Submission #758905

#TimeUsernameProblemLanguageResultExecution timeMemory
7589051075508020060209tcGroup Photo (JOI21_ho_t3)C++14
44 / 100
5061 ms308 KiB
#include<bits/stdc++.h> using namespace std; #define int long long int n; int ar[5010]; int dp[5010]; signed main(){ cin>>n; for(int i=1;i<=n;i++){ cin>>ar[i]; } dp[0]=0; for(int i=1;i<=n;i++){ for(int j=0;j<=i-1;j++){ int cal=dp[j]; for(int a=1;a<=n;a++){ if(ar[a]>j&&ar[a]<=i){ for(int b=1;b<a;b++){ if((ar[b]<ar[a]&&ar[b]>j)||(ar[b]>i) ){cal++;} } } } if(j==0){dp[i]=cal;} dp[i]=min(dp[i],cal); } // cout<<dp[i]<<" "; } cout<<dp[n]<<endl; } /* 6 5 1 2 1 100000 1 3 1 1 2 6 1 1000 2 4 1 1 2 5 1 1 */
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