/in/foo.c: In function 'main':
/in/foo.c:21:20: error: expected ')' before ';' token
     scanf("%d", &n2;
                    ^
/in/foo.c:38:1: error: expected ';' before '}' token
 }
 ^
/in/foo.c:15:19: warning: unused variable 'b' [-Wunused-variable]
     int a[10000], b[10000];
                   ^