Submission #448627

#	Time	Username	Problem	Language	Result	Execution time	Memory
448627		nikolapesic2802	Zoltan (COCI16_zoltan)	C++14	42 / 140	328 ms	13996 KiB

zoltan

#include<bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define dec(x, y) fixed << setprecision((y)) << (x)
#define xx first
#define yy second
#define srt(v) sort((v).begin(), (v).end())
#define srtr(v) sort((v).rbegin(), (v).rend())
#define pb push_back
#define popb pop_back
#define sz(a) (int)(a).size()
#define len(a) (int)(a).length()
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const ll mod=(ll)1e9+7LL;
int n, a[200010];
pii b[200010], lis[200010], lds[200010];
pair<int, ll> st[800010];
void build(int node, int tl, int tr) {
    if(tl==tr) {st[node].xx=0; st[node].yy=1LL; return;}
    int mid=(tl+tr)/2;
    build(2*node, tl, mid);
    build(2*node+1, mid+1, tr);
    st[node].xx=0;
    st[node].yy=0LL;
}
void upd(int node, int tl, int tr, int poz, pii val) {
    if(tl==tr) {
        if(st[node].xx!=val.xx) {st[node].xx=val.xx; st[node].yy=(ll)val.yy; return;}
        else {++st[node].yy; return;}
    }
    int mid=(tl+tr)/2;
    if(poz<=mid) upd(2*node, tl, mid, poz, val);
    else upd(2*node+1, mid+1, tr, poz, val);
    st[node].xx=max(st[2*node].xx, st[2*node+1].xx);
    st[node].yy=((st[2*node].xx==st[node].xx?st[2*node].yy:0LL)+(st[2*node+1].xx==st[node].xx?st[2*node+1].yy:0LL))%mod;
}
pair<int, ll> query(int node, int tl, int tr, int gl, int gr) {
    if(tl>=gl && tr<=gr) return st[node];
    int mid=(tl+tr)/2;
    pair<int, ll> res1={0, 0}, res2={0, 0};
    if(mid>=gl) res1=query(2*node, tl, mid, gl, gr);
    if(mid+1<=gr) res2=query(2*node+1, mid+1, tr, gl, gr);
    if(res1.xx>res2.xx) return res1;
    else if(res2.xx>res1.xx) return res2;
    else return {res1.xx, (res1.yy+res2.yy)%mod};
}
ll step(int sta) {
    if(sta==-1) return 1LL;
    if(sta==0) return 1LL;
    if(sta==1) return 2LL;
    ll pola=step(sta/2);
    pola*=pola; pola%=mod;
    if(sta&1) {pola*=2LL; pola%=mod;}
    return pola;
}
int main() {
    ios;
    cin >> n;
    for(int i=0; i<n; ++i) {
        cin >> b[i].xx;
        b[i].yy=i;
    }
    sort(b, b+n);
    int dokle=1;
    a[b[0].yy]=1;
    for(int i=1; i<n; ++i) {
        a[b[i].yy]=(b[i-1].xx==b[i].xx?dokle:++dokle);
    }
    build(1, 1, dokle);
    lis[n-1].xx=lis[n-1].yy=1;
    upd(1, 1, dokle, a[n-1], {1, 1});
    for(int i=n-2; i>=0; --i) {
        if(a[i]==dokle) {
            lis[i].xx=1; lis[i].yy=1;
        }
        else {
            pair<int, ll> nes=query(1, 1, dokle, a[i]+1, dokle);
            lis[i].xx=nes.xx+1; lis[i].yy=nes.yy;
        }
        upd(1, 1, dokle, a[i], lis[i]);
    }
    build(1, 1, dokle);
    lds[n-1].xx=lds[n-1].yy=1;
    upd(1, 1, dokle, a[n-1], {1, 1});
    for(int i=n-2; i>=0; --i) {
        if(a[i]==1) {
            lds[i].xx=1; lds[i].yy=1;
        }
        else {
            pair<int, ll> nes=query(1, 1, dokle, 1, a[i]-1);
            lds[i].xx=nes.xx+1; lds[i].yy=nes.yy;
        }
        upd(1, 1, dokle, a[i], lds[i]);
    }
    int mx=0;
    for(int i=0; i<n; ++i) {
        mx=max(mx, lis[i].xx+lds[i].xx-1);
    }
    cout << mx << ' ';
    ll uk=0LL;
    ll stepen=step(n-mx-1);
    for(int i=0; i<n; ++i) {
        if(lis[i].xx+lds[i].xx-1!=mx) continue;
        uk+=lis[i].yy%mod*lds[i].yy%mod*stepen*(mx!=n ? 2LL : 1LL)%mod;
        uk%=mod;
    }
    cout << uk;
    return 0;
}

• Subtask 1: 42 / 140