Compilare: main.cpp: In function 'void euler(int)': main.cpp:68:17: warning: unused variable 'i4' [-Wunused-variable] int i4 = edges[e4].toIndex; ^~ main.cpp: In function 'void pairEdges(int)': main.cpp:94:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[node].size(); i++) { ~^~~~~~~~~~~~~~~ main.cpp:104:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; 2*i<g[node].size(); i++) { ~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:122:36: warning: narrowing conversion of '(g[a].std::vector<_Tp, _Alloc>::size<int, std::allocator<int> >() - 1ul)' from 'std::vector<int>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] edges[j] = {a, b, g[a].size()-1, g[b].size()-1, color, 0}; ~~~~~~~~~~~^~ main.cpp:122:51: warning: narrowing conversion of '(g[b].std::vector<_Tp, _Alloc>::size<int, std::allocator<int> >() - 1ul)' from 'std::vector<int>::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing] edges[j] = {a, b, g[a].size()-1, g[b].size()-1, color, 0}; ~~~~~~~~~~~^~