plaja.cpp: In function 'int main()': plaja.cpp:92: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result plaja.cpp:93: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result plaja.cpp: In function 'void Solve()': plaja.cpp:120: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result plaja.cpp:124: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result plaja.cpp: In function 'void ReadData()': plaja.cpp:147: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result plaja.cpp:152: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result plaja.cpp:154: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result plaja.cpp:158: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result