lbd.cpp: In function 'int main()': lbd.cpp:90: warning: suggest explicit braces to avoid ambiguous 'else' lbd.cpp:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result lbd.cpp:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result lbd.cpp:80: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lbd.cpp:87: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lbd.cpp:100: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result