Compilare: main.cpp: In function 'void precalculate()': main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int i = 2; i <= euler.size(); i ++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void sparseTabel()': main.cpp:42:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i = 0; i < euler.size(); i ++) | ~~^~~~~~~~~~~~~~ main.cpp:48:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int j = 0; j + (1 << i) < euler.size(); j ++) | ~~~~~~~~~~~~~^~~~~~~~~~~~~~