Submission #878751

#	Time	Username	Problem	Language	Result	Execution time	Memory
878751		Mr_Ph	The short shank; Redemption (BOI21_prison)	C++17	0 / 100	30 ms	251000 KiB

prison

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
typedef long long ll;
using namespace std;
using namespace __gnu_pbds;
template<class x>
using ordered_set = tree<x, null_type,less<x>, rb_tree_tag,tree_order_statistics_node_update>;
ll mod=(ll)1e9+7;
ll mod1=998244353;
///the defines :)
#define endl '\n'
#define vi vector<int>
#define ent(arr) for(int i=0;i<arr.size();i++)cin>>arr[i];
#define all(arr) arr.begin(),arr.end()
#define allr(arr) arr.rbegin(),arr.rend()
#define sz size()
#define int long long
int n,d,a;
vi arr;
int dp[4002][2][4002];
int ans(int idx,bool prv,int curd)
{
    if(idx==n)return 0;
    if(dp[idx][prv][curd]!=-1)
        return dp[idx][prv][curd];
    int e=1e18;
    if(arr[idx]<=a||prv==1)
    {
        if((curd-1)>=0)
        e=min(e,ans(idx+1,0,curd-1)+1);
        e=min(e,ans(idx+1,(idx<n-1?arr[idx]>=arr[idx+1]:0),curd)+1);
    }
    else
        e=ans(idx+1,0,curd);
    return dp[idx][prv][curd]=e;
}
void preprocess() {}
void solve()
{
    cin>>n>>d>>a;
    arr.resize(n);
    ent(arr);
    memset(dp,-1,sizeof dp);
    cout<<ans(0,0,d)<<endl;
}
signed main()
{
    // freopen("meta_game_input.txt","r",stdin);
    // freopen("otput.txt","w",stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    preprocess();
    //bla();
    int t=1;
    //cin>>t;
    while(t--)
        solve();
}

Compilation message (stderr)

prison.cpp: In function 'void solve()':
prison.cpp:14:31: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 | #define ent(arr) for(int i=0;i<arr.size();i++)cin>>arr[i];
      |                              ~^~~~~~~~~~~
prison.cpp:43:5: note: in expansion of macro 'ent'
   43 |     ent(arr);
      |     ^~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20