oj.uz

Submission #351131

# Submission time Handle Problem Language Result Execution time Memory
351131 2021-01-19T12:45:19 Z blue Xylophone (JOI18_xylophone) C++11
100 / 100
 87 ms 384 KB 
#include "xylophone.h"
#include <iostream>
#include <vector>
using namespace std;


/*
13 queries to find pos(N)

1 query for pos(N)+1

For i = pos(N)+2 .. N:
    query(i-1, i)
    query(i-2, i)
    Figure out i

Do the same for i = 1..pos(1)-2

For pos(1) < i < pos(N):

*/

void debug(int y)
{
    cout << y << '\n';
}

void debug(string S)
{
    cout << S << '\n';
}

void debug(string S, int a, int b)
{
    cout << S << ' ' << a << ' ' << b << '\n';
}

// ----------------------------------------------------------------------------

int n;

int searchN(int a, int b)
{
    // debug("searchN", a, b);
    if(a == b) return a;
    int m = (a+b)/2;
    if(query(1, m) == n-1) return searchN(a, m);
    else return searchN(m+1, b);
}

vector<int> pos(5001, 0);
vector<int> A(5001, 0);

bool occ(int a)  //occupied?
{
    return (a < 1) || (n < a) || (pos[a] != 0);
}

void assign(int p, int a)
{
    pos[a] = p;
    A[p] = a;
    answer(p, a);
}

void solve(int N)
{
    // debug(111);
    n = N;
    assign( searchN(2, N), N );


    //after N
    if(pos[N] < N)
    {
        assign(pos[N] + 1, N - query(pos[N], pos[N] + 1));
    }
    // debug(555);
    for(int i = pos[N]+2; i <= N; i++)
    {
        // debug(i);
        int X1 = query(i-1, i);

        if(occ(A[i-1] + X1)) assign(i, A[i-1] - X1);
        else if(occ(A[i-1] - X1)) assign(i, A[i-1] + X1);
        else
        {
            int X2 = query(i-2, i);

            if(X2 == abs(A[i-1] - A[i-2]))
            {
                if(A[i-2] < A[i-1])
                {
                    //A[i-2] < A[i] < A[i-1]
                    assign(i, A[i-1] - X1);
                }
                else
                {
                    //A[i-1] < A[i] < A[i-2]
                    assign(i, A[i-1] + X1);
                }
            }
            else
            {
                if(A[i-2] < A[i-1] && X1 > X2)
                {
                    //A[i] < A[i-2] < A[i-1]
                    assign(i, A[i-1] - X1);
                }
                else if(A[i-2] < A[i-1] && X1 < X2)
                {
                    //A[i-2] < A[i-1] < A[i]
                    assign(i, A[i-1] + X1);
                }
                else if(A[i-1] < A[i-2] && X1 > X2)
                {
                    //A[i-1] < A[i-2] < A[i]
                    assign(i, A[i-1] + X1);
                }
                else if(A[i-1] < A[i-2] && X1 < X2)
                {
                    //A[i] < A[i-1] < A[i-2]
                    assign(i, A[i-1] - X1);
                }
                else if(A[i-1] < A[i-2] && X1 == X2)
                {
                    assign(i, A[i-1] + X1);
                }
                else// if(A[i-1] > A[i-2] && X1 == X2)
                {
                    assign(i, A[i-1] - X1);
                }
            }
        }
    }








    assign(pos[N] - 1, N - query(pos[N] - 1, pos[N]));
    for(int i = pos[N]-2; i >= 1; i--)
    {
        // debug("new i = ");
        // debug(i);

        int X1 = query(i, i+1);

        if(occ(A[i+1] + X1)) assign(i, A[i+1] - X1);
        else if(occ(A[i+1] - X1)) assign(i, A[i+1] + X1);
        else
        {
            int X2 = query(i, i+2);

