Compilare: user.cpp: In function ‘void df(int)’: user.cpp:22:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:46:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:66:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:83:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stCresc[whatStackCresc[a[nod][i]]].size(); ++k) ^ user.cpp:109:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stDesc[whatStackDesc[a[nod][i]]].size(); ++k) ^ user.cpp:129:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stCresc[whatStackCresc[nod]].size(); step *= 2); ^ user.cpp:132:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stCresc[whatStackCresc[nod]].size() && ^ user.cpp:139:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stCresc[whatStackCresc[nod]].size() - 1 == pos) ^ user.cpp:158:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stDesc[whatStackDesc[nod]].size(); step *= 2); ^ user.cpp:162:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stDesc[whatStackDesc[nod]].size() && ^ user.cpp:169:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stDesc[whatStackDesc[nod]].size() - 1 == pos) ^ user.cpp:190:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:198:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < desc.size(); ++j) ^ user.cpp:214:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[nod]].size(); ++pCresc) ^ user.cpp:237:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < cresc.size(); ++j) ^ user.cpp:254:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < cresc.size(); ++pCresc) ^