Eroare de compilare: user.cpp: In function ‘void read()’: user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result /tmp/cc97C5BI.o: In function `solve()': user.cpp:(.text+0x5c1): undefined reference to `dist(long long, long long, long long, long long)' user.cpp:(.text+0x625): undefined reference to `dist(long long, long long, long long, long long)' user.cpp:(.text+0x7f4): undefined reference to `dist(long long, long long, long long, long long)' user.cpp:(.text+0x858): undefined reference to `dist(long long, long long, long long, long long)' user.cpp:(.text+0xa27): undefined reference to `dist(long long, long long, long long, long long)' /tmp/cc97C5BI.o:user.cpp:(.text+0xa8b): more undefined references to `dist(long long, long long, long long, long long)' follow collect2: ld returned 1 exit status