Compilare: user.cpp:9:13: warning: ISO C99 requires whitespace after the macro name [enabled by default] #define nmax=50000 ^ user.cpp:10:13: warning: ISO C99 requires whitespace after the macro name [enabled by default] #define mmax=250000 ^ user.cpp: In function ‘void heapify(std::vector<int>&, int)’: user.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (2*i+1<x.size() && c[x[i]]>c[x[i*2+1]]) ^ user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (2*i+2<x.size() && c[x[i]]>c[x[i*2+2]]) ^ user.cpp: In function ‘int main()’: user.cpp:76:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[1].size();i++) ^ user.cpp:87:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[u].size();i++) if (viz[v[u][i].first]!=1) ^