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Submission #584014

# Submission time Handle Problem Language Result Execution time Memory
584014 2022-06-26T16:28:09 Z cheissmart Flight to the Ford (BOI22_communication) C++17
15 / 100
 50 ms 1800 KB 
#include"communication.h"
#include <bits/stdc++.h>
#define IO_OP ios::sync_with_stdio(0), cin.tie(0)
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

const int INF = 1e9 + 7;

int aux[] = {0b0000, 0b1001, 0b0110};

void encode(int n, int x) {
    for(int i = 0; i < 4; i++)
        send(aux[x - 1] >> i & 1);
}

pi decode(int n) {
    int x = 0;
    for(int i = 0; i < 4; i++)
        x |= receive() << i;

    vi ans;
    for(int k = 0; k < 3; k++)
        if(x == aux[k])
            ans.PB(k + 1);
    for(int i = 0; i < 4; i++) {
        int y = x ^ (1 << i);
        for(int k = 0; k < 3; k++)
            if(y == aux[k])
                ans.PB(k + 1);
        for(int j = 0; j < i - 1; j++) {
            int z = y ^ (1 << j);
            for(int k = 0; k < 3; k++)
                if(z == aux[k])
                    ans.PB(k + 1);
        }
    }
    while(SZ(ans) < 2) ans.PB(1);
    return {ans[0], ans[1]};
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 1796 KB Output is correct
2 Correct 11 ms 1800 KB Output is correct
3 Correct 17 ms 1700 KB Output is correct
4 Correct 13 ms 1748 KB Output is correct
5 Correct 12 ms 1680 KB Output is correct
6 Correct 23 ms 1776 KB Output is correct
7 Correct 50 ms 1684 KB Output is correct

Subtask #2
0.0 / 85.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 288 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -