Compilare: user.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<bits/stdc++.h> ^~~~~~ user.cpp:2:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){int64_t N;std::ifstream("fetite.in")>>N;std::ofstream("fetite.out")<<N+N-(1<<((int)log2(N)+1)+1);} ^ user.cpp: In function ‘int main()’: user.cpp:2:101: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] main(){int64_t N;std::ifstream("fetite.in")>>N;std::ofstream("fetite.out")<<N+N-(1<<((int)log2(N)+1)+1);} ~~~~~~~~~~~~~~~~^~