Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:49:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:56:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxc < stCresc[whatStackCresc[a[nod][i]]].size()) ^ user.cpp:62:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxd < stDesc[whatStackDesc[a[nod][i]]].size()) ^ user.cpp:71:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:83:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[nod]].size(); ++pCresc) ^ user.cpp:101:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pCresc + step < stCresc[whatStackCresc[nod]].size() && stCresc[whatStackCresc[nod]][pCresc] <= val[nod]) ^ user.cpp:105:77: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pDesc + step < stDesc[whatStackDesc[a[nod][i]]].size() && stDesc[whatStackDesc[a[nod][i]]][pDesc] >= val[nod]) ^ user.cpp:132:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[a[nod][i]]].size(); ++pCresc) ^ user.cpp:150:80: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pCresc + step < stCresc[whatStackCresc[a[nod][i]]].size() && stCresc[whatStackCresc[a[nod][i]]][pCresc] <= val[nod]) ^ user.cpp:154:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pDesc + step < stDesc[whatStackDesc[nod]].size() && stDesc[whatStackDesc[nod]][pDesc] >= val[nod]) ^ user.cpp:177:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:186:76: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stCresc[whatStackCresc[a[nod][i]]].size(); ++k) ^ user.cpp:198:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stDesc[whatStackDesc[a[nod][i]]].size(); ++k) ^ user.cpp:213:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stCresc[whatStackCresc[nod]].size(); step *= 2); ^ user.cpp:216:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stCresc[whatStackCresc[nod]].size() && ^ user.cpp:223:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]