oj.uz

Submission #1077884

# Submission time Handle Problem Language Result Execution time Memory
1077884 2024-08-27T10:05:34 Z ntdaccode K blocks (IZhO14_blocks) C++17
0 / 100
 48 ms 86560 KB 
#include<bits/stdc++.h>
#define fori(i,a,b) for(int i=a;i<=b;i++)
#define int long long
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back
using namespace std;
const int mod=1e9+7;
const int M=1e6+10;
const int N=1e3+10;
int n,k,f[100010][110],a[100010];
int32_t main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  #define task "1"
  if(fopen(task".inp","r"))
  {
    freopen(task".inp","r",stdin);
    freopen(task".out","w",stdout);
  }
  cin >> n >> k;
  fori(i,1,n) cin >> a[i];
  memset(f,61,sizeof(f));
  f[0][1]=0;
  fori(i,1,n) f[i][1]=max(f[i-1][1],a[i]);
  f[0][1]=1e16;
  fori(j,2,k)
  {
    stack<int> sk;
    fori(i,1,n)
    {
      f[i][j]=f[i-1][j-1]+a[i];//cout << f[i][j] << " ";
      while(!sk.empty()&&a[sk.top()]<=a[i])
      {
        f[i][j]=min(f[i][j],f[sk.top()+1][j-1]+a[i]);
        f[i][j]=min(f[i][j],f[sk.top()][j]+a[i]-a[sk.top()]);
        sk.pop();
      }
      if(sk.size())
      {
        f[i][j]=min(f[i][j],f[sk.top()+1][j-1]+a[i]);
        f[i][j]=min(f[i][j],f[sk.top()][j]);
      }
      sk.push(i);

    }
  }
  cout << f[n][k];
}

Compilation message

blocks.cpp: In function 'int32_t main()':
blocks.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen(task".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen(task".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 86352 KB Output is correct
2 Correct 45 ms 86352 KB Output is correct
3 Correct 42 ms 86536 KB Output is correct
4 Correct 43 ms 86436 KB Output is correct
5 Correct 43 ms 86356 KB Output is correct
6 Correct 42 ms 86516 KB Output is correct
7 Correct 42 ms 86416 KB Output is correct
8 Correct 47 ms 86356 KB Output is correct
9 Correct 48 ms 86404 KB Output is correct
10 Incorrect 42 ms 86352 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 86356 KB Output is correct
2 Correct 40 ms 86356 KB Output is correct
3 Correct 42 ms 86356 KB Output is correct
4 Correct 42 ms 86364 KB Output is correct
5 Correct 46 ms 86340 KB Output is correct
6 Correct 43 ms 86368 KB Output is correct
7 Correct 41 ms 86352 KB Output is correct
8 Correct 43 ms 86472 KB Output is correct
9 Correct 41 ms 86560 KB Output is correct
10 Incorrect 40 ms 86352 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 86352 KB Output is correct
2 Correct 45 ms 86352 KB Output is correct
3 Correct 42 ms 86536 KB Output is correct
4 Correct 43 ms 86436 KB Output is correct
5 Correct 43 ms 86356 KB Output is correct
6 Correct 42 ms 86516 KB Output is correct
7 Correct 42 ms 86416 KB Output is correct
8 Correct 47 ms 86356 KB Output is correct
9 Correct 48 ms 86404 KB Output is correct
10 Incorrect 42 ms 86352 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 86352 KB Output is correct
2 Correct 45 ms 86352 KB Output is correct
3 Correct 42 ms 86536 KB Output is correct
4 Correct 43 ms 86436 KB Output is correct
5 Correct 43 ms 86356 KB Output is correct
6 Correct 42 ms 86516 KB Output is correct
7 Correct 42 ms 86416 KB Output is correct
8 Correct 47 ms 86356 KB Output is correct
9 Correct 48 ms 86404 KB Output is correct
10 Incorrect 42 ms 86352 KB Output isn't correct
11 Halted 0 ms 0 KB -