Compilare: main.cpp: In function 'void compute_v()': main.cpp:12:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i=1;1<<i<=v.size()-1;i++){ | ~~~~^~~~~~~~~~~~ main.cpp:13:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int j=1;j+(1<<i)-1<=v.size()-1;j++){ | ~~~~~~~~~~^~~~~~~~~~~~