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Submission #662299

# Submission time Handle Problem Language Result Execution time Memory
662299 2022-11-26T08:22:56 Z fatemetmhr Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 675 ms 42100 KB 
// heiy ... ye rooze jadid ...

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define all(x) x.begin(), x.end()
#define pb     push_back
#define fi     first
#define se     second

const int maxn5 = 1e6 + 10;
const int maxnt = 1e6 + 10;

int sum[maxnt], a[maxn5], rev[maxn5], out[maxn5], per[maxn5];
int rig[maxn5], sz[maxn5], t[maxn5], ind[maxn5], last[maxn5];
bool mark[maxn5];
vector <int> av;

inline bool cmp(int i, int j){return t[i] < t[j];}

void upd(int l, int r, int id, int val, int v){
    if(r - l == 1){
        sum[v] = val;
        return;
    }
    int mid = (l + r) >> 1;
    if(id < mid)
        upd(l, mid, id, val, v * 2);
    else
        upd(mid, r, id, val, v * 2 + 1);
    sum[v] = sum[v * 2] + sum[v * 2 + 1];
}

pair<int, int> find_first(int l, int r, int val, int v){
    if(r - l == 1)
        return {l, sum[v]};
    int mid = (l + r) >> 1;
    if(sum[v * 2] >= val)
        return find_first(l, mid, val, v * 2);
    auto ans = find_first(mid, r, val - sum[v * 2], v * 2 + 1);
    return {ans.fi, ans.se + sum[v * 2]};
}


int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);

    int n, q; cin >> n >> q;
    for(int i = 0; i < n; i++){
        cin >> a[i];
        a[i]--;
        rev[a[i]] = i;
    }
    for(int i = 0; i < q; i++){
        cin >> t[i] >> ind[i];
        per[i] = i;
    }
    fill(rig, rig + n + 10, n);
    for(int i = n - 1; i >= 0; i--){
        while(av.size() && a[av.back()] < a[i])
            av.pop_back();
        if(av.size())
            rig[i] = av.back();
        av.pb(i);
    }

    for(int i = 0; i != n; i = rig[i]){
        upd(0, n, a[i], rig[i] - i, 1);
        sz[i] = rig[i] - i;
        mark[i] = true;
        //cout << "ok " << i << ' ' << rig[i] << ' ' << sz[i] << endl;
        last[i] = rig[i];
    }


    sort(per, per + q, cmp); // bar hasbe t[i]

    int done = 0;
    bool re = false;

    for(int i = 0; i < q; i++){
        while(done < t[per[i]] && !re){
            done++;
            auto tmp = find_first(0, n, n / 2, 1);
            int p = tmp.fi, r = tmp.se - n / 2;
            if(r == 0){
                re = true;
                break;
            }
            int v = rev[p] + sz[rev[p]] - r;
            int vv = v;
            //cout << "now " << done << ' ' << p << ' ' << r << ' ' << v << ' ' << rev[p] << ' ' << sz[rev[p]] << ' ' << tmp.se << endl;
            sz[rev[p]] -= r;
            upd(0, n, p, sz[rev[p]], 1);
            for(; !mark[v] && v != n ; v = rig[v]){
                mark[v] = true;
                sz[v] = min(last[rev[p]], rig[v]) - v;
                last[v] = min(last[rev[p]], rig[v]);
                //cout << "it's " << v << ' ' << rig[v] << ' ' << sz[v] << endl;
                upd(0, n, a[v], sz[v], 1);
            }
            last[rev[p]] = vv;
        }
        auto tmp = find_first(0, n, ind[per[i]], 1);
        int p = tmp.fi, r = tmp.se - ind[per[i]];
        r = sz[rev[p]] - r - 1;
        out[per[i]] = a[rev[p] + r] + 1;
    }

    for(int i = 0; i < q; i++)
        cout << out[i] << '\n';
    
