Submission #25738

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
25738	2017-06-24 00:41:35	minimario	Swap (BOI16_swap)	C++14	100 / 100	393 ms	27752 KiB

swap

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#include <bits/stdc++.h>
using namespace std;
 
const int MAX = 200005;
int sz;
 
int ar[MAX];
 
map<pair<int, int>, int >  memo;
int dp(int n, int v) {
  if (memo.find({n, v}) != memo.end()) { 
    return memo[{n, v}];
  }
  
  if (2*n+1 <= sz) {
    if (v < ar[2*n] && v < ar[2*n+1]) { }
    else if (ar[2*n] < v && ar[2*n] < ar[2*n+1]) {
      memo[{n, v}] = dp(2*n, v);
      return memo[{n, v}];
    }
    else if (ar[2*n+1] < ar[2*n] && ar[2*n+1] < v) {
      if (v > ar[2*n]) { 
        if (dp(2*n, ar[2*n]) < dp(2*n+1, ar[2*n])) {
          memo[{n, v}] = dp(2*n+1, v);
        }
        else { 
          memo[{n, v}] = dp(2*n, v);
        }
      }
      else { memo[{n, v}] = min(dp(2*n, v), dp(2*n+1, v)); }
 
 
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Compilation message (stderr)

swap.cpp: In function 'int main(int, const char**)':
swap.cpp:65:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &sz);
                  ^
swap.cpp:68:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &ar[i]);
                      ^

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