Compilare: main.cpp: In function 'int main()': main.cpp:130:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;k>=c[poz[i]].size();i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:133:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<c[poz[i]].size();j++) ~^~~~~~~~~~~~~~~~~ main.cpp:137:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(c[poz[i]].size() == k+1){ ~~~~~~~~~~~~~~~~~^~~~~~