Compilare: user.cpp:6:13: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define P 1 << 17 ^ user.cpp:8:20: note: in expansion of macro ‘P’ std::vector <int>a[P + 1]; ^ user.cpp: In function ‘int main()’: user.cpp:22:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[x].size() > max) ^ user.cpp:30:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[i].size() >= k) { ^ user.cpp:31:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0;j <= a[i].size() - k;j++) { ^ user.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:20:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^