This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
const int maxn=1e4;
int v[maxn],dp[maxn][maxn];
int n,m;
int main(){
cin >> n>> m;
for(int i=0; i<n; i++)cin >> v[i+1];
for(int i=0; i<=n; i++)for(int j=0; j<=n; j++) dp[i][j]=-1;
for(int i=0; i<=n; i++) dp[0][i]=0;
for(int i=1; i<=n; i++) for(int j=0; j<=n; j++){
int npega=dp[i-1][j];
if(npega==-1) npega=-1;
else if(npega>=v[i])npega=v[i];
else if(npega+m<v[i])npega=-1;
else npega=v[i];
int pega;
if(j==0)pega=-1;
else{
pega=dp[i-1][j-1];
if(pega==-1) pega=-1;
else if(pega>=v[i]) pega=pega+m;
else pega=pega+m;
}
dp[i][j]=max(pega,npega);
}
for(int i=0; i<=n; i++){
if(dp[n][i]!=-1){
cout << i <<endl;
break;
}
}
return 0;
}
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