Compilare: main.cpp: In function 'void dfs(int)': main.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[x]. size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:76:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[x].size(); ++i) ~~^~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:93:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i< v[x].size(); ++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void print()': main.cpp:109:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[i].size(); ++j ) ~~^~~~~~~~~~~~~ main.cpp:109:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j = 0; j < v[i].size(); ++j ) ^~~ main.cpp:111:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout <<"\n"; ^~~~ main.cpp: In function 'int main()': main.cpp:123:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[a].size(); ++i) ~~^~~~~~~~~~~~~ main.cpp:125:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[b].size(); ++i) ~~^~~~~~~~~~~~~