Submission #650002

#	Time	Username	Problem	Language	Result	Execution time	Memory
650002		esomer	Unscrambling a Messy Bug (IOI16_messy)	C++17	0 / 100	3 ms	596 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
using namespace std;

#define ll long long
//#define endl "\n"

const int MOD = 998244353;

/*void add_element(string x);
void compile_set();
bool check_element(string x);*/

void add_lg(int n, int lg){
    string s = "";
    for(int i = 0; i < n; i++) s += '0';
    s[0] = '1';
    s[1] = '1';
    add_element(s);
    s[1] = '0';
    s[2] = '1';
    s[3] = '1';
    add_element(s);
    s[1] = '1';
    s[2] = '0';
    s[3] = '0';
    for(int i = 2; i < lg; i++){
        s[i] = '1';
        add_element(s);
    }
}

void check_lg(int n, int lg, vector<int>& possible, vector<int>& ind){
    string s = "";
    for(int i = 0; i < n; i++) s += '0';
    pair<int, int> initial = {-1, -1};
    for(int i = 0; i < lg && initial.first == -1; i++){
        for(int j = i + 1; j < lg && initial.first == -1; j++){
            for(int q = 0; q < lg; q++) s[possible[q]] = '0';
            s[possible[i]] = '1';
            s[possible[j]] = '1';
            bool rep = check_element(s);
            if(rep){
                initial = {i, j};
            }
        }
    }
    for(int i = 2; i < lg; i++){
        for(int j = 0; j < lg; j++){
            for(int q = 0; q < lg; q++) s[possible[q]] = '0';
            for(int q = i - 1; q >= 2; q--) s[ind[q]] = '1';
            s[initial.first] = '1';
            s[initial.second] = '1';
            if(s[possible[j]] == '1') continue;
            else if(i == lg - 1){
                for(int x : possible){
                    if(s[x] == '0') ind[i] = x;
                }
                break;
            }
            s[possible[j]] = '1';
            bool rep = check_element(s);
            if(rep){
                ind[i] = possible[j];
                break;
            }
        }
    }
    for(int q = 0; q < lg; q++) s[possible[q]] = '0';
    s[initial.first] = '1';
    s[ind[2]] = '1';
    s[ind[3]] = '1';
    bool rep = check_element(s);
    if(rep) {ind[0] = initial.first; ind[1] = initial.second;}
    else {ind[1] = initial.first; ind[0] = initial.second;}
}

vector<int> restore_permutation(int n, int w, int r){
    int lg = 0;
    int curr = 1;
    while(curr < n){
        lg++;
        curr *= 2;
    }
    vector<vector<bool>> v(n, vector<bool>(lg, 0));
    int num = (n - lg) / 2;
    if((n - lg) % 2 != 0) num++;
    curr = 0;
    int d = 4;
    for(int k = 0; k < lg; k++){
        int have = 1;
        //cout << "K "<< k << " num  "<< num << endl;
        for(int i = lg; i < n; i++){
            if(curr == num) {curr = 0; have = 1 - have;}
            //cout << ""
            v[i][k] = have;
            curr++;
        }
        num = (n - lg) / d;
        if((n - lg) % d != 0) num++;
        d *= 2;
    }
    for(int i = lg; i < n; i++){
        string s = "";
        for(int j = 0; j < n; j++) s += '0';
        s[i] = '1';
        add_element(s);
        for(int j = 0; j < lg; j++){
            if(v[i][j]) s[j] = '1';
            if(v[i][j]) add_element(s);
        }
    }
    add_lg(n, lg);
    compile_set();
    vector<vector<bool>> reconstruct(n, vector<bool>(lg, 0));
    vector<int> ind(lg);
    vector<int> possible;
    vector<bool> possible1(n, 0);
    for(int i = 0; i < n; i++){
        string s = "";
        for(int j = 0; j < n; j++) s += '0';
        s[i] = '1';
        bool rep = check_element(s);
        if(!rep) {possible.push_back(i); possible1[i] = 1;}
    }
    check_lg(n, lg, possible, ind);
    for(int k = 0; k < lg; k++){
        for(int i = 0; i < n; i++){
            if(possible1[i]) continue;
            string s = "";
            for(int j = 0; j < n; j++) s += '0';
            s[i] = '1';
            for(int j = 0; j < k; j++){
                if(reconstruct[i][j]) s[ind[j]] = '1';
            }
            s[ind[k]] = '1';
            bool rep = check_element(s);
            if(rep) reconstruct[i][k] = 1;
        }
    }
    /*for(int i = lg; i < n; i++){
        cout << "V[i] "<<i<< endl;
        for(auto x : v[i]) cout << x << " ";
        cout << endl;
    }*/
    vector<int> ans(n);
    for(int i = 0; i < n; i++){
        if(possible1[i]){
            for(int j = 0; j < lg; j++){
                if(ind[j] == i) ans[i] = j;
            }
        }else{
            for(int j = 0; j < n; j++){
                if(reconstruct[i] == v[j]) ans[i] = j;
            }
        }
        /*cout << "Reconstruct i "<< i << endl;
        for(auto x : reconstruct[i]) cout << x << " ";
        cout << endl;*/
    }
    return ans;
}
/*
namespace helper {

    set<string> set_;
    bool compiled = false;
    int n;
    vector<int> p;
    int w;
    int r;

    int read_int() {
        int x;
        cin >> x;
        return x;
    }

}

using namespace helper;


// A convenience function.
int get_p(int i) {
    int ret = p[i];
    return ret;
}

int main() {
    n = read_int();
    w = read_int();
    r = read_int();
    p = vector<int>(n);
    for (int i = 0; i < n; i++) {
        p[i] = read_int();
    }
    vector<int> answer = restore_permutation(n, w, r);
    for(int x : answer) cout << x << " ";
    cout << endl;
    cout << "Here"<< endl;
    return 0;
    if (answer.size() != n) {
        printf("WA\n");
        return 0;
    }


    printf("%d", answer[0]);

    for (int i = 1; i < n; i++) {
        printf(" %d", answer[i]);
    }
    printf("\n");
    return 0;
}

void wa() {
    printf("WA\n");
    exit(0);
}

bool check(const string& x) {
    if ((int)x.length() != n) {
        return false;
    }
    for (int i = 0; i < n; i++) {
        if (x[i] != '0' && x[i] != '1') {
            return false;
        }
    }
    return true;
}

void add_element(string x) {
    if (--w < 0 || compiled || !check(x)) {
        wa();
    }
    set_.insert(x);
}

bool check_element(string x) {
    if (--r < 0 || !compiled || !check(x)) {
        wa();
    }
    return set_.count(x);
}

void compile_set() {
    if (compiled) {
        wa();
    }
    compiled = true;
    set<string> compiledSet;
    string compiledElement = string(n, ' ');
    for (set<string>::iterator it = set_.begin(); it != set_.end(); it++) {
        string s = *it;
        for (int i = 0; i < n; i++) {
            compiledElement[i] = s[get_p(i)];
        }
        compiledSet.insert(compiledElement);
    }
    set_ = compiledSet;
}*/

• Subtask 1: 0 / 20
• Subtask 2: 0 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30