Compilare: user.cpp:6:13: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define P 1 << 17 ^ user.cpp:10:9: note: in expansion of macro ‘P’ punct v[P + 10]; ^ user.cpp:6:13: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define P 1 << 17 ^ user.cpp:18:19: note: in expansion of macro ‘P’ std::vector<int>a[P + 1]; ^ user.cpp: In function ‘int main()’: user.cpp:54:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[i].size() >= k) { ^ user.cpp:24:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:27:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^