Compilare: main.cpp: In function 'void dfs(int)': main.cpp:35:12: warning: unused variable 'j' [-Wunused-variable] int i, j, nn, sz = g[nod].size(); ^ main.cpp: In function 'int main()': main.cpp:66:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < g[0].size(); i++ ) ans += _flx[{0,g[0][i]}]; ~~^~~~~~~~~~~~~ main.cpp:55:10: warning: unused variable 'j' [-Wunused-variable] int i, j, z, a, b, c; ^ main.cpp:55:13: warning: unused variable 'z' [-Wunused-variable] int i, j, z, a, b, c; ^