Compilare: user.c: In function ‘main’: user.c:14:5: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(v, 0, sizeof v); ^ user.c:14:5: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c:11:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &t); ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:16:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ user.c:38:27: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(left == 0 && 1LL * a * b / i < rez) ^