Compilare: main.cpp: In function 'int update(int)': main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0; i<v[pivot].size(); i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int bfs()': main.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(int i=0; i<v[node].size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:90:40: warning: narrowing conversion of 'v[y].std::vector<arc>::size()' from 'std::vector<arc>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 90 | v[x].push_back({y,c,0,v[y].size()}); | ~~~~~~~~~^~ main.cpp:91:42: warning: narrowing conversion of '(v[x].std::vector<arc>::size() - 1)' from 'std::vector<arc>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 91 | v[y].push_back({x,0,0,v[x].size()-1}); | ~~~~~~~~~~~^~