Compilare: user.c: In function ‘main’: user.c:175:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(f,"%d",sol); ^ user.c: In function ‘citire’: user.c:49:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,32767,f); ^ user.c:73:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,32767,f); ^ user.c:93:9: warning: attempt to free a non-heap object ‘s’ [-Wfree-nonheap-object] free(s); ^