Submission #1030128

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030128		vjudge1	The short shank; Redemption (BOI21_prison)	C++17	0 / 100	2090 ms	70992 KiB

prison

#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3")
#define endl '\n'
#define db double
#define ll __int128
#define int long long
#define pb push_back
#define fs first
#define sd second
#define Mod long(1e9 + 7)
#define all(x) x.begin(), x.end()
#define unvisited long(-1)
#define Eps double(1e-9)
#define _for(i, n) for(int i = 0; i < (n); i++)
#define dbg(x) cout << #x ": " << x << endl;

const int Max = 1e6 + 7, Inf = 1e9 + 7;

void print(bool x) { cout << (x ? "YES" : "NO") << endl; }

string tostring (__int128 x)
{
    string ans = "";
    while(x > 0)
    {
        ans += (x % 10 + '0');
        x /= 10;
    }
    reverse(all(ans));
    return ans;
}

void solve()
{
    int n, d, t; cin >> n >> d >> t; 
    vector <int> v(n), s(n+1); 
    for(auto& u : v) cin >> u;

    int ans = 0, sum = 0;

    for(int i = 0; i < n; i++) {
        int sum = v[i]; 
        for(int j = i+1; j < n; j++){
            sum++;
            if(sum > t) break;
            s[j] = 1;
        }
    }     

    vector <vector<vector<int>>> dp(n+1, vector <vector<int>> 
        (d+1, vector<int> ({ 0, -Inf }))); 

    for(int i = 1; i <= n; i++){
        for(int j = 0; j <= d; j++){
            dp[i][j][0] = max(dp[i-1][j][0], dp[i-1][j][1]);  
            if(v[i-1] > t){ 
                dp[i][j][1] = max(dp[i-1][j][1], ((j-s[i-1])>= 0 ? dp[i-1][j-s[i-1]][0] : -Inf)) + 1;
            }
            //cerr << i << " " << j << " " << dp[i][j][0] << " " << dp[i][j][1] << endl;
            ans = max(ans, max(dp[i][j][0], dp[i][j][1]));
        }
    }

    cout << n-ans << endl; 
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int Q = 1; //cin >> Q;

    while (Q--)
    {
        solve();
    }

    return 0;
}

Compilation message (stderr)

prison.cpp: In function 'void solve()':
prison.cpp:41:18: warning: unused variable 'sum' [-Wunused-variable]
   41 |     int ans = 0, sum = 0;
      |                  ^~~

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