#include using namespace std; #include using namespace atcoder; using mint=modint998244353; //1000000007; using ll=long long; using pp=pair; #define sr string #define vc vector #define db double #define fi first #define se second #define rep(i,n) for(int i=0;i<(int)n;i++) #define pb push_back #define all(v) v.begin(),v.end() #define pque priority_queue #define bpc(a) __builtin_popcount(a) int main(){ ll n,k;cin>>n>>k; k=n*(n+1)/2-k; ll r=1; ll sum=1; if(k==n*(n+1)/2){ cout<<1; return 0; } for(ll l=1;l<=n;l++){ while(sum