Submission #1002117

#	Time	Username	Problem	Language	Result	Execution time	Memory
1002117		c2zi6	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	1 ms	632 KiB

messy

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "messy.h"

string inv(string s) {
    if (s == "W") return s;
    for (char& ch : s) ch = '1' - ch + '0';
    return s;
}

vector<string> dirs;
int n;
void ranges(int L, int R, string t) {
    if (R-L+1 == 1) return;
    /*cout << "RANGE: " << L+1 << " " << R+1 << endl;*/
    int M = (L + R) / 2;

    if (t == "W") {
        string s(n, '1');
        replr(i, L, R) s[i] = '0';
        int cnt = 0;
        replr(i, 0, n-1) if (cnt < (R-L+1)/2 && s[i] == '0') {
            s[i] = '1';
            add_element(s);
            s[i] = '0';
            cnt++;
        }
        ranges(M+1, R, t);
        ranges(L, M, t);
    } else {
        string s = t;
        replr(i, 0, n-1) if (t[i] == '0') {
            s[i] = '1';
            if (check_element(s)) {
                t[i] = '1';
            }
            s[i] = '0';
        }
        /*cout << t << endl;*/
        rep(i, n) if (s[i] == '0') {
            if (t[i] == '1') {
                dirs[i].pb('L');
            } else {
                dirs[i].pb('R');
            }
        }
        ranges(M+1, R, t);
        rep(i, n) if (s[i] == '0') t[i] = '1' - t[i] + '0';
        ranges(L, M, t);
    }
}

int getnum(string s) {
    int l = 0;
    int r = n-1;
    for (char ch : s) {
        int m = (l+r)/2;
        if (ch == 'L') r = m;
        else l = m+1;
    }
    return l;
}

VI restore_permutation(int N, int w, int r) {n = N;
    ranges(0, n-1, "W");
    compile_set();
    dirs = vector<string>(n);
    ranges(0, n-1, string(n, '0'));
    VI ret;
    for (string s : dirs) {
        ret.pb(getnum(s));
        /*cout << getnum(s) << " "; cout << endl;*/
    }
    return ret;
}

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