Compilare: user.cpp: In function ‘int main()’: user.cpp:47:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:49:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &j); ^ user.cpp:89:19: warning: ‘_where’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (j = _where + 1; j < int(cycle.size()); ++j) { ^