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:103:74: 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:107:77: 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:134:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; pCresc < stCresc[whatStackCresc[a[nod][i]]].size(); ++pCresc) ^ user.cpp:152:80: 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:156:71: 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:179:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a[nod].size(); ++i) ^ user.cpp:188:76: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stCresc[whatStackCresc[a[nod][i]]].size(); ++k) ^ user.cpp:200:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < stDesc[whatStackDesc[a[nod][i]]].size(); ++k) ^ user.cpp:215:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;step <= stCresc[whatStackCresc[nod]].size(); step *= 2); ^ user.cpp:218:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < stCresc[whatStackCresc[nod]].size() && ^ user.cpp:225:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]