Compilare: main.cpp: In function 'int main()': main.cpp:56:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] f>>a[i]+1; ~~~~^~ main.cpp:73:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (L[i].size() < k) { ~~~~~~~~~~~~^~~ main.cpp:86:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (L[j].size() < k && v[j] == 0) { ~~~~~~~~~~~~^~~