Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i=0; i < graf[a].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void init()': main.cpp:30:20: 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=3; i <= euler.size()-1; i++) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void gen()': main.cpp:36:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=1; i < euler.size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp:38:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i=1; (1<<i)<euler.size(); i++) | ~~~~~~^~~~~~~~~~~~~ main.cpp:40:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int j=1; j+(1<<i)<=euler.size(); j++) | ~~~~~~~~^~~~~~~~~~~~~~