Compilare: main.cpp: In function 'int hmin(int)': main.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = l; i < s.size(); ++i) { ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:23: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i = 0; i < l; ++i) { ~~^~~