제출 #93426

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
93426		popovicirobert	Swap (BOI16_swap)	C++14	0 / 100	2 ms	380 KiB

swap

#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
#define ld long double
// 217
// 44

using namespace std;

const int INF = 1e9;
const int MAXN = (int) 1e5;

int arr[3 * MAXN + 1];

inline void check(int val1, int val2, int pos1, int pos2, vector <int> &sol) {
    bool ok1 = 0, ok2 = 0;
    while(1) {
        int p1, p2;
        if(arr[2 * pos1] < arr[2 * pos1 + 1]) {
            p1 = 2 * pos1;
        }
        else {
            p1 = 2 * pos1 + 1;
        }
        if(arr[2 * pos2] < arr[2 * pos2 + 1]) {
            p2 = 2 * pos2;
        }
        else {
            p2 = 2 * pos2 + 1;
        }
        if(arr[p1] > val1 && arr[p2] > val2) {
            if(ok1 == 0 && ok2 == 0) {
                if(pos1 < pos2) {
                    sol.push_back(val1);
                    sol.push_back(val2);
                }
                else {
                    sol.push_back(val2);
                    sol.push_back(val1);
                }
            }
            else if(ok1) {
                sol.push_back(val2);
            }
            else if(ok2) {
                sol.push_back(val1);
            }
            ok1 = ok2 = 1;
            break;
        }
        if(arr[p1] > val1 && arr[p2] < val2) {
            if(ok1 == 1) {
                sol.push_back(arr[p2]);
                pos2 = p2;
            }
            else {
                if(pos1 < pos2) {
                    sol.push_back(val1);
                    ok1 = 1;
                }
                else {
                    sol.push_back(arr[p2]);
                    pos2 = p2;
                }
            }
        }
        else if(arr[p1] < val1 && arr[p2] > val2) {
            if(ok2 == 1) {
                sol.push_back(arr[p1]);
                pos1 = p1;
            }
            else {
                if(pos2 < pos1) {
                    sol.push_back(val2);
                    ok2 = 1;
                }
                else {
                    sol.push_back(arr[p1]);
                    pos1 = p1;
                }
            }
        }
        else if(arr[p1] < val1 && arr[p2] < val2) {
            if(pos1 < pos2) {
                sol.push_back(arr[p1]);
                pos1 = p1;
            }
            else {
                sol.push_back(arr[p2]);
                pos2 = p2;
            }
        }
    }
}

int main() {
    //ifstream cin("A.in");
    //ofstream cout("A.out");
    int i, n;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n;
    for(i = 1; i <= n; i++) {
        cin >> arr[i];
    }
    for(i = n + 1; i <= 2 * n + 5; i++) {
        arr[i] = INF;
    }
    for(i = 2; i <= n; i += 2) {
        int pos = i / 2;
        int a = min(arr[pos], min(arr[i], arr[i + 1]));
        int c = max(arr[pos], max(arr[i], arr[i + 1]));
        int b = arr[pos] + arr[i] + arr[i + 1] - a - c;
        if(arr[pos] == a) {

        }
        else if(arr[pos] == b) {
            if(arr[i] == a) {
                swap(arr[pos], arr[i]);
            }
            else {
                //cerr << min(arr[2 * i], arr[2 * i + 1]) << " " << b << " " << min(arr[2 * i + 2], arr[2 * i + 3]) << "\n";
                vector <int> sol1, sol2;
                check(b, c, i, i + 1, sol1);
                check(c, b, i, i + 1, sol2);
                //b c a
                if(sol1 < sol2) {
                    swap(arr[pos], arr[i]);
                    swap(arr[pos], arr[i + 1]);
                }
                else {
                    swap(arr[pos], arr[i + 1]);
                }
            }
        }
        else if(arr[pos] == c) {
            if(arr[i] == a) {
                swap(arr[pos], arr[i]);
            }
            else {
                vector <int> sol1, sol2;
                check(b, c, i, i + 1, sol1);
                check(c, b, i, i + 1, sol2);
                //c b a
                if(sol1 < sol2) {
                    swap(arr[pos], arr[i + 1]);
                }
                else {
                    swap(arr[pos], arr[i]);
                    swap(arr[pos], arr[i + 1]);
                }
            }
        }
        /*for(int j = 1; j <= n; j++) {
            cerr << arr[j] << " ";
        }
        cerr << "\n";*/
    }
    for(i = 1; i <= n; i++) {
        cout << arr[i] << " ";
    }
    //cin.close();
    //cout.close();
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 11
• Subtask 3: 0 / 27
• Subtask 4: 0 / 20
• Subtask 5: 0 / 32