Submission #949648

#	Time	Username	Problem	Language	Result	Execution time	Memory
949648		steveonalex	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	2 ms	856 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
// mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng(69);
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

// const int INF = 2e9 + 69;

// namespace Interactor{
//     int n;
//     vector<int> perm;
//     vector<string> S;

//     int w_cnt, r_cnt;

//     void add_element(string s){
//         cout << "Add: " << s << "\n";
//         S.push_back(s);
//         w_cnt++;
//     }

//     void compile_set(){
//         for(string &s: S){
//             string t(n, '0');
//             for(int i= 0; i<n; ++i) t[i] = s[perm[i]];
//             s = t;
//         }
//         sort(ALL(S));
//     }

//     bool check_element(string s){
//         cout << "Query: " << s << "\n";
//         r_cnt++;
//         return binary_search(ALL(S), s);
//     }

    void send_nude(int n){
        add_element("01" + string(n-2, '1'));
        add_element("00" + string(n-2, '1'));
        add_element("1" + string(n-1, '0'));
        for(int i = 0; MASK(i) < n; ++i){
            string cur = string(n, '0');
            cur[MASK(i)] = '1';
            add_element(cur);
        }
        for(int i = 1; MASK(i) < n; ++i){
            string cur = string(n, '0'); cur[0] = '1';
            for(int j = 0; j <= i; ++j) cur[MASK(j)] = '1';
            add_element(cur);
        }
        for(int i = 1; i<n; ++i) if (i != LASTBIT(i)){
            string cur(n, '0'); cur[i] = '1';
            for(int j = 0; MASK(j) < n; ++j) if (GETBIT(i, j)) {
                cur[MASK(j)] = '1';
                add_element(cur);
                cur[MASK(j)] = '0';
            }
        }
    }

    vector<int> find_happiness(int n){
        vector<int> ans(n, -1), perm(n);
        for(int i = 0; i<n; ++i) perm[i] = i;
        shuffle(ALL(perm), rng);

        vector<int> PowerOfTwo;
        for(int i: perm) {
            string cur(n, '0');
            cur[i] = '1';
            if (check_element(cur)){
                PowerOfTwo.push_back(i);
            }
            if (MASK(PowerOfTwo.size()) > n) break;
        }
        int zeroPos = -1;
        for(int j = 0; j< PowerOfTwo.size(); ++j){
            int i = PowerOfTwo[j];
            string cur(n, '1');
            cur[i] = '0';
            if (check_element(cur)) {
                zeroPos = i;
                PowerOfTwo.erase(PowerOfTwo.begin() + j);
                break;
            }
        }

        vector<int> PowerTower;
        for(int j = 0; j < PowerOfTwo.size(); ++j){
            int i = PowerOfTwo[j];
            string cur(n, '1');
            cur[i] = cur[zeroPos] = '0';
            if (check_element(cur)) {
                PowerTower.push_back(i);
                PowerOfTwo.erase(PowerOfTwo.begin() + j);
                break;
            }
        }

        while(PowerOfTwo.size()){
            for(int j = 0; j < PowerOfTwo.size(); ++j){
                int i = PowerOfTwo[j];
                string cur(n, '0');
                cur[zeroPos] = cur[i] = '1';
                for(int i: PowerTower) cur[i] = '1';
                if (check_element(cur)) {
                    PowerTower.push_back(i);
                    PowerOfTwo.erase(PowerOfTwo.begin() + j);
                    break;
                }
            }
        }

        ans[zeroPos] = 0;
        for(int i= 0; i<PowerTower.size(); ++i) ans[PowerTower[i]] = MASK(i);
        vector<int> signature(n);
        int m = PowerTower.size();
        for(int i = 0; i<PowerTower.size(); ++i){
            vector<pair<int, int>> cnt(MASK(i), {0, 0});
            for(int j = 0; j<n; ++j) if (j != 0 && LASTBIT(j) != j){
                int k = j & (MASK(i) - 1);
                if (GETBIT(j, i)) cnt[k].second++;
                else cnt[k].first++;
            }
            for(int j: perm) if (ans[j] == -1){
                if (cnt[signature[j]].second == 0){
                    cnt[signature[j]].first--;
                    continue;
                }
                if (cnt[signature[j]].first == 0){
                    cnt[signature[j]].second--;
                    signature[j] += MASK(i);
                    continue;
                }

                string cur(n, '0');
                cur[PowerTower[i]] = cur[j] = '1';
                if (check_element(cur)){
                    cnt[signature[j]].second--;
                    signature[j] += MASK(i);
                }
                else cnt[signature[j]].first--;
            }
        }

        for(int i = 0; i<n; ++i) if (ans[i] == -1) ans[i] = signature[i];

        return ans;
    }

    vector<int> restore_permutation(int n, int w, int r) {
        send_nude(n);
        compile_set();

        return find_happiness(n);
    }

    // bool solve(int _n, vector<int> _perm){
    //     n = _n; perm = _perm;
    //     w_cnt = r_cnt = 0;
    //     return restore_permutation(n, 1000, 1000) == perm;
    // }

//     void resource_hog(){
//         cout << "Write cnt: " << w_cnt << "\n";
//         cout << "Read cnt: " << r_cnt << "\n";
//     }

// }




// int main(void){
//     ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

//     int n = 128;
//     vector<int> perm(n);
//     for(int i = 0; i<n; ++i) perm[i] = i;
//     shuffle(ALL(perm), rng);

//     bool verdict = Interactor::solve(n, perm);
//     if (verdict) cout << "AC\n";
//     else cout << "WA\n";

//     Interactor::resource_hog();

//     return 0;
// }

Compilation message (stderr)

messy.cpp: In function 'void send_nude(int)':
messy.cpp:83:32: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
   83 |         for(int i = 0; MASK(i) < n; ++i){
      |                                ^
messy.cpp:88:32: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
   88 |         for(int i = 1; MASK(i) < n; ++i){
      |                                ^
messy.cpp:95:36: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
   95 |             for(int j = 0; MASK(j) < n; ++j) if (GETBIT(i, j)) {
      |                                    ^
messy.cpp: In function 'std::vector<int> find_happiness(int)':
messy.cpp:115:41: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
  115 |             if (MASK(PowerOfTwo.size()) > n) break;
      |                                         ^
messy.cpp:118:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |         for(int j = 0; j< PowerOfTwo.size(); ++j){
      |                        ~^~~~~~~~~~~~~~~~~~~
messy.cpp:130:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |         for(int j = 0; j < PowerOfTwo.size(); ++j){
      |                        ~~^~~~~~~~~~~~~~~~~~~
messy.cpp:142:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |             for(int j = 0; j < PowerOfTwo.size(); ++j){
      |                            ~~^~~~~~~~~~~~~~~~~~~
messy.cpp:156:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  156 |         for(int i= 0; i<PowerTower.size(); ++i) ans[PowerTower[i]] = MASK(i);
      |                       ~^~~~~~~~~~~~~~~~~~
messy.cpp:159:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  159 |         for(int i = 0; i<PowerTower.size(); ++i){
      |                        ~^~~~~~~~~~~~~~~~~~
messy.cpp:158:13: warning: unused variable 'm' [-Wunused-variable]
  158 |         int m = PowerTower.size();
      |             ^

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