joker.cpp: In function 'int main()': joker.cpp:25: warning: unused variable 'j' joker.cpp:25: warning: unused variable 'ok2' joker.cpp:25: warning: unused variable 'ind' joker.cpp:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result joker.cpp:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result joker.cpp:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result joker.cpp:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result joker.cpp: In function 'int bs(int, int, int)': joker.cpp:20: warning: control reaches end of non-void function