Language: C

main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}

Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      | ^~~~
main.c: In function 'main':
main.c:1:1: error: type of 'a' defaults to 'int' [-Wimplicit-int]
main.c:1:1: error: type of 'b' defaults to 'int' [-Wimplicit-int]
main.c:1:1: error: type of 'c' defaults to 'int' [-Wimplicit-int]
main.c:1:17: error: implicit declaration of function 'gets' [-Wimplicit-function-declaration]
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                 ^~~~
main.c:1:23: error: expected ';' before ')' token
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                       ^
      |                       ;
main.c:1:23: error: expected expression before ')' token
main.c:1:25: error: implicit declaration of function 'scnaf' [-Wimplicit-function-declaration]
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                         ^~~~~
main.c:1:50: error: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                                                  ^~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'puts'
  +++ |+#include <stdio.h>
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
main.c:1:85: warning: missing terminating " character
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                                                                                     ^
main.c:1:85: error: missing terminating " character
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                                                                                     ^~~~~~~~~~~~~~~~~~~
main.c:1:82: error: 'YES' undeclared (first use in this function)
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                                                                                  ^~~
main.c:1:82: note: each undeclared identifier is reported only once for each function it appears in
main.c:1:85: error: expected ')' at end of input
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                                                      ~                              ^
      |                                                                                     )
main.c:1:23: error: expected declaration or statement at end of input
    1 | main(a,b,c){for(gets());scnaf("%d%d%d",&a,&b,&c);puts((a+b-c&&b+c-a&&c+a-b)?"NO":YES"))a*=a,b*=b,c*=c;}
      |                       ^