Compilare: main.cpp: In function 'int main()': main.cpp:43:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (r != n) ~~^~~~ main.cpp:53:39: warning: array subscript has type 'char' [-Wchar-subscripts] printf ("%c 0\n", lit[s[r]]); ^ main.cpp:23:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("caps.in", "r", stdin); ^ main.cpp:24:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("caps.out", "w", stdout); ^ main.cpp:29:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d ", &n, &q); ^ main.cpp:30:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%s", s); ^ main.cpp:40:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%llu", &k); ^ main.cpp:33:16: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations] lit[i] = 'A' + i - 'a'; ~~~~~~~^~~~~~~~~~~~~~~ main.cpp:32:21: note: within this loop for (i = 'a'; i <= 'z'; i++) ~~^~~~~~