QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#339719#7899. Say Hello to the FuturegoodierWA 140ms43328kbC++144.7kb2024-02-27 20:29:322024-02-27 20:29:33

Judging History

你现在查看的是最新测评结果

  • [2024-02-27 20:29:33]
  • 评测
  • 测评结果:WA
  • 用时:140ms
  • 内存:43328kb
  • [2024-02-27 20:29:32]
  • 提交

answer

#include <bits/stdc++.h>

#define x first
#define y second
#define mp make_pair

using namespace std;
typedef pair<int,int> PII;
typedef long long ll;
const int N = 2e5 + 10;
const ll MOD = 998244353;

struct Query{
    int id;
    ll t;
    PII lim;
};

ll f[N], g[N], c[3 * N], ans[N];
int a[N], len[N], n;
PII st[N][20], p[N];

void init()
{
    for(int i = 2; i <= n; i++) len[i] = len[i >> 1] + 1;
    for(int i = 1; i <= n; i++) st[i][0] = mp(a[i], i);
    for(int j = 1; j <= len[n]; j++)
    {
        for(int i = 1; i + (1 << j) - 1 <= n; i++)
        {
            st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
        }
    }
}

bool cmpx(PII a, PII b)
{
    return a.x < b.x;
}

bool cmpy(PII a, PII b)
{
    return a.y < b.y;
}

bool cmpxq(Query a, Query b)
{
    return a.lim.x < b.lim.x;
}

bool cmpxq2(Query a, Query b)
{
    return a.lim.x > b.lim.x;
}

void add(int x, ll y)
{
    x += n;
	 if(!x) exit(0);
    for(; x <= n + n + n; x += x & -x) c[x] = (c[x] + y + MOD) % MOD;
}

ll ask(int x)
{
    x += n;
    ll res = 0;
    for(; x; x -= x & -x) res = (res + c[x] + MOD) % MOD;
    return res;
}

PII querymx(int l, int r)
{
    int t = len[r - l + 1];
    return max(st[l][t], st[r - (1 << t) + 1][t]);
}

void solve1(int l, int r, ll f[N])
{
    if(l == r)
    {
        if(a[l] == 1)
        {
            f[l] = (f[l - 1] + f[l]) % MOD;
        }
        return;
    }
    int mid = l + r >> 1;
    solve1(l, mid, f);
    for(int i = l; i <= mid; i++)
    {
        p[i] = mp(i, querymx(i, mid).x + i - 1);
    }
    for(int i = mid + 1; i <= r; i++)
    {
        p[i] = mp(i, i - querymx(mid + 1, i).x + 1);
    }
    sort(p + l, p + mid + 1, cmpy), sort(p + mid + 1, p + r + 1, cmpx);
    int i, j;
    for(i = l, j = mid + 1; i <= mid && j <= r; )
    {
        if(p[i].y <= p[j].x)
        {
            add(p[i].x, f[p[i].x - 1]);
            i++;
        }
        else
        {
            f[p[j].x] = (f[p[j].x] + ask(p[j].y)) % MOD;
            j++;
        }
    }
    while(j <= r)
    {
        f[p[j].x] = (f[p[j].x] + ask(p[j].y)) % MOD;
        j++;
    }
    while(i > l)
    {
        i--;
        add(p[i].x, -f[p[i].x - 1]);
    }
    solve1(mid + 1, r, f);
}

void solve2(int l, int r)
{
    if(l == r)
    {
        if(a[l] > 1) ans[l] = (ans[l] + g[l + 1] * f[l - 1] % MOD) % MOD;
        return;
    }

    vector <Query> ql, qr;
    int mid = l + r >> 1;
    for(int i = l; i <= mid; i++)
    {
        p[i] = mp(i, querymx(i, mid).x + i - 1);
    }
    for(int i = mid + 1; i <= r; i++)
    {
        p[i] = mp(i, i - querymx(mid + 1, i).x + 1);
    }
    for(int i = l; i <= mid; i++)
    {
        int pos = querymx(i, mid).y;
        int nowmx = 1; if(i < pos) nowmx = max(nowmx, querymx(i, pos - 1).x); if(pos < mid) nowmx = max(nowmx, querymx(pos + 1, mid).x);
        qr.push_back(Query({pos, -f[i - 1], mp(p[i].y, p[i].x)}));
        qr.push_back(Query({pos, f[i - 1], mp(nowmx + i - 1, i)}));
    }
    for(int i = mid + 1; i <= r; i++)
    {
        int pos = querymx(mid + 1, i).y;
        int nowmx = 1; if(mid + 1 < pos) nowmx = max(nowmx, querymx(mid + 1, pos - 1).x); if(pos < i) nowmx = max(nowmx, querymx(pos + 1, i).x);
        ql.push_back(Query({pos, -g[i + 1], mp(p[i].y, p[i].x)}));
        ql.push_back(Query({pos, g[i + 1], mp(i - nowmx + 1, i)}));
    }
    sort(ql.begin(), ql.end(), cmpxq), sort(qr.begin(), qr.end(), cmpxq2);
    int i = l;
    for(auto& q : ql)
    {
        while(i <= mid && i <= q.lim.x)
        {
            add(p[i].y, f[i - 1]);
            i++;
        }
        ans[q.id] = (ans[q.id] + (ll)q.t * ask(q.lim.y) % MOD + MOD) % MOD;
    }
    while(i > l)
    {
        i--;
        add(p[i].y, -f[i - 1]);
    }
    i = r;
    for(auto& q : qr)
    {
        while(i >= q.lim.x && i > mid)
        {
            add(p[i].y, g[i + 1]);
            i--;
        }
        ans[q.id] = (ans[q.id] + (ll)q.t * (ask(n) - ask(q.lim.y - 1) + MOD) % MOD + MOD) % MOD;
    }
    while(i < r)
    {
        i++;
        add(p[i].y, -g[i + 1]);
    }
    solve2(l, mid), solve2(mid + 1, r);
}

int main()
{
    //freopen("data.in", "r", stdin);
    f[0] = g[0] = 1;
    scanf("%d", &n);
    for(int i = 1; i <= n; i++) scanf("%d", &a[i]);
    reverse(a + 1, a + n + 1);
    init();
    solve1(1, n, g); for(int i = 0; i < n + 1 - i; i++) swap(g[i], g[n + 1 - i]);
	if(n > 5) exit(0);
    reverse(a + 1, a + n + 1);
    init();
    solve1(1, n, f);
    solve2(1, n);
    for(int i = 1; i <= n; i++) printf("%lld ", (ans[i] + f[n]) % MOD);
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 14328kb

input:

5
1 3 2 1 2

output:

3 6 3 3 6 

result:

ok 5 tokens

Test #2:

score: -100
Wrong Answer
time: 140ms
memory: 43328kb

input:

200000
15922 15391 11782 4758 1973 19909 16800 6438 3821 986 18599 2011 338 19886 12401 4169 11143 12665 3230 12565 15065 15056 5090 16908 13677 12634 11435 1425 8647 3876 10694 12256 3853 19901 5723 11065 6147 13613 13768 15794 14993 5819 8117 13871 14708 15099 7152 9810 14438 10557 3209 1265 13915...

output:


result:

wrong answer Unexpected EOF in the participants output