Compilare: user.cpp: In function ‘void df(int)’: user.cpp:24:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:51:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:72:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:89:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stCresc[whatStackCresc[a[nod][i]]].size(); ++k) ^ user.cpp:115:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stDesc[whatStackDesc[a[nod][i]]].size(); ++k) ^ user.cpp:135:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stCresc[whatStackCresc[nod]].size(); step *= 2); ^ user.cpp:138:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stCresc[whatStackCresc[nod]].size() && ^ user.cpp:145:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stCresc[whatStackCresc[nod]].size() - 1 == pos) ^ user.cpp:164:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stDesc[whatStackDesc[nod]].size(); step *= 2); ^ user.cpp:168:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stDesc[whatStackDesc[nod]].size() && ^ user.cpp:175:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stDesc[whatStackDesc[nod]].size() - 1 == pos) ^ user.cpp:195:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:204:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < desc.size(); ++j) ^ user.cpp:222:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[a[nod][i]]].size(); ++pCresc) ^ user.cpp:246:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < cresc.size(); ++j) ^ user.cpp:264:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < cresc.size(); ++pCresc) ^ user.cpp:291:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]