Submission #407040

#	Time	Username	Problem	Language	Result	Execution time	Memory
407040		mat_v	The short shank; Redemption (BOI21_prison)	C++14	15 / 100	33 ms	1740 KiB

prison

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
#define mod 998244353
#define xx first
#define yy second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define ll long long
#define pii pair<int,int>


using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;/// find_by_order(x)(x+1th) , order_of_key() (strictly less)
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());


int n,d,t;
int niz[100005];

int dp[505][505];

int main()
{

    ios_base::sync_with_stdio(false); cin.tie(0);

    cin >> n >> d >> t;
    ff(i,1,n){
        cin >> niz[i];
    }
    d = min(n,d);

    fb(i,n,1){
        ff(j,0,d){
            if(j == 0){
                int mn = niz[i]-1;
                ff(k,i,n){
                    mn++;
                    mn = min(mn, niz[k]);
                    if(mn <= t)dp[i][j]++;
                }
                continue;
            }
            int mn = niz[i] - 1;
            int tr = 0;
            dp[i][j] = 1e9;
            ff(k,i,n){
                mn++;
                mn = min(mn, niz[k]);
                if(mn <= t)tr++;
                dp[i][j] = min(dp[i][j], dp[k + 1][j - 1] + tr);
            }
        }
    }
    cout << dp[1][d] << "\n";
    return 0;
}

Compilation message (stderr)

prison.cpp: In function 'int main()':
prison.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
prison.cpp:34:5: note: in expansion of macro 'ff'
   34 |     ff(i,1,n){
      |     ^~
prison.cpp:7:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    7 | #define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
      |                           ^
prison.cpp:39:5: note: in expansion of macro 'fb'
   39 |     fb(i,n,1){
      |     ^~
prison.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
prison.cpp:40:9: note: in expansion of macro 'ff'
   40 |         ff(j,0,d){
      |         ^~
prison.cpp:6:27: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
prison.cpp:43:17: note: in expansion of macro 'ff'
   43 |                 ff(k,i,n){
      |                 ^~
prison.cpp:6:27: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
prison.cpp:53:13: note: in expansion of macro 'ff'
   53 |             ff(k,i,n){
      |             ^~

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