Submission #989106

#	Time	Username	Problem	Language	Result	Execution time	Memory
989106		steveonalex	Mechanical Doll (IOI18_doll)	C++17	53 / 100	93 ms	17468 KiB

doll

#include <bits/stdc++.h>
#include "doll.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());
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());
    }

void create_circuit(int m, vector<int> a);
namespace Grader{
    vector<int> a;
    void answer(vector<int> C, vector<int> X, vector<int> Y){
        cout << "C: ";
        printArr(C);
        cout << "X: ";
        printArr(X); 
        cout << "Y: ";
        printArr(Y);

        cout << "Validating...\n";
        int ball = 0;
        vector<int> ans;
        vector<bool> state(X.size());
        while(ball != 0 || ans.empty()){
            cout << "Ball: " << ball << endl;
            if (ball > 0) ans.push_back(ball);
            if (ball >= 0){
                ball = C[ball];
            }
            else {
                int cur = (-ball) - 1;
                if (state[cur]){
                    state[cur] = false;
                    ball = Y[cur];
                }
                else{
                    state[cur] = true;
                    ball = X[cur];
                }
            }
        }

        if (ans != a) cout << "Wrong answer! (incorrect sequence produced)\n";
        else if (*max_element(ALL(state)) == 1) cout << "Wrong answer! (there exists an Y switch)\n";
        else cout << "Correct answer!\n";
    }

    void solve(){
        int n, m; cin >> n >> m;
        a = vector<int>(n);
        for(int i = 0; i<n; ++i) cin >> a[i];

        create_circuit(m, a);
    }

}

// using namespace Grader;

void toss(vector<int> &a){
    int n = a.size();
    vector<int> st(n*2);

    for(int i: a){
        int idx = 1;
        while(idx < n){
            if (!st[idx]){
                st[idx] = 1;
                idx = idx * 2;
            }
            else{
                st[idx] = 0;
                idx = idx * 2 + 1;
            }
        }
        st[idx] = i;
    }

    for(int i = n; i<n*2; ++i) a[i-n] = st[i];
}

void create_circuit(int m, vector<int> a) {
    vector<int> C(m+1, 0);
    vector<int> X, Y;

    int n = a.size();
    a.push_back(-1);
    vector<vector<int>> fw(m+1);
    for(int i = 0; i<n; ++i){
        fw[a[i]].push_back(a[i+1]);
    }
    fw[0].push_back(a[0]);
    X.push_back(0); Y.push_back(0);


    int cur = -1;
    int last = -1;
    for(int i = 0; i<=m; ++i) {
        int k = fw[i].size();
        if (k == 0) continue;
        if (k == 1) {C[i] = fw[i][0]; continue;}
        if (k != LASTBIT(k)){
            while(fw[i].size() != LASTBIT(fw[i].size())) fw[i].push_back(cur-1);
            fw[i].back() = last;
            last = cur-1;
            k = fw[i].size();
        }

        C[i] = cur-1;

        toss(fw[i]);

        vector<int> mariana(k);
        for(int i = 1; i<k; ++i) mariana[i] = --cur;

        for(int j: fw[i]) mariana.push_back(j);
        for(int i = 1; i<k; ++i){
            X.push_back(mariana[i * 2]);
            Y.push_back(mariana[i * 2 + 1]);
        }
    }

    X[0] = last;
    answer(C, X, Y);
}


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

Compilation message (stderr)

doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:142:32: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare]
  142 |             while(fw[i].size() != LASTBIT(fw[i].size())) fw[i].push_back(cur-1);
      |                   ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9.0000000018 / 18
• Subtask 6: 28.0000000056 / 56