oj.uz

Submission #757049

# Submission time Handle Problem Language Result Execution time Memory
757049 2023-06-12T12:59:32 Z doowey Sequence (APIO23_sequence) C++17
28 / 100
 2000 ms 45764 KB 
#include "sequence.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair

const int N = (int)5e5 + 10;
vector<int> pos[N];
int A[N];
int n;

struct Node{
    int low;
    int high;
    int lazy;
};

Node T[N * 4 + 512];

void build(int node, int cl, int cr){
    T[node].low = T[node].high = T[node].lazy = 0;
    if(cl == cr){
        T[node].low = T[node].high = cl;
        T[node].lazy = 0;
        return;
    }
    int mid = (cl + cr) / 2;
    build(node * 2, cl, mid);
    build(node * 2 + 1, mid + 1, cr);
    T[node].low=min(T[node*2].low, T[node*2+1].low);
    T[node].high=max(T[node*2].high,T[node*2+1].high);
}

void push(int node, int cl, int cr){
    T[node].high += T[node].lazy;
    T[node].low += T[node].lazy;
    if(cl != cr){
        T[node * 2].lazy += T[node].lazy;
        T[node * 2 + 1].lazy += T[node].lazy;
    }
    T[node].lazy = 0;
}

void update_segm(int node, int cl, int cr, int tl, int tr, int d){
    push(node, cl, cr);
    if(cr < tl || cl > tr) return;
    if(cl >= tl && cr <= tr){
        T[node].lazy = d;
        push(node, cl, cr);
        return;
    }
    int mid = (cl + cr) / 2;
    update_segm(node * 2, cl, mid, tl, tr, d);
    update_segm(node * 2 + 1, mid + 1, cr, tl, tr, d);
    T[node].low=min(T[node*2].low, T[node*2+1].low);
    T[node].high=max(T[node*2].high,T[node*2+1].high);
}


pii get_val(int node, int cl, int cr, int tl, int tr){
    push(node, cl, cr);
    if(cr < tl || cl > tr) return mp((int)1e9, -(int)1e9);
    if(cl >= tl && cr <= tr){
        return mp(T[node].low, T[node].high);
    }
    int mid = (cl + cr) / 2;
    pii L = get_val(node * 2, cl, mid, tl, tr);
    pii R = get_val(node * 2 + 1, mid + 1, cr, tl, tr);
    return mp(min(L.fi, R.fi), max(L.se, R.se));
}

mt19937 gene(chrono::steady_clock::now().time_since_epoch().count());

int numo(int m){
    return ((int)gene() % m + m) % m;
}

bool check(int cnt){
    build(1, 0, n);
    int bal;
    int l, r;
    pii suf;
    pii lE;
    pii rE;
    pii lef;
    int take;
    for(int cand = 1; cand <= n; cand ++ ){
        for(auto x : pos[cand]){
            update_segm(1, 0, n, x, n, -1);
        }
        for(int j = 0 ; j + cnt - 1 < pos[cand].size(); j ++ ){
            l = pos[cand][j];
            r = pos[cand][j + cnt - 1];
            lE = get_val(1, 0, n, l - 1, l - 1);
            rE = get_val(1, 0, n, r, r);
            bal = rE.fi - lE.fi;
            suf = get_val(1, 0, n, r, n);
            lef = get_val(1, 0, n, 0, l - 1);
            suf.fi -= rE.fi;
            suf.se -= rE.se;
            lef = mp(-lef.se, -lef.fi);
            lef.fi += lE.fi;
            lef.se += lE.fi;
            bal += lef.fi + suf.fi;
            take = max(0, (-cnt) - bal);
            if(bal <= cnt && take <= (lef.se - lef.fi) + (suf.se - suf.fi)){
                return true;
            }
        }
        for(auto x : pos[cand]){
            update_segm(1, 0, n, x, n, -1);
        }
    }
    return false;
}

int sequence(int _n, vector<int> a) {
    n = _n;
    for(int i = 0 ; i < n; i ++ ){
        A[i + 1] = a[i];
        pos[A[i + 1]].push_back(i + 1);
    }
    int l = 1, r = n + 1;
    int mid;
    while(l + 1 < r){
        mid = l + (r - l) / 2;
        if(check(mid)){
            l = mid;
        }
        else{
            r = mid;
        }
    }
    for(int iter = l + 12; iter >= l ; iter -- ){
        if(iter <= n && check(iter)) return iter;
    }
    return l;
}

