Compilare: main.cpp: In function 'int main()': main.cpp:41:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (i = 0; i < euler.size(); ++i) | ~~^~~~~~~~~~~~~~ main.cpp:45:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (j = 1; (1<<j) <= euler.size(); ++j) | ~~~~~~~^~~~~~~~~~~~~~~ main.cpp:46:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (i = 0; i+(1<<j)-1 < euler.size(); ++i) | ~~~~~~~~~~~^~~~~~~~~~~~~~