Submission #76611

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
76611	2018-09-15 07:30:49	tmwilliamlin168	Swap (BOI16_swap)	C++14	100 / 100	936 ms	232748 KiB

swap

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#include <bits/stdc++.h>
using namespace std;
const int mxN=2e5;
int n, a[mxN+1];
vector<int> dp[mxN+1][36], v1, v2;
bool v[mxN+1][36];
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];
  v[1][0]=1;
  for(int i=1; 2*i+1<=n; ++i) {
    for(int j=0; j<36; ++j) {
      if(!v[i][j])
        continue;
      int b=i>>j/2^j&1;
 
 
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Compilation message (stderr)

swap.cpp: In function 'void mrg(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
swap.cpp:10:26: 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:10:38: 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:11:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<l&&i+k<a.size(); ++k)
                     ~~~^~~~~~~~~
swap.cpp:13:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<l&&j+k<b.size(); ++k)
                     ~~~^~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:30:18: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    int b=i>>j/2^j&1;
                 ~^~
swap.cpp:43:18: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    int b=i>>j/2^j&1;
                 ~^~

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