Compilare: user.cpp: In function ‘int main()’: user.cpp:43:13: warning: unused variable ‘ggg’ [-Wunused-variable] int ggg = solve(xf - xc, yf - yc, zf - zc, val); ^~~ user.cpp:30:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare2.in", "r", stdin); ^ user.cpp:31:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare2.out", "w", stdout); ^ user.cpp:35:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld %lld", &xf, &yf, &zf); ^