Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main(){int64_t n,k,P,t,o,w,r=-1,p=1l<<31,i;std::ifstream{"proc.in"}>>n>>k>>P;for(;p/=2;r+=t/2<n-k|o+t<2*n-k?p:0)for(t=o=i=0;++i<=P;)w=(r+p)/i,o+=w&1,t+=w&~1;std::ofstream{"proc.out"}<<r+1;} ^ main.cpp: In function 'int main()': main.cpp:2:94: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses] main(){int64_t n,k,P,t,o,w,r=-1,p=1l<<31,i;std::ifstream{"proc.in"}>>n>>k>>P;for(;p/=2;r+=t/2<n-k|o+t<2*n-k?p:0)for(t=o=i=0;++i<=P;)w=(r+p)/i,o+=w&1,t+=w&~1;std::ofstream{"proc.out"}<<r+1;} ~~~^~~~