Compilation message

sequence.cpp: In function 'bool check(int)':
sequence.cpp:97:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |         for(int j = 0 ; j + cnt - 1 < pos[cand].size(); j ++ ){
      |                         ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12056 KB Output is correct
3 Correct 7 ms 12060 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 7 ms 12048 KB Output is correct
11 Correct 7 ms 12116 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12056 KB Output is correct
3 Correct 7 ms 12060 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 7 ms 12048 KB Output is correct
11 Correct 7 ms 12116 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 30 ms 12116 KB Output is correct
14 Correct 26 ms 12168 KB Output is correct
15 Correct 26 ms 12240 KB Output is correct
16 Correct 25 ms 12116 KB Output is correct
17 Correct 25 ms 12148 KB Output is correct
18 Correct 23 ms 12200 KB Output is correct
19 Correct 25 ms 12164 KB Output is correct
20 Correct 25 ms 12168 KB Output is correct
21 Correct 28 ms 12072 KB Output is correct
22 Correct 29 ms 12172 KB Output is correct

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Execution timed out 2097 ms 40140 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12056 KB Output is correct
2 Execution timed out 2066 ms 32412 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2068 ms 45764 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12056 KB Output is correct
3 Correct 7 ms 12060 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 7 ms 12048 KB Output is correct
11 Correct 7 ms 12116 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 30 ms 12116 KB Output is correct
14 Correct 26 ms 12168 KB Output is correct
15 Correct 26 ms 12240 KB Output is correct
16 Correct 25 ms 12116 KB Output is correct
17 Correct 25 ms 12148 KB Output is correct
18 Correct 23 ms 12200 KB Output is correct
19 Correct 25 ms 12164 KB Output is correct
20 Correct 25 ms 12168 KB Output is correct
21 Correct 28 ms 12072 KB Output is correct
22 Correct 29 ms 12172 KB Output is correct
23 Correct 1609 ms 17664 KB Output is correct
24 Correct 1551 ms 17868 KB Output is correct
25 Correct 1593 ms 17668 KB Output is correct
26 Correct 1308 ms 16756 KB Output is correct
27 Correct 1392 ms 16852 KB Output is correct
28 Correct 1409 ms 16740 KB Output is correct
29 Correct 1203 ms 16484 KB Output is correct
30 Correct 1205 ms 16588 KB Output is correct
31 Correct 431 ms 16520 KB Output is correct
32 Correct 1268 ms 18596 KB Output is correct
33 Correct 1288 ms 17492 KB Output is correct
34 Incorrect 1510 ms 17612 KB Output isn't correct
35 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 7 ms 12056 KB Output is correct
3 Correct 7 ms 12060 KB Output is correct
4 Correct 7 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 7 ms 11988 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 7 ms 12048 KB Output is correct
11 Correct 7 ms 12116 KB Output is correct
12 Correct 6 ms 11988 KB Output is correct
13 Correct 30 ms 12116 KB Output is correct
14 Correct 26 ms 12168 KB Output is correct
15 Correct 26 ms 12240 KB Output is correct
16 Correct 25 ms 12116 KB Output is correct
17 Correct 25 ms 12148 KB Output is correct
18 Correct 23 ms 12200 KB Output is correct
19 Correct 25 ms 12164 KB Output is correct
20 Correct 25 ms 12168 KB Output is correct
21 Correct 28 ms 12072 KB Output is correct
22 Correct 29 ms 12172 KB Output is correct
23 Execution timed out 2097 ms 40140 KB Time limit exceeded
24 Halted 0 ms 0 KB -