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Submission #795280

# Submission time Handle Problem Language Result Execution time Memory
795280 2023-07-27T08:02:16 Z finn__ Bit Shift Registers (IOI21_registers) C++17
47 / 100
 1 ms 340 KB 
#include "registers.h"
#include <vector>
#include <iostream>

constexpr size_t B = 2000;
constexpr int ONE = 50, ALL_ONES = 51, MASK = 52, K_MASK = 53, ALL_ZEROS = 54;

void construct_instructions(int s, int n, int k, int q)
{
    std::vector<bool> r(B);
    r[0] = 1;
    append_store(ONE, r);
    fill(r.begin() + 1, r.end(), 1);
    append_store(ALL_ONES, r);
    fill(r.begin(), r.end(), 0);
    for (int i = k; i < B; i += k)
        r[i] = 1;
    append_store(MASK, r);
    fill(r.begin() + k, r.end(), 0);
    fill(r.begin(), r.begin() + k, 1);
    append_store(K_MASK, r);
    fill(r.begin(), r.end(), 0);
    append_store(ALL_ZEROS, r);

    // writes min in a, max in b
    auto append_swap = [&](int a, int b)
    {
        append_not(40, a);
        append_add(40, 40, ONE);
        append_add(40, 40, b); // 40 : b - a

        append_xor(41, 40, a);
        append_xor(41, 41, b); // 41 : (b - a) ^ a ^ b
        append_and(40, 41, MASK);
        append_right(41, 40, k);
        append_not(41, 41);
        append_add(41, 41, ONE);
        append_add(42, 40, 41); // 42 : 1-mask if a > b, else 0-mask

        append_xor(43, a, b);
        append_and(43, 43, 42); // 43 : a_i ^ b_i if a_i > b_i
        append_xor(a, a, 43);   // a_i = min(a_i, b_i)
        append_xor(b, b, 43);   // b_i = max(a_i, b_I)
    };

    if (!s)
    {
        int l = 64;
        append_left(2, ALL_ONES, n * k);
        append_or(0, 0, 2);
        append_move(1, 0);
        append_right(0, 0, l * k); // 0 : upper half
        append_left(2, ALL_ONES, l * k);
        append_or(1, 1, 2); // 1 : lower half
        append_print(0);
        append_print(1);

        while (l)
        {
            append_swap(0, 1);
            l >>= 1;
            append_move(1, 0);
            append_right(0, 0, l * k);
            append_left(2, ALL_ONES, l * k);
            append_or(1, 1, 2);
            append_print(0);
            append_print(1);
        }
    }
    else
    {
        for (int i = 0; i < n; ++i)
        {
            if (!(i & 1))
            {
                append_right(10, 0, i - i / 2);
                append_left(11, K_MASK, i / 2);
                append_and(10, 10, 11);
                append_or(2, 2, 10);
            }
            else
            {
                append_right(10, 0, i - i / 2);
                append_left(11, K_MASK, i / 2);
                append_and(10, 10, 11);
                append_or(3, 3, 10);
            }
        }

        append_left(10, ALL_ONES, ((n + 1) / 2) * k);
        append_or(2, 2, 10);
        append_left(10, ALL_ONES, (n / 2) * k);
        append_or(3, 3, 10);

        for (int j = 0; j < 2 * n - 3; ++j)
        {
            append_swap(2, 3);
            if (!(j & 1))
            {
                append_left(3, 3, k);
                append_or(3, 3, K_MASK);
            }
            else
            {
                append_right(3, 3, k);
            }
        }

        append_move(0, ALL_ZEROS);
        for (int i = 0; i < n; ++i)
        {
            if (!(i & 1))
            {
                append_left(10, 2, i - i / 2);
                append_left(11, K_MASK, i);
                append_and(10, 10, 11);
                append_or(0, 0, 10);
            }
            else
            {
                append_left(10, 3, i - i / 2);
                append_left(11, K_MASK, i);
                append_and(10, 10, 11);
                append_or(0, 0, 10);
            }
        }
    }
}

Compilation message

registers.cpp: In function 'void construct_instructions(int, int, int, int)':
registers.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'const size_t' {aka 'const long unsigned int'} [-Wsign-compare]
   16 |     for (int i = k; i < B; i += k)
      |                     ~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct

Subtask #2
0.0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Wrong answer detected in grader
2 Halted 0 ms 0 KB -

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Incorrect sorting
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Incorrect sorting
2 Halted 0 ms 0 KB -