Submission #1088452

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088452		MateiKing80	Coreputer (IOI23_coreputer)	C++17	100 / 100	1 ms	596 KiB

coreputer

#include "coreputer.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> malfunctioning_cores(int N)
{
    vector<int> id(N);
    iota(id.begin(), id.end(), 0);
    vector<int> ans(N, 0), res(N, -2);

    int l = 0, r = N - 1;
    while(l <= r)
    {
        int m = (l + r) / 2;
        res[m] = run_diagnostic(vector<int>(id.begin(), id.begin() + m + 1));
        if(res[m] == -1)
            l = m + 1;
        else r = m - 1;
    }

    ans[l] = 1;
    if(l == N - 1)
        return ans;
    if(l == 0)
    {
        if(run_diagnostic({0}) != 0)
            return ans;

        int L = 1, R = N - 1;
        while(L <= R)
        {
            int M = (L + R) / 2;

            if(res[M] == -2)
                res[M] = run_diagnostic(vector<int>(id.begin(), id.begin() + M + 1));
            if(res[M] == 0)
                L = M + 1;
            else R = M-1;
        }
        ans[L] = 1;
        return ans;
    }

    vector<int> v(id.begin(), id.begin()+l);
    for(int i = l + 1; i < N; i ++)
    {
        v.push_back(i);
        if(run_diagnostic(v) != -1)
            ans[i] = 1, v.pop_back();
    }
    v = vector<int>(id.begin() + l + 1, id.end());
    if(!res[l])
    {
        while(!v.empty() && !ans[v.back()])
            v.pop_back();
        v.pop_back();
    }
    for(int i = l - 1; i > 0; i --)
    {
        v.push_back(i);
        if(run_diagnostic(v) != -1)
            ans[i] = 1, v.pop_back();
    }

    int c1 = 0, c2 = 0;
    for(int i = l; i > 0; i --)
        c1 += ans[i];
    for(int i = l + 1; i < N; i ++)
        c2 += ans[i];
    if((res[l] == 0 && c1 < c2) || (res[l] == 1 && c1 == c2))
        ans[0] = 1;
    return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40