Submission #996159

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
996159	2024-06-10 08:21:02	vjudge1	Xylophone (JOI18_xylophone)	C++17	100 / 100	368 ms	97664 KiB

xylophone

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#include <bits/stdc++.h>
#include "xylophone.h"
using namespace std;
int a[5005],d[5005][5005];
void solve(int n){
  int _=query(1,2);
  for(int i=3; i<=n; i++) d[i-2][i]=query(i-2,i);
  for(int i=2; i<=n; i++) d[i-1][i]=query(i-1,i);
  for(int i=1; i<=n; i++){
    a[1]=i;
    for(int __=-1; __<=1; __+=2){
      vector <int> vis(n+1,0);
      vis[a[1]]++;
      a[2]=a[1]+__*_;
      if(a[2]>=1 and a[2]<=n) vis[a[2]]++;
      int cnt=0;
      for(int j=3; j<=n; j++){
        int v=d[j-2][j];
        int l=d[j-1][j];
        if(v==max(a[j-1],a[j-2])-min(a[j-1],a[j-2])){
          if(a[j-1]>a[j-2]) a[j]=a[j-1]-l;
          else a[j]=a[j-1]+l;
        }else{
          int ifmin=a[j-1]-l;
          int ifmax=a[j-1]+l;
          if(ifmin>0 and max({a[j-2],a[j-1]})-ifmin==v) a[j]=ifmin;
          else a[j]=ifmax;
        }
 
 
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Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:18:8: warning: unused variable 'cnt' [-Wunused-variable]
   18 |    int cnt=0;
      |        ^~~

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53