Borderou de evaluare (job #495787)

Eroare de compilare: user.c:11:5: warning: conflicting types for built-in function 'log' [enabled by default] user.c: In function 'backtrack': user.c:23:7: error: 'for' loop initial declarations are only allowed in C99 mode user.c:23:7: note: use option -std=c99 or -std=gnu99 to compile your code user.c:31:16: error: 'lsb' undeclared (first use in this function) user.c:31:16: note: each undeclared identifier is reported only once for each function it appears in user.c: In function 'main': user.c:51:3: error: 'for' loop initial declarations are only allowed in C99 mode user.c:67:1: warning: control reaches end of non-void function [-Wreturn-type]