Submission #649992

#	Time	Username	Problem	Language	Result	Execution time	Memory
649992		esomer	Unscrambling a Messy Bug (IOI16_messy)	C++17	Compilation error	0 ms	0 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;
        for(int i = lg; i < n; i++){
            if(curr == num) curr = 0; have = 1 - have;
            v[i][k] = have;
        }
        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();
    for(int i = 0, i < n; i++) possible.insert(i);
    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;
        }
    }
    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;
            }
        }
    }
    return ans;
}

/*signed main(){
    /*ios_base::sync_with_stdio(0);
    cin.tie(0);*/
    //freopen("inpt.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    //int tt; cin >> tt;
    /*int tt = 1;
    for(int t = 1; t <= tt; t++){
        //cout << "Case #"<<t << ": ";
        solve();
    }
}*/

Compilation message (stderr)

messy.cpp:155:5: warning: "/*" within comment [-Wcomment]
  155 |     /*ios_base::sync_with_stdio(0);
      |      
messy.cpp: In function 'std::vector<int> restore_permutation(int, int, int)':
messy.cpp:93:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   93 |             if(curr == num) curr = 0; have = 1 - have;
      |             ^~
messy.cpp:93:39: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   93 |             if(curr == num) curr = 0; have = 1 - have;
      |                                       ^~~~
messy.cpp:112:21: error: expected ';' before '<' token
  112 |     for(int i = 0, i < n; i++) possible.insert(i);
      |                     ^~
      |                     ;
messy.cpp:112:22: error: expected primary-expression before '<' token
  112 |     for(int i = 0, i < n; i++) possible.insert(i);
      |                      ^
messy.cpp:112:32: error: 'possible' was not declared in this scope
  112 |     for(int i = 0, i < n; i++) possible.insert(i);
      |                                ^~~~~~~~