Compilare: user.c: In function ‘main’: user.c:14:3: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(ult, -1, sizeof ult); ^ user.c:14:3: 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%d", &n, &m); ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.c:16:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &st[i], &dr); ^