oj.uz

답안 #577254

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
577254 2022-06-14T10:56:03 Z Ronin13 Zoltan (COCI16_zoltan) C++14
112 / 140
 383 ms 31468 KB 
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
#define ull unsigned ll
using namespace std;

const ll mod = 1e9 + 7;

map <int, int> mp;
const int NMAX = 2e5 + 5;

pll t[4 * NMAX][2];

pll combine(pll a, pll  b){
    if(a.f == b.f) return {a.f, (a.s + b.s) % mod};
    if(a.f > b.f) return a;
    return b;
}

int n;

void build(int v, int l, int r){
    if(l == r){
        if(l == n + 2) {
            t[v][0].s = 1;
        }
        if(l == 1){
            t[v][1].s = 1;
        }
        return;
    }
    int m = (l + r) / 2;
    build(2 * v, l, m);
    build(2 * v + 1, m + 1, r);
    t[v][0] = combine(t[2 * v][0], t[2 * v + 1][0]);
    t[v][1] = combine(t[2 * v][1], t[2 * v + 1][1]);
}

pll get(int v, int l, int r, int st, int fin, int ind){
    if(l > fin || r < st) return {-1, -1};
    if(l >= st && r <= fin) return t[v][ind];
    int m = (l + r) / 2;
    pll x = get(2 * v, l, m, st, fin, ind);
    pll y = get(2 * v + 1, m + 1, r, st, fin, ind);
    return combine(x, y);
}


void update(int v, int l, int r, int pos, pll val, int ind){
    if(l > pos || r < pos) return;
    if(l == r){
        if(t[v][ind].f <= val.f)
        t[v][ind] = val;
        return;
    }
    int m = (l + r) / 2;
    update(2 * v, l, m, pos, val, ind);
    update(2 * v + 1, m + 1, r, pos, val, ind);
    t[v][ind] = combine(t[2 * v][ind], t[2 * v + 1][ind]);
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> n;
    int a[n + 1];
    pii b[n + 1];
    for(int i = 1; i <= n ; i++){
        cin >> a[i];
        b[i] = {a[i], i};
    }
    sort(b + 1, b + 1 + n);
    for(int i = 1; i <= n; i++){
        mp[b[i].f] = i + 1;
    }
    for(int i = 1; i <= n; i++){
        a[i] = mp[a[i]];
    }
    build(1, 1, n + 2);
    pll ans[n + 1];
    ll mx = 0;
    ll cnt = 0;
    for(int i = n; i >= 1; i--){
        pll x = get(1, 1, n + 2, 1, a[i] - 1, 1);
        pll y = get(1, 1, n + 2, a[i] + 1, n + 2, 0);
        ans[i] = {x.f + y.f + 1, x.s * y.s % mod};
        update(1, 1, n + 2, a[i], {x.f + 1, x.s}, 1);
        update(1, 1, n + 2, a[i], {y.f + 1, y.s}, 0);
        mx = max(mx, ans[i].f);
    }
    for(int i = 1; i <= n; i++){
        if(mx == ans[i].f){
            cnt += ans[i].s;
            cnt %= mod;
        }
    }
    for(int i = 1; i <= n - mx; i++){
        cnt *= 2;
        cnt %= mod;
    }
    cout << mx << ' ' << cnt << "\n";
    return 0;
}

Subtask #1
112.0 / 140.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 227 ms 28364 KB Output is correct
12 Correct 229 ms 26848 KB Output is correct
13 Correct 160 ms 18004 KB Output is correct
14 Correct 247 ms 26888 KB Output is correct
15 Correct 331 ms 29464 KB Output is correct
16 Correct 383 ms 31468 KB Output is correct
17 Incorrect 269 ms 30056 KB Output isn't correct
18 Incorrect 268 ms 30008 KB Output isn't correct
19 Incorrect 284 ms 30092 KB Output isn't correct
20 Incorrect 281 ms 30048 KB Output isn't correct