Submission #321212

#	Time	Username	Problem	Language	Result	Execution time	Memory
321212		fadi57	Safety (NOI18_safety)	C++14	13 / 100	2072 ms	6124 KiB

safety

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mx=600;
const int mod= 998244353;
const ll inf=2*1e16+9;
ll n,h;
ll a[mx];ll c[mx];
ll dp[mx][mx];
int main() {
cin>>n>>h;
ll sum=0;ll mxx=500;
for(int i=0;i<n;i++){
    cin>>a[i];
    mxx=max(mxx,a[i]);
    
}
if(h>mxx){cout<<0;return 0;}
memset(dp,inf,sizeof(dp));
for(int i=0;i<=mxx;i++){
    dp[0][i]=abs(a[0]-i);
}
for(int i=1;i<n;i++){
    for(int j=0;j<=mxx;j++){
        for(int jj=j;jj<=j+h;jj++){
            dp[i][j]=min(dp[i][j],dp[i-1][jj]+abs(a[i]-j));
        }
         for(int jj=j-1;jj>=(j-h)&&jj>=0;jj--){
           dp[i][j]=min(dp[i][j],dp[i-1][jj]+abs(a[i]-j));
        }
        
    }
}
ll ans=inf;
for(int i=0;i<=mxx;i++){ans=min(ans,dp[n-1][i]);}cout<<ans;
}

Compilation message (stderr)

safety.cpp: In function 'int main()':
safety.cpp:19:11: warning: overflow in conversion from 'll' {aka 'long long int'} to 'int' changes value from '20000000000000008' to '-545128440' [-Woverflow]
   19 | memset(dp,inf,sizeof(dp));
      |           ^~~
safety.cpp:12:4: warning: unused variable 'sum' [-Wunused-variable]
   12 | ll sum=0;ll mxx=500;
      |    ^~~

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 6 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29