Compilare: main.cpp: In function 'bool ok2(int)': main.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = p[ind]; i < min(s.size(), aux.size() + p[ind]); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool ok(int)': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < s.size() - x; i++) { ~~^~~~~~~~~~~~~~