Compilare: main.cpp: In function 'bool divide(long long unsigned int, long long int)': main.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (hatz <= (1LL<<(2 * c))) ~~~~~^~~~~~~~~~~~~~~~~ main.cpp:19:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (hatz <= (1LL<<(2 * c)) * 3) ~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'long long unsigned int divide2(bool, long long unsigned int, long long int)': main.cpp:28:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (l <= (1LL<<(2 * c))) ~~^~~~~~~~~~~~~~~~~ main.cpp:30:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (l <= 2 * (1LL << (2 * c))) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (l <= 3 * (1LL << (2 * c))) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < k; ++i) ~~^~~ main.cpp:61:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((1LL<<(2 * (x + 1))) <= lmao) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~ main.cpp:56:41: warning: iteration 100 invokes undefined behavior [-Waggressive-loop-optimizations] frecv[i][j] = frecv[i - 1][j] + (j == s[i] - 'A'); ~~~~~~~~~~~~~~^ main.cpp:55:27: note: within this loop for (int j = 0; j < 200; ++j) ~~^~~~~ main.cpp:51:57: warning: iteration 100 invokes undefined behavior [-Waggressive-loop-optimizations] a[i][1][j] = a[i][0][j] = 2 * (a[i - 1][0][j] + a[i - 1][1][j]); ~~~~~~~~~~~~~^ main.cpp:50:27: note: within this loop for (int j = 0; j < 200; ++j) ~~^~~~~