Compilare: main.cpp: In function 'int main()': main.cpp:18:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (minn > v[i - j * j].size()) { ~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[i - nr].size(); j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:34:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[mat[i][j]].size() > k) ~~~~~~~~~~~~~~~~~~~~^~~ main.cpp:41:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[mat[i][j]].size() >= t) ~~~~~~~~~~~~~~~~~~~~^~~~