omizi.cpp: In function 'void BuildTree(int)': omizi.cpp:18: warning: comparison between signed and unsigned integer expressions omizi.cpp: In function 'void Compute(int)': omizi.cpp:75: warning: comparison between signed and unsigned integer expressions omizi.cpp:77: warning: suggest explicit braces to avoid ambiguous 'else' omizi.cpp: In function 'int main()': omizi.cpp:84: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result omizi.cpp:85: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result omizi.cpp:88: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result omizi.cpp:90: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result omizi.cpp:94: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result omizi.cpp:100: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result