Compilare: main.cpp: In function 'int main()': main.cpp:49:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j].size()<=k[j]) ~~~~~~~~~~~^~~~~~ main.cpp:59:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j].size()<=k[j]) ~~~~~~~~~~~^~~~~~ main.cpp:61:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[j][k[j]].y<mn) main.cpp:72:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<(v[i].size())-1;++j) ~^~~~~~~~~~~~~~~~ main.cpp:84:38: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] y=v[i][j].x+(1<<i+1)-1; ~^~ main.cpp:28:21: warning: unused variable 'mn' [-Wunused-variable] long long n,i,j,mn,t; ^~