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:58:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxc < stCresc[whatStackCresc[a[nod][i]]].size()) ^ user.cpp:64:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxd < stDesc[whatStackDesc[a[nod][i]]].size()) ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:85:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[nod]].size(); ++pCresc) ^ user.cpp:112:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[a[nod][i]]].size(); ++pCresc) ^ user.cpp:136:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:145:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stCresc[whatStackCresc[a[nod][i]]].size(); ++k) ^ user.cpp:164:70: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stDesc[whatStackDesc[a[nod][i]]].size(); ++k) ^ user.cpp:179:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stCresc[whatStackCresc[nod]].size(); step *= 2); ^ user.cpp:182:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stCresc[whatStackCresc[nod]].size() && ^ user.cpp:189:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stCresc[whatStackCresc[nod]].size() - 1 == pos) ^ user.cpp:206:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stDesc[whatStackDesc[nod]].size(); step *= 2); ^ user.cpp:210:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stDesc[whatStackDesc[nod]].size() && ^ user.cpp:217:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((pos && stDesc[whatStackDesc[nod]].size() - 1 == pos) ^ user.cpp:239:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]