Submission #228015

#	Time	Username	Problem	Language	Result	Execution time	Memory
228015		farmerboy	Swap (BOI16_swap)	C++14	0 / 100	5 ms	1920 KiB

swap

/*
    Author: Nguyen Tan Bao
    Status:
    Idea:
*/
 
#include <bits/stdc++.h>
#define FI first
#define SE second
#define EPS 1e-9
#define ALL(a) a.begin(),a.end()
#define SZ(a) int((a).size())
#define MS(s, n) memset(s, n, sizeof(s))
#define FOR(i,a,b) for (int i = (a); i <= (b); i++)
#define FORE(i,a,b) for (int i = (a); i >= (b); i--)
#define FORALL(it, a) for (__typeof((a).begin()) it = (a).begin(); it != (a).end(); it++)
//__builtin_ffs(x) return 1 + index of least significant 1-bit of x
//__builtin_clz(x) return number of leading zeros of x
//__builtin_ctz(x) return number of trailing zeros of x
 
using namespace std;
using ll = long long;
using ld = double;
typedef pair<int, int> II;
typedef pair<II, int> III;
typedef complex<ld> cd;
typedef vector<cd> vcd;
 
const ll MODBASE = 1000000007LL;
const int MAXN = 400010;
const int MAXM = 1000;
const int MAXK = 16;
const int MAXQ = 200010;

int x[MAXN], n;

int getMin(int u) {
    return min(x[u], min(x[u*2], x[u*2+1]));
}

II check(int u, int v) {
    return II(getMin(u), getMin(v));
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(nullptr);
    FOR(i,1,400001) x[i] = 1000000000;
    cin >> n;
    FOR(i,1,n) cin >> x[i];
    FOR(i,1,n) {
        int a = x[i], b = x[2*i], c = x[2*i+1];
        int Min = min(a, min(b, c));
        if (a == Min) continue;
        if (b == Min) {
            swap(x[i], x[2*i]);
            continue;
        }
        // c == Min
        swap(x[i], x[2*i+1]);
        II u = check(2*i, 2*i+1);
        swap(x[2*i], x[2*i+1]);
        II v = check(2*i, 2*i+1);
        if (u < v) swap(x[2*i], x[2*i+1]);
    }

    FOR(i,1,n) cout << x[i] << ' ';
    return 0;
}

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