            if(X2 == abs(A[i+1] - A[i+2]))
            {
                if(A[i+2] < A[i+1])
                {
                    //A[i-2] < A[i] < A[i-1]
                    assign(i, A[i+1] - X1);
                }
                else
                {
                    //A[i-1] < A[i] < A[i-2]
                    assign(i, A[i+1] + X1);
                }
            }
            else
            {
                if(A[i+2] < A[i+1] && X1 > X2)
                {
                    //A[i] < A[i-2] < A[i-1]
                    assign(i, A[i+1] - X1);
                }
                else if(A[i+2] < A[i+1] && X1 < X2)
                {
                    //A[i-2] < A[i-1] < A[i]
                    assign(i, A[i+1] + X1);
                }
                else if(A[i+1] < A[i+2] && X1 > X2)
                {
                    //A[i-1] < A[i-2] < A[i]
                    assign(i, A[i+1] + X1);
                }
                else if(A[i+1] < A[i+2] && X1 < X2)
                {
                    //A[i] < A[i-1] < A[i-2]
                    assign(i, A[i+1] - X1);
                }
                else if(A[i+1] < A[i+2] && X1 == X2)
                {
                    assign(i, A[i+1] + X1);
                }
                else// if(A[i-1] > A[i-2] && X1 == X2)
                {
                    assign(i, A[i+1] - X1);
                }
            }
        }
    }
}


//----------------------------------------------------------------------

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct
5 Correct 2 ms 364 KB Output is correct
6 Correct 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 2 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 2 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct
5 Correct 2 ms 364 KB Output is correct
6 Correct 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 2 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 2 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 4 ms 364 KB Output is correct
17 Correct 9 ms 364 KB Output is correct
18 Correct 10 ms 364 KB Output is correct
19 Correct 13 ms 384 KB Output is correct
20 Correct 18 ms 364 KB Output is correct
21 Correct 11 ms 364 KB Output is correct
22 Correct 14 ms 364 KB Output is correct
23 Correct 10 ms 364 KB Output is correct
24 Correct 9 ms 364 KB Output is correct
25 Correct 9 ms 364 KB Output is correct
26 Correct 13 ms 364 KB Output is correct
27 Correct 18 ms 364 KB Output is correct
28 Correct 16 ms 364 KB Output is correct
29 Correct 17 ms 364 KB Output is correct
30 Correct 14 ms 364 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct
5 Correct 2 ms 364 KB Output is correct
6 Correct 2 ms 364 KB Output is correct
7 Correct 2 ms 364 KB Output is correct
8 Correct 2 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 2 ms 364 KB Output is correct
12 Correct 2 ms 364 KB Output is correct
13 Correct 2 ms 364 KB Output is correct
14 Correct 2 ms 364 KB Output is correct
15 Correct 2 ms 364 KB Output is correct
16 Correct 4 ms 364 KB Output is correct
17 Correct 9 ms 364 KB Output is correct
18 Correct 10 ms 364 KB Output is correct
19 Correct 13 ms 384 KB Output is correct
20 Correct 18 ms 364 KB Output is correct
21 Correct 11 ms 364 KB Output is correct
22 Correct 14 ms 364 KB Output is correct
23 Correct 10 ms 364 KB Output is correct
24 Correct 9 ms 364 KB Output is correct
25 Correct 9 ms 364 KB Output is correct
26 Correct 13 ms 364 KB Output is correct
27 Correct 18 ms 364 KB Output is correct
28 Correct 16 ms 364 KB Output is correct
29 Correct 17 ms 364 KB Output is correct
30 Correct 14 ms 364 KB Output is correct
31 Correct 25 ms 364 KB Output is correct
32 Correct 40 ms 364 KB Output is correct
33 Correct 51 ms 364 KB Output is correct
34 Correct 36 ms 364 KB Output is correct
35 Correct 75 ms 364 KB Output is correct
36 Correct 43 ms 364 KB Output is correct
37 Correct 34 ms 364 KB Output is correct
38 Correct 62 ms 364 KB Output is correct
39 Correct 35 ms 364 KB Output is correct
40 Correct 66 ms 364 KB Output is correct
41 Correct 61 ms 364 KB Output is correct
42 Correct 51 ms 364 KB Output is correct
43 Correct 47 ms 364 KB Output is correct
44 Correct 58 ms 364 KB Output is correct
45 Correct 80 ms 364 KB Output is correct
46 Correct 79 ms 364 KB Output is correct
47 Correct 61 ms 364 KB Output is correct
48 Correct 62 ms 364 KB Output is correct
49 Correct 69 ms 364 KB Output is correct
50 Correct 87 ms 364 KB Output is correct
51 Correct 67 ms 364 KB Output is correct
52 Correct 34 ms 364 KB Output is correct
53 Correct 59 ms 364 KB Output is correct
54 Correct 58 ms 364 KB Output is correct
55 Correct 37 ms 364 KB Output is correct
56 Correct 55 ms 364 KB Output is correct
57 Correct 57 ms 364 KB Output is correct
58 Correct 60 ms 384 KB Output is correct
59 Correct 59 ms 364 KB Output is correct
60 Correct 59 ms 364 KB Output is correct