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답안 #784048

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
784048 2023-07-15T15:28:36 Z Ozy Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 666 ms 62244 KB 
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#define rep(i,a,b) for(int i = (a); i <= (b); i++)
#define repa(i,a,b) for(int i = (a); i >= (b); i--)
#define pll pair<lli,lli>

#define MAX 200000
//para el vector de querys
#define p second.first
#define id second.second

lli n,q,offset,apu,a,b,t,comp;
lli arr[MAX+2],p_arr[MAX+2]; //p_arr[i], poscion de numero i en el arreglo
vector<lli> res;
lli stree[MAX*4];
vector<pair<lli,pll> > querys;
pll sig[MAX+2];
stack<lli> pila;

void update(lli pos, lli ini, lli fin, lli l, lli r, lli val) {

    if (ini > r || fin < l) return;
    if (l <= ini && fin <= r) {
        stree[pos] = val;
        return;
    }

    lli mitad = (ini+fin)/2;
    update(pos*2,ini,mitad,l,r,val);
    update((pos*2)+1,mitad+1,fin,l,r,val);
    stree[pos] = stree[pos*2] + stree[(pos*2)+1];
}

lli suma(lli pos, lli ini, lli fin, lli l, lli r) {

    if (l > r) return 0;
    if (ini > r || fin < l) return 0;
    if (l <= ini && fin <= r) return stree[pos];

    lli a;
    lli mitad = (ini+fin)/2;
    a = suma(pos*2,ini,mitad,l,r);
    a += suma((pos*2)+1,mitad+1,fin,l,r);
    return a;
}

lli busca(lli pos, lli ini, lli fin, lli sum) {
    if (ini == fin) return ini;

    lli mitad = (ini+fin)/2;
    if (stree[pos*2] >= sum) return busca(pos*2,ini,mitad,sum);
    else return busca((pos*2)+1,mitad+1,fin,sum-stree[pos*2]);
}

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

    cin >> n >> q;
    res.resize(q+2);
    offset = 1;
    while (offset < n) offset *= 2;

    rep(i,1,n) {
        cin >> arr[i];
        p_arr[ arr[i] ] = i;
    }
    rep(i,1,q) {
        cin >> a >> b;
        if (a == 0) res[i] = arr[b];
        else querys.push_back({a,{b,i}});
    }
    sort(querys.begin(), querys.end());

    //pre proceso de monotone stacks
    //der a izq
    pila.push(n+1);
    repa(i,n,1) {
        while (pila.top() < arr[i]) pila.pop();
        sig[arr[i]].second = pila.top();
        pila.push(arr[i]);
    }

    // de izq a der
    while (!pila.empty()) pila.pop();
    pila.push(n+1);
    rep(i,1,n) {
        while (pila.top() < arr[i]) pila.pop();
        sig[arr[i]].first = pila.top();
        pila.push(arr[i]);
    }

    //activa los nodos y haz el primer shuffle
    lli mitad = (n/2);
    lli dif,s,pos = 1;

    p_arr[n+1] = n+1;
    arr[n+1] = n+1;
    while (pos <= n) {

        s = p_arr[ sig[arr[pos]].second ];
        if (pos <= mitad && s > mitad) s = mitad+1;
        dif = s - pos;

        update(1,1,offset,arr[pos],arr[pos],dif);

        pos = s;
    }

    apu = 0;
    t = 1;
    while (apu < querys.size()) {
        //responde querys

        while (apu < querys.size() && querys[apu].first == t) {
            a = busca(1,1,offset,querys[apu].p);
            b = suma(1,1,offset,1,a-1);

            b++;
            b = querys[apu].p - b;

            res[querys[apu].id] = arr[ p_arr[a] + b];
            apu++;
        }
        if (apu == querys.size()) break;

