Submission #973471

#	Time	Username	Problem	Language	Result	Execution time	Memory
973471		sleepntsheep	Unscrambling a Messy Bug (IOI16_messy)	C11	100 / 100	4 ms	2400 KiB

messy

#include "messy_c.h"
#define N 128

void solve_add(int n, int w, int r, int x, int y)
{
    if (x == y) return;

    char ask[N+1]={0};

    for(int i=0;i<n;++i)ask[i]='0' + (i<x||i>y);

    int m = x+(y-x)/2;
    for(int i=x;i<=m;++i)
    {
        ask[i]='1';
        add_element(ask);
        ask[i]='0';
    }
    solve_add(n, w, r, x, m);
    solve_add(n, w, r, m+1, y);
}

void solve_restore(int n, int w, int r, int x, int y, int *mapped, int *result)
{
    if (x == y) { result[x] = mapped[0]; return; }

    char ask[N+1]={0};

    for(int i=0;i<n;++i)ask[i]='1';
    for(int i=x;i<=y;++i)ask[mapped[i-x]]='0';

    int nmapped[N],no=0,mmapped[N],mo=0;
    int m=x+(y-x)/2;

    for(int i=x;i<=y;++i)
    {
        ask[mapped[i-x]]='1';
        if(check_element(ask))
            nmapped[no++]=mapped[i-x];
        else
            mmapped[mo++]=mapped[i-x];
        ask[mapped[i-x]]='0';
    }
    solve_restore(n, w, r, x, m, nmapped, result);
    solve_restore(n, w, r, m+1, y, mmapped, result);
}

void restore_permutation(int n, int w, int r, int* result)
{
    solve_add(n, w, r, 0, n-1);
    compile_set();

    int mapped[N], iresult[N];
    for (int i = 0; i < n; ++i) mapped[i] = i;
    solve_restore(n, w, r, 0, n-1, mapped, iresult);
    for (int i=0;i<n;++i)result[iresult[i]]=i;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30