Submission #488632

#	Time	Username	Problem	Language	Result	Execution time	Memory
488632		Victor	Zoltan (COCI16_zoltan)	C++17	70 / 140	537 ms	56832 KiB

zoltan

#include <bits/stdc++.h>

using namespace std;

#define rep(i, a, b) for (int i = (a); i < (b); ++i)
#define per(i, a, b) for (int i = (b - 1); i >= (a); --i)
#define trav(a, x) for (auto &a : x)

#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define pb push_back
#define debug(x) cout << #x << " = " << x << endl

#define umap unordered_map
#define uset unordered_set

typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;

typedef long long ll;
typedef pair<ll, ll> pll;
typedef vector<ll> vll;
typedef vector<pll> vpll;

const int INF = 1'000'000'007;

struct Node {
    Node *l, *r;
    int len = 0, lo, hi;
    ll cnt = 1;
    Node(int L, int R) : lo(L), hi(R) {
        if (hi - lo != 1) {
            int mid = (lo + hi) >> 1;
            l = new Node(lo, mid);
            r = new Node(mid, hi);
        }
    }

    pair<int, ll> query(int L, int R) {
        if (hi <= L || R <= lo) return {0, 1};
        if (L <= lo && hi <= R) return {len, cnt};
        return combine(l->query(L, R), r->query(L, R));
    }

    void update(int pos, int nlen, ll ncnt) {
        if (pos < lo || hi <= pos) return;
        if (hi - lo == 1) {
            tie(len, cnt) = combine({len, cnt}, {nlen, ncnt});
            return;
        }
        l->update(pos,nlen,ncnt); r->update(pos,nlen,ncnt);
        tie(len,cnt)=combine({l->len,l->cnt},{r->len,r->cnt});
    }

    pair<int, ll> combine(pair<int, ll> v1, pair<int, ll> v2) {
        int len1, len2;
        ll cnt1, cnt2;
        tie(len1, cnt1) = v1;
        tie(len2, cnt2) = v2;

        if (len2 < len1) return {len1, cnt1};
        if (len1 < len2) return {len2, cnt2};
        return {len1, (cnt1 + cnt2) % INF};
    }
};

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin.exceptions(cin.failbit);

    int ans = 0, arr[200001], n;
    ll cnt = 0;
    set<int> nums;
    umap<int, int> compress;

    cin >> n;
    rep(i, 0, n) cin >> arr[i], nums.insert(arr[i]);
    int pos = 0;
    trav(num, nums) compress[num] = pos++;
    rep(i, 0, n) arr[i] = compress[arr[i]];


    Node lis(0,pos);
    Node lds(0,pos);
    per(i,0,n){
        int num=arr[i];
        int len_lis,len_lds;
        ll cnt_lis,cnt_lds;

        tie(len_lis,cnt_lis)=lis.query(0,num);
        tie(len_lds,cnt_lds)=lds.query(num+1,pos);
        ++len_lis; ++len_lds;
        
        if(len_lis==1)cnt_lis=1;
        if(len_lds==1)cnt_lds=1;

        lis.update(num,len_lis,cnt_lis);
        lds.update(num,len_lds,cnt_lds);


        int cur_len=len_lis+len_lds-1;
        ll cur_cnt=cnt_lis*cnt_lds;

        //cout<<"i = "<<i<<" num = "<<num<<endl;
        //cout<<"cur len = "<<cur_len<<" cur cnt = "<<cur_cnt<<endl;
        //cout<<"len lis = "<<len_lis<<" cnt lis = "<<cnt_lis<<endl;
        //cout<<"len lds = "<<len_lds<<" cnt lds = "<<cnt_lds<<endl;
        //cout<<endl;

        if(cur_len>ans){
            ans=cur_len;
            cnt=0;

        }
        if(cur_len>=ans)cnt=(cnt+cur_cnt)%INF;
    }

    rep(i,0,n-ans)cnt=(cnt<<1)%INF;
    cout<<ans<<' '<<cnt<<endl;
    return 0;
}

• Subtask 1: 70 / 140