Submission #1030716

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030716		coolboy19521	Data Transfer (IOI19_transfer)	C++17	0 / 100	2 ms	1040 KiB

transfer

#include "transfer.h"

using namespace std;

vector<int> get_attachment(vector<int> source) {
    int n = source.size();
    int xs = 0;

    for (int i = 1; i <= n; i ++)
        xs ^= source[i - 1] * i;

    vector<int> v;
    if (63 == n)
        for (int i = 0; i < 7; i ++)
            v.push_back(xs & (1 << i));
    else
        for (int i = 0; i < 9; i ++)
            v.push_back(xs & (1 << i));
    return v;
}

vector<int> retrieve(vector<int> data) {
    vector<int> v;
    int m = data.size();
    int xs = 0;
    if (70 == m) {
        for (int i = 63; i < 70; i ++)
            xs |= data[i] * (1 << (i - 63));
        m -= 7;
    } else {
        for (int i = 255; i < 264; i ++)
            xs |= data[i] * (1 << (i - 255));
        m -= 9;
    }
    int axs = 0;
    for (int i = 1; i <= m; i ++)
        axs ^= data[i - 1] * i;
    for (int i = 1; i <= m; i ++) {
        int b = 1 - data[i - 1];
        if ((axs ^ (b * i)) == xs) {
            v.push_back(b);
            axs = xs;
        } else
            v.push_back(1 - b);
    }
    return v;
}

• Subtask 1: 0 / 60
• Subtask 2: 0 / 40