Language: C

p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}

Compiler output:
main.c:1:3: warning: multi-character character constant [-Wmultichar]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |   ^~~~~
main.c:1:1: warning: data definition has no type or storage class
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'p' [-Wimplicit-int]
main.c:1:12: warning: multi-character character constant [-Wmultichar]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |            ^~~~~
main.c:1:10: warning: data definition has no type or storage class
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |          ^
main.c:1:10: error: type defaults to 'int' in declaration of 't' [-Wimplicit-int]
main.c:1:19: warning: data definition has no type or storage class
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                   ^
main.c:1:19: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:21: error: type defaults to 'int' in declaration of 'x' [-Wimplicit-int]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                     ^
main.c:1:23: error: type defaults to 'int' in declaration of 'j' [-Wimplicit-int]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                       ^
main.c:1:25: error: return type defaults to 'int' [-Wimplicit-int]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                         ^~~~
main.c: In function 'main':
main.c:1:25: error: type of 'i' defaults to 'int' [-Wimplicit-int]
main.c:1:77: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                             ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
main.c:1:77: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                             ^~~~~
main.c:1:77: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:99: error: implicit declaration of function 'memset' [-Wimplicit-function-declaration]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                                                   ^~~~~~
main.c:1:1: note: include '<string.h>' or provide a declaration of 'memset'
  +++ |+#include <string.h>
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
main.c:1:99: warning: incompatible implicit declaration of built-in function 'memset' [-Wbuiltin-declaration-mismatch]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                                                   ^~~~~~
main.c:1:99: note: include '<string.h>' or provide a declaration of 'memset'
main.c:1:109: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                                                             ^~~~~~
main.c:1:109: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:109: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:109: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:186: error: 'k' undeclared (first use in this function)
    1 | p['   '];t['   '];n,x,j;main(i){for(;i++<1e6;)for(x=i;x<1e6;p[x+=i]=1);for(;scanf("%d%d",&n,&x),n;memset(t,!printf(x<2?"NA\n":"%d\n",x),4e6)){for(;n--;)for(i=-scanf("%d",t);++i<x;)t[i+*k]|=t[i];for(;p[x]|!t[x];x--);}}
      |                                                                                                                                                                                          ^
main.c:1:186: note: each undeclared identifier is reported only once for each function it appears in