Compilare: user.cpp: In function ‘int baga()’: user.cpp:22: warning: unused variable ‘k’ user.cpp: In function ‘void solve()’: user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp:48: warning: comparison between signed and unsigned integer expressions user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp:40: warning: unused variable ‘k’ user.cpp: In function ‘void read_data()’: user.cpp:71: warning: unused variable ‘j’ user.cpp:71: warning: unused variable ‘k’ user.cpp:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:87: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:88: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result