Compilare: main.cpp:7:21: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] const int umax=1<<20+3; ~~^~ main.cpp: In function 'int main()': main.cpp:196:26: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if(lim&(1<<j)==0) continue; ~~~~~~^~~ main.cpp:201:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<act.size();++k) ~^~~~~~~~~~~ main.cpp:203:33: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if(i&(1<<act[k])==0) continue; ~~~~~~~~~~~^~~