Submission #96201

#	Time	Username	Problem	Language	Result	Execution time	Memory
96201		lyc	Mechanical Doll (IOI18_doll)	C++14	53 / 100	251 ms	112960 KiB

doll

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

const int MAXM = 100005;
deque<int> nxt[MAXM];
int S = -1;
vector<int> C, X, Y;

int bindec(string bin) {
    reverse(bin.begin(), bin.end());
    int dec = 0;
    for (auto c : bin) {
        dec *= 2;
        dec += c-'0';
    }
    //cout << bin << "-> " << dec << endl;
    return dec;
}

void build(int rt, int i, int s, int e, string rec) {
    if (s > e) return;
    
    //cout << "BUILD " << rt << ' ' << i << ' ' << s << ' ' << e << " : " << rec << endl;
    if (s == e) {
        if (i == rt) {
            C[i] = nxt[rt][bindec(rec)];
        }
        else {
            X[-i] = i;
            Y[-i] = nxt[rt][bindec(rec)];
            //X.push_back(rt);
            //Y.push_back(nxt[rt][bindec(rec)]);
        }
    }
    else if (s+1 == e && i != rt) {
        X[-i] = nxt[rt][bindec(rec+'0')];
        Y[-i] = nxt[rt][bindec(rec+'1')];
        //X.push_back(nxt[rt][bindec(rec+'0')]);
        //Y.push_back(nxt[rt][bindec(rec+'1')]);
    }
    else {
        int m = (s+e)/2;
        if (i >= 0) {
            C[i] = S--;
            build(rt, C[i], s, e, rec);
        }
        else {
            int l = S;
            build(rt, S--, s, m, rec+'0');
            int r = S;
            build(rt, S--, m+1, e, rec+'1');
            //X.push_back(l);
            //Y.push_back(r);
            X[-i] = l;
            Y[-i] = r;
            //cout << "BRANCH " << i << " " << X[-i] << " " << Y[-i] << endl;
        }
    }
}

void create_circuit(int M, std::vector<int> A) {
    int N = A.size();
    C.resize(M+1);

    A.push_back(0);
    for (int i = 0; i <= N; ++i) {
        nxt[A[i]].push_back(A[(i+1)%(N+1)]);
    }

    X.resize(2*N);
    Y.resize(2*N);
    for (int i = 0; i <= M; ++i) {
        while (true) {
            int sz = (int)nxt[i].size();
            if (sz - (sz&-sz) > 0) nxt[i].push_front(S);
            else break;
        }
        build(i, i, 0, (int)nxt[i].size()-1, "");
        //cout << i << ": "; for (auto x : nxt[i]) cout << x << ' '; cout << endl;
    }

    vector<int> XX, YY;
    for (int i = 1; i < -S; ++i) {
        XX.push_back(X[i]);
        YY.push_back(Y[i]);
    }
    //cout << endl;
    //for (auto x : C) cout << x << ' '; cout << endl;
    //for (auto x : XX) cout << x << ' '; cout << endl;
    //for (auto x : YY) cout << x << ' '; cout << endl;
    answer(C, XX, YY);
}

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 9.0000000036 / 18
• Subtask 6: 28.0000000112 / 56