Compilare: main.cpp: In member function 'bool treapta::operator<(const treapta&) const': main.cpp:13:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(n==b.n) ^ main.cpp: In function 'int main()': main.cpp:25:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scara3.in","r",stdin); ^ main.cpp:26:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("scara3.out","w",stdout); ^