}

/*
8 1
6 8 3 5 4 7 2 1 
3 5

*/

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 364 ms 19896 KB Output is correct
2 Correct 381 ms 19844 KB Output is correct
3 Correct 377 ms 19100 KB Output is correct
4 Correct 316 ms 19012 KB Output is correct
5 Correct 364 ms 19920 KB Output is correct
6 Correct 322 ms 19032 KB Output is correct
7 Correct 364 ms 19916 KB Output is correct
8 Correct 335 ms 19080 KB Output is correct
9 Correct 335 ms 19104 KB Output is correct
10 Correct 327 ms 19248 KB Output is correct
11 Correct 327 ms 19276 KB Output is correct
12 Correct 260 ms 18984 KB Output is correct
13 Correct 321 ms 19396 KB Output is correct
14 Correct 343 ms 19508 KB Output is correct
15 Correct 345 ms 19792 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 268 ms 19272 KB Output is correct
18 Correct 242 ms 19148 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 363 ms 27772 KB Output is correct
2 Correct 375 ms 42100 KB Output is correct
3 Correct 291 ms 33828 KB Output is correct
4 Correct 298 ms 30948 KB Output is correct
5 Correct 307 ms 31656 KB Output is correct
6 Correct 291 ms 31920 KB Output is correct
7 Correct 366 ms 36256 KB Output is correct
8 Correct 356 ms 37352 KB Output is correct
9 Correct 295 ms 31600 KB Output is correct
10 Correct 330 ms 36160 KB Output is correct
11 Correct 268 ms 29772 KB Output is correct
12 Correct 263 ms 29256 KB Output is correct
13 Correct 323 ms 35700 KB Output is correct
14 Correct 273 ms 32620 KB Output is correct
15 Correct 331 ms 38572 KB Output is correct
16 Correct 21 ms 5728 KB Output is correct
17 Correct 308 ms 35676 KB Output is correct
18 Correct 246 ms 25204 KB Output is correct
19 Correct 77 ms 9508 KB Output is correct
20 Correct 95 ms 13056 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 5592 KB Output is correct
2 Correct 68 ms 7348 KB Output is correct
3 Correct 76 ms 7340 KB Output is correct
4 Correct 52 ms 5952 KB Output is correct
5 Correct 70 ms 6124 KB Output is correct
6 Correct 52 ms 6220 KB Output is correct
7 Correct 59 ms 5964 KB Output is correct
8 Correct 59 ms 6116 KB Output is correct
9 Correct 58 ms 6472 KB Output is correct
10 Correct 46 ms 6336 KB Output is correct
11 Correct 48 ms 6008 KB Output is correct
12 Correct 46 ms 6316 KB Output is correct
13 Correct 50 ms 6388 KB Output is correct
14 Correct 48 ms 6456 KB Output is correct
15 Correct 44 ms 5824 KB Output is correct
16 Correct 12 ms 3156 KB Output is correct
17 Correct 55 ms 6992 KB Output is correct
18 Correct 37 ms 4680 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 364 ms 19896 KB Output is correct
2 Correct 381 ms 19844 KB Output is correct
3 Correct 377 ms 19100 KB Output is correct
4 Correct 316 ms 19012 KB Output is correct
5 Correct 364 ms 19920 KB Output is correct
6 Correct 322 ms 19032 KB Output is correct
7 Correct 364 ms 19916 KB Output is correct
8 Correct 335 ms 19080 KB Output is correct
9 Correct 335 ms 19104 KB Output is correct
10 Correct 327 ms 19248 KB Output is correct
11 Correct 327 ms 19276 KB Output is correct
12 Correct 260 ms 18984 KB Output is correct
13 Correct 321 ms 19396 KB Output is correct
14 Correct 343 ms 19508 KB Output is correct
15 Correct 345 ms 19792 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 268 ms 19272 KB Output is correct
18 Correct 242 ms 19148 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 363 ms 27772 KB Output is correct
22 Correct 375 ms 42100 KB Output is correct
23 Correct 291 ms 33828 KB Output is correct
24 Correct 298 ms 30948 KB Output is correct
25 Correct 307 ms 31656 KB Output is correct
26 Correct 291 ms 31920 KB Output is correct
27 Correct 366 ms 36256 KB Output is correct
28 Correct 356 ms 37352 KB Output is correct
29 Correct 295 ms 31600 KB Output is correct
30 Correct 330 ms 36160 KB Output is correct
31 Correct 268 ms 29772 KB Output is correct
32 Correct 263 ms 29256 KB Output is correct
33 Correct 323 ms 35700 KB Output is correct
34 Correct 273 ms 32620 KB Output is correct
35 Correct 331 ms 38572 KB Output is correct
36 Correct 21 ms 5728 KB Output is correct
37 Correct 308 ms 35676 KB Output is correct
38 Correct 246 ms 25204 KB Output is correct
39 Correct 77 ms 9508 KB Output is correct
40 Correct 95 ms 13056 KB Output is correct
41 Correct 75 ms 5592 KB Output is correct
42 Correct 68 ms 7348 KB Output is correct
43 Correct 76 ms 7340 KB Output is correct
44 Correct 52 ms 5952 KB Output is correct
45 Correct 70 ms 6124 KB Output is correct
46 Correct 52 ms 6220 KB Output is correct
47 Correct 59 ms 5964 KB Output is correct
48 Correct 59 ms 6116 KB Output is correct
49 Correct 58 ms 6472 KB Output is correct
50 Correct 46 ms 6336 KB Output is correct
51 Correct 48 ms 6008 KB Output is correct
52 Correct 46 ms 6316 KB Output is correct
53 Correct 50 ms 6388 KB Output is correct
54 Correct 48 ms 6456 KB Output is correct
55 Correct 44 ms 5824 KB Output is correct
56 Correct 12 ms 3156 KB Output is correct
57 Correct 55 ms 6992 KB Output is correct
58 Correct 37 ms 4680 KB Output is correct
59 Correct 1 ms 328 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 675 ms 39564 KB Output is correct
62 Correct 653 ms 40720 KB Output is correct
63 Correct 623 ms 37672 KB Output is correct
64 Correct 539 ms 36236 KB Output is correct
65 Correct 603 ms 38496 KB Output is correct
66 Correct 583 ms 35988 KB Output is correct
67 Correct 649 ms 37080 KB Output is correct
68 Correct 626 ms 36928 KB Output is correct
69 Correct 637 ms 36108 KB Output is correct
70 Correct 525 ms 36648 KB Output is correct
71 Correct 520 ms 35852 KB Output is correct
72 Correct 554 ms 34688 KB Output is correct
73 Correct 523 ms 35292 KB Output is correct
74 Correct 523 ms 36740 KB Output is correct
75 Correct 512 ms 35812 KB Output is correct
76 Correct 21 ms 5264 KB Output is correct
77 Correct 421 ms 34936 KB Output is correct
78 Correct 328 ms 31424 KB Output is correct
79 Correct 0 ms 324 KB Output is correct
80 Correct 1 ms 408 KB Output is correct