Compilare: main.cpp: In function 'int main()': main.cpp:47:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos == -1) pos = k - 1; ~~~~^~~~~ main.cpp:55:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (n <= len / 4) gr = 1; ~~^~~~~~~~~~ main.cpp:56:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (n <= len / 2) gr = 2; ~~^~~~~~~~~~ main.cpp:57:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (n <= len / 4 * 3) gr = 3; ~~^~~~~~~~~~~~~~ main.cpp:51:22: warning: unused variable 'lcaps' [-Wunused-variable] bool caps = false, lcaps; ^~~~~