<n;i++){
if(a[i]==x) ret=i;
}
return ret;
}
 
 
 
int main(void) {
int n,x,i;
scanf("%d %d",&n,&x);
int *a;
a=(int*)malloc(sizeof(int)*n);
if(a==NULL){
printf("ERROR\n");
return -1;
}
for(i=0;i<n;i++){
scanf("%d",&a[i]);
}
int ans;
ans=linear_search(a,n,x);
if(ans!=-1) {printf("%d",ans+1);}
if(ans==-1){printf("not found");}
free(a);
	return 0;
}

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NiAzCjIgNSA2IDQgMyAx

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2 5 6 4 3 1