Compilare: user.cpp: In function ‘int main()’: user.cpp:23:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[55]’ [-Wformat=] scanf("%lld %s", &N, &x); ^ user.cpp:24:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(x); ++i) ^ user.cpp:30:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= strlen(x); ++i) { ^