Compilare: user.cpp: In function ‘int paralel(int, int)’: user.cpp:61:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(edge_ptr[n1] < g[n1].size()) { ~~~~~~~~~~~~~^~~~~~~~~~~~~~ user.cpp:69:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(edge_ptr[n2] < g[n2].size()) { ~~~~~~~~~~~~~^~~~~~~~~~~~~~ user.cpp:76:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(edge_ptr[n1] >= g[n1].size()) return b; ~~~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp:77:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(edge_ptr[n2] >= g[n2].size()) return a; ~~~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp: In function ‘bool pot(int)’: user.cpp:107:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(int i = 1; i < N; ++i) ^~~ user.cpp:109:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ for(int i=1;i<n;++i)went[i]=0,cant[i]=0; ^~~