Compilare: main.cpp: In function 'int main()': main.cpp:110:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for ( int i = 0; i < euler.size(); i++ ) | ~~^~~~~~~~~~~~~~ main.cpp:112:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 112 | for ( int p = 1; (1 << p) <= euler.size(); p++ ) { | ~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:113:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for ( int i = 0; i + (1 << p) <= euler.size(); i++ ) | ~~~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:117:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 117 | for ( int i = 2; i < euler.size(); i++ ) | ~~^~~~~~~~~~~~~~