subgeom.cpp: In function 'int solve()': subgeom.cpp:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result subgeom.cpp:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result subgeom.cpp: In function 'int main()': subgeom.cpp:49: warning: unused variable 'i' subgeom.cpp:49: warning: unused variable 'j' subgeom.cpp:49: warning: unused variable 'k' subgeom.cpp:50: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result subgeom.cpp:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result subgeom.cpp:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result