Compilare: main.cpp: In function 'void precalc()': main.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0; i<euler.size()-1; i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i=2; i<=euler.size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:77:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int i = 1; (1 << i)<=euler.size(); i++) | ~~~~~~~~^~~~~~~~~~~~~~ main.cpp:79:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int j = 0; j+(1 << i)-1<euler.size(); j++) | ~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:85:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int j=0; j<pz[i].size(); j++) | ~^~~~~~~~~~~~~ main.cpp:87:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | if(j!=pz[i].size()-1) | ~^~~~~~~~~~~~~~~~