Compilare: main.cpp: In function 'int main()': main.cpp:87:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j] < v[j].size()) res = - comp(v[j][ind[j]]) - 1; ~~~~~~~^~~~~~~~~~~~~ main.cpp:89:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j] < v[j].size() && v[j][ind[j]] + res <= x) { ~~~~~~~^~~~~~~~~~~~~ main.cpp:125:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind[j] < v[j].size() && v[j][ind[j]] < v[minim][ind[minim]]) { ~~~~~~~^~~~~~~~~~~~~