Submission #76607

#	Time	Username	Problem	Language	Result	Execution time	Memory
76607		tmwilliamlin168	Swap (BOI16_swap)	C++14	68 / 100	1076 ms	251584 KiB

swap

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

const int mxN=2e5;
int n, a[mxN+1];
vector<int> dp[mxN+1][36], v1, v2;

void mrg(vector<int> &v, vector<int> &a, vector<int> &b) {
	for(int l=1, i=0, j=0; i<a.size()||j<b.size(); i+=l, j+=l, l*=2) {
		for(int k=0; k<l&&i+k<a.size(); ++k)
			v.push_back(a[i+k]);
		for(int k=0; k<l&&j+k<b.size(); ++k)
			v.push_back(b[j+k]);
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n;
	for(int i=1; i<=n; ++i)
		cin >> a[i];
	for(int i=n; i; --i) {
		for(int j=0; i>>j; ++j) {
			for(int k=0; k<1+((i>>j&1)&&i>>j>1); ++k) {
				int b=i>>j^k, c=j*2+k;
				if(2*i+1<=n) {
					if(a[2*i+1]<a[b]&&a[2*i+1]<a[2*i]) {
						v1={a[2*i+1]};
						v2={a[2*i+1]};
						mrg(v1, dp[2*i][0], dp[2*i+1][c+2]);
						mrg(v2, dp[2*i][c+2], dp[2*i+1][1]);
						dp[i][c]=min(v1, v2);
					} else {
						dp[i][c]={min(a[b], a[2*i])};
						mrg(dp[i][c], dp[2*i][a[b]>a[2*i]?c+2:0], dp[2*i+1][0]);
					}
				} else if(2*i<=n)
					dp[i][c]={min(a[b], a[2*i]), max(a[b], a[2*i])};
				else
					dp[i][c]={a[b]};
			}
		}
		if(2*i+1<=n)
			for(int j=0; j<2; ++j)
				for(int k=0; k<36; ++k)
					vector<int>().swap(dp[2*i+j][k]);
	}
	for(int b : dp[1][0])
		cout << b << " ";
}

Compilation message (stderr)

swap.cpp: In function 'void mrg(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
swap.cpp:9:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int l=1, i=0, j=0; i<a.size()||j<b.size(); i+=l, j+=l, l*=2) {
                         ~^~~~~~~~~
swap.cpp:9:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int l=1, i=0, j=0; i<a.size()||j<b.size(); i+=l, j+=l, l*=2) {
                                     ~^~~~~~~~~
swap.cpp:10:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<l&&i+k<a.size(); ++k)
                     ~~~^~~~~~~~~
swap.cpp:12:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<l&&j+k<b.size(); ++k)
                     ~~~^~~~~~~~~

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