58 lines
968 B
C++
58 lines
968 B
C++
#include<bits/stdc++.h>
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using namespace std;
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using ll = long long;
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void solve()
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{
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int n,d;
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cin>>n>>d;
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vector<int>v;
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for(int i=0; i<n; ++i)
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{
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int x;
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cin>>x;
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v.push_back(x);
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}
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int ct=0;
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for(int i=1; i<n; ++i)
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{
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if(v[i]<=v[i-1])
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{
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int x=v[i-1]-v[i];
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if(x==0)
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{
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v[i]+=d;
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ct++;
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}
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else if(x%d==0)
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{
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int y=x/d;
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ct+=y;
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v[i]+=y*d;
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}
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else
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{
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int y=(x/d)+1;
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ct+=y;
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v[i]+=y*d;
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}
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}
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if(v[i]==v[i-1])
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{
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v[i]+=d;
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ct++;
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}
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}
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cout<<ct<<endl;
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}
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int main()
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{
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ios_base::sync_with_stdio(false);
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cin.tie(nullptr);
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int TC = 1;
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//cin >> TC;
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//cin.ignore();
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while (TC--) solve();
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} |