trei.cpp: In function 'int main()': trei.cpp:16: warning: suggest explicit braces to avoid ambiguous 'else' trei.cpp:22: warning: suggest explicit braces to avoid ambiguous 'else' trei.cpp:31: warning: suggest explicit braces to avoid ambiguous 'else' trei.cpp:36: warning: suggest explicit braces to avoid ambiguous 'else' trei.cpp:5: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trei.cpp:6: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trei.cpp:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result trei.cpp:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result