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Submission #235393

# Submission time Handle Problem Language Result Execution time Memory
235393 2020-05-28T08:11:08 Z doowey Holding (COCI20_holding) C++14
0 / 110
 10 ms 2688 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = 105;
const int S = N * (N + 1);
const int M = S/2;
const int inf = (int)1e9;

int dp[2][N][S]; // pick i items, indice sum j
int st[N][S];
int ri[N][S];
int a[N];

void upd(int &a, int b){  
  a = min(a, b);
}

int main(){
  fastIO;
  int n, l, r, k;
  cin >> n >> l >> r >> k;
  for(int i = 0 ; i <= n; i ++ ){
    for(int j = 0 ; j < S; j ++ ){
      dp[0][i][j] = dp[1][i][j] = inf;
    }
  }
  dp[0][0][M]=0;
  int ans = 0;
  for(int i = 1; i <= n; i ++ ){
    cin >> a[i];
    if(i >= l && i <= r) ans += a[i];
  }
  for(int i = 1; i <= r; i ++ ){
    for(int j = 0 ; j < i ; j ++ ){
      for(int x = 0; x < S ; x ++ ){
        if(i < l){
          if(dp[0][j][x] == inf) continue;
          upd(dp[1][j + 1][x - i], dp[0][j][x] + a[i]);
          upd(dp[1][j][x], dp[0][j][x]);
        }
        else{
          if(dp[0][j][x] == inf) continue;
          if(j) upd(dp[1][j - 1][x + i], dp[0][j][x]);
          upd(dp[1][j][x], dp[0][j][x] + a[i]);
        }
      }
    }
    for(int j = 0 ; j <= i ; j ++ ){
      for(int x = 0; x < S; x ++ ){
        dp[0][j][x]=dp[1][j][x];
        dp[1][j][x]=inf;
      }
    }
    for(int x = 0; x < S; x ++ ){
      st[i][x]=dp[0][0][x];
    }
  }
  for(int i = 0 ; i <= n; i ++ ){
    for(int j = 0 ; j < S; j ++ ){
      dp[0][i][j] = dp[1][i][j] = inf;
    }
  }
  dp[0][0][M]=0;
  for(int i = n; i >= l ; i -- ){
    for(int j = 0 ; j <= n - i; j ++ ){
      for(int x = 0; x < S; x ++ ){
        if(dp[0][j][x] == inf) continue;
        if(i > r){
          upd(dp[1][j + 1][x + i], dp[0][j][x] + a[i]);
          upd(dp[1][j][x], dp[0][j][x]);
        }
        else{
          if(j) upd(dp[1][j - 1][x - i], dp[0][j][x]);
          upd(dp[1][j][x], dp[0][j][x] + a[i]);
        }
      }
    }
    for(int j = 0 ; j <= n - i ; j ++ ){
      for(int x = 0; x < S; x ++ ){
        dp[0][j][x]=dp[1][j][x];
        dp[1][j][x]=inf;
      }
    }
    for(int x = 0 ;x < S; x ++ ){
      ri[i][x]=dp[0][0][x];
      if(x)
        upd(ri[i][x],ri[i][x-1]);
    }
  }
  for(int x = 0 ; x <= k ; x ++ ){
    upd(ans, st[r][x + M]);
    upd(ans, ri[l][x + M]);
  }
  for(int i = l; i + 1 <= r; i ++ ){
    for(int x = 0; x <= k ; x ++ ){
      upd(ans, st[i][x + M] + ri[i + 1][k - x + M]);
    }
  }
  cout << ans << "\n";
  return 0;
}

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1152 KB Output is correct
2 Correct 9 ms 2304 KB Output is correct
3 Correct 10 ms 2688 KB Output is correct
4 Correct 10 ms 2688 KB Output is correct
5 Correct 10 ms 2688 KB Output is correct
6 Correct 10 ms 2688 KB Output is correct
7 Incorrect 8 ms 2304 KB Output isn't correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1152 KB Output is correct
2 Correct 9 ms 2304 KB Output is correct
3 Correct 10 ms 2688 KB Output is correct
4 Correct 10 ms 2688 KB Output is correct
5 Correct 10 ms 2688 KB Output is correct
6 Correct 10 ms 2688 KB Output is correct
7 Incorrect 8 ms 2304 KB Output isn't correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1152 KB Output is correct
2 Correct 9 ms 2304 KB Output is correct
3 Correct 10 ms 2688 KB Output is correct
4 Correct 10 ms 2688 KB Output is correct
5 Correct 10 ms 2688 KB Output is correct
6 Correct 10 ms 2688 KB Output is correct
7 Incorrect 8 ms 2304 KB Output isn't correct

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1152 KB Output is correct
2 Correct 9 ms 2304 KB Output is correct
3 Correct 10 ms 2688 KB Output is correct
4 Correct 10 ms 2688 KB Output is correct
5 Correct 10 ms 2688 KB Output is correct
6 Correct 10 ms 2688 KB Output is correct
7 Incorrect 8 ms 2304 KB Output isn't correct