Compilare: user.c: In function ‘solve’: user.c:11:9: warning: unused variable ‘x’ [-Wunused-variable] int x = strlen(formula[i]); ^ user.c: In function ‘main’: user.c:50:9: warning: format ‘%s’ expects argument of type ‘char *’, but argument 2 has type ‘char (*)[256]’ [-Wformat=] scanf(" %s",&formula[i]); ^ user.c:59:18: warning: unused variable ‘l’ [-Wunused-variable] char l = 0, s = 0, S = 0; ^ user.c:45:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "r", stdin); ^ user.c:46:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "w", stdout); ^ user.c:47:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.c:49:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &linie[i], &coloana[i]); ^ user.c:50:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %s",&formula[i]); ^