Compilare: main.cpp: In function 'int main()': main.cpp:29:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ind[i] < v[i].size()) { ~~~~~~~^~~~~~~~~~~~~ main.cpp:48:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ind[i] < v[i].size() && v[i][ind[i]] == pos) { ~~~~~~~^~~~~~~~~~~~~ main.cpp:50:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ind[i] < v[i].size()) { ~~~~~~~^~~~~~~~~~~~~