        //shuffle
        t++;
        a = busca(1,1,offset,(n/2)+1);
        b = suma(1,1,offset,1,a-1);

        if (b == (n/2)) {
            //se termino
            rep(i,apu,querys.size()-1) querys[i].first = t;
            continue;
        }

        dif = (n/2) - b;
        comp = stree[offset+a-1];
        pos = p_arr[a] + dif;
        update(1,1,offset,a,a,dif);

        while (pos < p_arr[a]+comp) {
            s = p_arr[ sig[arr[pos]].second ];
            if (s >= p_arr[a]+comp) s = p_arr[a]+comp;

            dif = s - pos;
            update(1,1,offset,arr[pos],arr[pos],dif);
            pos = s;
        }

    }

    rep(i,1,q) cout << res[i] << "\n";

    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:117:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |     while (apu < querys.size()) {
      |            ~~~~^~~~~~~~~~~~~~~
Main.cpp:120:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |         while (apu < querys.size() && querys[apu].first == t) {
      |                ~~~~^~~~~~~~~~~~~~~
Main.cpp:130:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |         if (apu == querys.size()) break;
      |             ~~~~^~~~~~~~~~~~~~~~
Main.cpp:7:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 | #define rep(i,a,b) for(int i = (a); i <= (b); i++)
      |                                       ^
Main.cpp:139:13: note: in expansion of macro 'rep'
  139 |             rep(i,apu,querys.size()-1) querys[i].first = t;
      |             ^~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 408 ms 43348 KB Output is correct
2 Correct 393 ms 42904 KB Output is correct
3 Correct 388 ms 41516 KB Output is correct
4 Correct 326 ms 39348 KB Output is correct
5 Correct 401 ms 42460 KB Output is correct
6 Correct 331 ms 40284 KB Output is correct
7 Correct 355 ms 42672 KB Output is correct
8 Correct 370 ms 40456 KB Output is correct
9 Correct 333 ms 39792 KB Output is correct
10 Correct 364 ms 40632 KB Output is correct
11 Correct 350 ms 40480 KB Output is correct
12 Correct 306 ms 36448 KB Output is correct
13 Correct 361 ms 39616 KB Output is correct
14 Correct 344 ms 41588 KB Output is correct
15 Correct 380 ms 40812 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 135 ms 17704 KB Output is correct
18 Correct 234 ms 28676 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 444 ms 62076 KB Output is correct
2 Correct 409 ms 62180 KB Output is correct
3 Correct 348 ms 49560 KB Output is correct
4 Correct 334 ms 49844 KB Output is correct
5 Correct 366 ms 50980 KB Output is correct
6 Correct 338 ms 49072 KB Output is correct
7 Correct 376 ms 60764 KB Output is correct
8 Correct 380 ms 58240 KB Output is correct
9 Correct 383 ms 50760 KB Output is correct
10 Correct 358 ms 57124 KB Output is correct
11 Correct 345 ms 48684 KB Output is correct
12 Correct 316 ms 48172 KB Output is correct
13 Correct 406 ms 56552 KB Output is correct
14 Correct 325 ms 49756 KB Output is correct
15 Correct 405 ms 58616 KB Output is correct
16 Correct 20 ms 9548 KB Output is correct
17 Correct 186 ms 33744 KB Output is correct
18 Correct 292 ms 44784 KB Output is correct
19 Correct 56 ms 12352 KB Output is correct
20 Correct 93 ms 21048 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 10828 KB Output is correct
2 Correct 78 ms 11084 KB Output is correct
3 Correct 106 ms 10476 KB Output is correct
4 Correct 59 ms 10212 KB Output is correct
5 Correct 82 ms 10540 KB Output is correct
6 Correct 53 ms 10064 KB Output is correct
7 Correct 61 ms 10492 KB Output is correct
8 Correct 60 ms 10120 KB Output is correct
9 Correct 69 ms 10312 KB Output is correct
10 Correct 48 ms 9920 KB Output is correct
11 Correct 49 ms 10184 KB Output is correct
12 Correct 58 ms 9936 KB Output is correct
13 Correct 48 ms 10152 KB Output is correct
14 Correct 47 ms 10300 KB Output is correct
15 Correct 45 ms 9892 KB Output is correct
16 Correct 10 ms 5588 KB Output is correct
17 Correct 36 ms 8252 KB Output is correct
18 Correct 33 ms 7892 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct

