Compilare: main.cpp: In function 'void preprocess_log()': main.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<index_info>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i = 1; i <= euler_tour.size() - 1; i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<index_info>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(int j = 1; j <= euler_tour.size() - (1 << i); j++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:51:80: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 51 | if(euler_tour[D[i - 1][j]].level < euler_tour[D[i - 1][j + (1 << i - 1)]].level) | ~~^~~ main.cpp:54:48: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] 54 | D[i][j] = D[i - 1][j + (1 << i - 1)]; | ~~^~~