Compilare: user.cpp: In function ‘void read()’: user.cpp:8: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘long long int*’ user.cpp:8: warning: format ‘%ld’ expects type ‘long int*’, but argument 3 has type ‘long long int*’ user.cpp:7: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve()’: user.cpp:12: warning: unused variable ‘i’ user.cpp:13: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result