Subtask #4
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 408 ms 43348 KB Output is correct
2 Correct 393 ms 42904 KB Output is correct
3 Correct 388 ms 41516 KB Output is correct
4 Correct 326 ms 39348 KB Output is correct
5 Correct 401 ms 42460 KB Output is correct
6 Correct 331 ms 40284 KB Output is correct
7 Correct 355 ms 42672 KB Output is correct
8 Correct 370 ms 40456 KB Output is correct
9 Correct 333 ms 39792 KB Output is correct
10 Correct 364 ms 40632 KB Output is correct
11 Correct 350 ms 40480 KB Output is correct
12 Correct 306 ms 36448 KB Output is correct
13 Correct 361 ms 39616 KB Output is correct
14 Correct 344 ms 41588 KB Output is correct
15 Correct 380 ms 40812 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 135 ms 17704 KB Output is correct
18 Correct 234 ms 28676 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 444 ms 62076 KB Output is correct
22 Correct 409 ms 62180 KB Output is correct
23 Correct 348 ms 49560 KB Output is correct
24 Correct 334 ms 49844 KB Output is correct
25 Correct 366 ms 50980 KB Output is correct
26 Correct 338 ms 49072 KB Output is correct
27 Correct 376 ms 60764 KB Output is correct
28 Correct 380 ms 58240 KB Output is correct
29 Correct 383 ms 50760 KB Output is correct
30 Correct 358 ms 57124 KB Output is correct
31 Correct 345 ms 48684 KB Output is correct
32 Correct 316 ms 48172 KB Output is correct
33 Correct 406 ms 56552 KB Output is correct
34 Correct 325 ms 49756 KB Output is correct
35 Correct 405 ms 58616 KB Output is correct
36 Correct 20 ms 9548 KB Output is correct
37 Correct 186 ms 33744 KB Output is correct
38 Correct 292 ms 44784 KB Output is correct
39 Correct 56 ms 12352 KB Output is correct
40 Correct 93 ms 21048 KB Output is correct
41 Correct 90 ms 10828 KB Output is correct
42 Correct 78 ms 11084 KB Output is correct
43 Correct 106 ms 10476 KB Output is correct
44 Correct 59 ms 10212 KB Output is correct
45 Correct 82 ms 10540 KB Output is correct
46 Correct 53 ms 10064 KB Output is correct
47 Correct 61 ms 10492 KB Output is correct
48 Correct 60 ms 10120 KB Output is correct
49 Correct 69 ms 10312 KB Output is correct
50 Correct 48 ms 9920 KB Output is correct
51 Correct 49 ms 10184 KB Output is correct
52 Correct 58 ms 9936 KB Output is correct
53 Correct 48 ms 10152 KB Output is correct
54 Correct 47 ms 10300 KB Output is correct
55 Correct 45 ms 9892 KB Output is correct
56 Correct 10 ms 5588 KB Output is correct
57 Correct 36 ms 8252 KB Output is correct
58 Correct 33 ms 7892 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 595 ms 62244 KB Output is correct
62 Correct 626 ms 62024 KB Output is correct
63 Correct 666 ms 59240 KB Output is correct
64 Correct 551 ms 58300 KB Output is correct
65 Correct 547 ms 60688 KB Output is correct
66 Correct 489 ms 58092 KB Output is correct
67 Correct 497 ms 60280 KB Output is correct
68 Correct 516 ms 58056 KB Output is correct
69 Correct 570 ms 58196 KB Output is correct
70 Correct 509 ms 57712 KB Output is correct
71 Correct 447 ms 56796 KB Output is correct
72 Correct 490 ms 57240 KB Output is correct
73 Correct 462 ms 57448 KB Output is correct
74 Correct 485 ms 58824 KB Output is correct
75 Correct 478 ms 59052 KB Output is correct
76 Correct 20 ms 9548 KB Output is correct
77 Correct 208 ms 34164 KB Output is correct
78 Correct 291 ms 42284 KB Output is correct
79 Correct 0 ms 340 KB Output is correct
80 Correct 0 ms 340 KB Output is correct