oj.uz

Submission #37912

# Submission time Handle Problem Language Result Execution time Memory
37912 2017-12-29T02:43:30 Z mirbek01 K blocks (IZhO14_blocks) C++14
53 / 100
 1000 ms 82880 KB 
# include <bits/stdc++.h>

# define pb push_back
# define fr first
# define sc second
# define mk make_pair

using namespace std;

const int inf = 1e9 + 7;
const int N = 1e5 + 5;

typedef long long ll;

int n, a[N], k, t[N * 4];
ll dp[101][N];

void build(int v = 1, int tl = 1, int tr = n)
{
      if(tl == tr)
            t[v] = a[tl];
      else
      {
            int tm = (tl + tr) >> 1;
            build(v << 1, tl, tm);
            build((v << 1) | 1, tm + 1, tr);
            t[v] = max(t[v << 1], t[(v << 1) | 1]);
      }
}

int get(int l, int r, int v = 1, int tl = 1, int tr = n)
{
      if(l > tr || tl > r) return 0;
      if(l <= tl && tr <= r) return t[v];
      int tm = (tl + tr) >> 1;
      return max(get(l, r, v << 1, tl, tm),
                        get(l, r, (v << 1) | 1, tm + 1, tr));
}

void dv(int k, int l, int r, int opl, int opr)
{
      if(l > r) return ;

      int md = (l + r) >> 1, opt;

      dp[k][md] = 1e18;

      for(int i = opl; i <= min(md, opr); i ++)
      {
            ll now = dp[k - 1][i - 1] + get(i, md);
            if(now <= dp[k][md])
            {
                  dp[k][md] = now;
                  opt = i;
            }
      }

      dv(k, l, md - 1, opl, opt);
      dv(k, md + 1, r, opt, opr);
}

int main()
{
      cin >> n >> k;

      for(int i = 1; i <= n; i ++)
            scanf("%d", &a[i]);

      int mx = 0;
      build();

      memset(dp, 127, sizeof(dp));
      for(int i = 1; i <= n; i ++)
      {
            mx = max(mx, a[i]);
            dp[1][i] = mx;
      }


      for(int i = 2; i <= k; i ++)
      {
            for(int j = i; j <= n; j ++)
            {
                  for(int f = j; f <= n; f ++)
                  {
                        dp[i][f] = min(dp[i][f], dp[i - 1][j - 1] + get(j, f));
                  }
            }
      }

      cout << dp[k][n] << endl;
}

Compilation message

blocks.cpp: In function 'int main()':
blocks.cpp:67:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a[i]);
                               ^
blocks.cpp: In function 'void dv(int, int, int, int, int)':
blocks.cpp:58:33: warning: 'opt' may be used uninitialized in this function [-Wmaybe-uninitialized]
       dv(k, l, md - 1, opl, opt);
                                 ^

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 82880 KB Output is correct
2 Correct 3 ms 82880 KB Output is correct
3 Correct 6 ms 82880 KB Output is correct
4 Correct 3 ms 82880 KB Output is correct
5 Correct 13 ms 82880 KB Output is correct
6 Correct 9 ms 82880 KB Output is correct
7 Correct 13 ms 82880 KB Output is correct
8 Correct 3 ms 82880 KB Output is correct
9 Correct 6 ms 82880 KB Output is correct
10 Correct 3 ms 82880 KB Output is correct
11 Correct 13 ms 82880 KB Output is correct
12 Correct 0 ms 82880 KB Output is correct
13 Correct 6 ms 82880 KB Output is correct
14 Correct 6 ms 82880 KB Output is correct
15 Correct 3 ms 82880 KB Output is correct
16 Correct 6 ms 82880 KB Output is correct
17 Correct 6 ms 82880 KB Output is correct
18 Correct 3 ms 82880 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 82880 KB Output is correct
2 Correct 6 ms 82880 KB Output is correct
3 Correct 9 ms 82880 KB Output is correct
4 Correct 13 ms 82880 KB Output is correct
5 Correct 3 ms 82880 KB Output is correct
6 Correct 3 ms 82880 KB Output is correct
7 Correct 13 ms 82880 KB Output is correct
8 Correct 9 ms 82880 KB Output is correct
9 Correct 0 ms 82880 KB Output is correct
10 Correct 6 ms 82880 KB Output is correct
11 Correct 6 ms 82880 KB Output is correct
12 Correct 6 ms 82880 KB Output is correct
13 Correct 9 ms 82880 KB Output is correct
14 Correct 0 ms 82880 KB Output is correct
15 Correct 3 ms 82880 KB Output is correct
16 Correct 0 ms 82880 KB Output is correct
17 Correct 6 ms 82880 KB Output is correct
18 Correct 0 ms 82880 KB Output is correct
19 Correct 9 ms 82880 KB Output is correct
20 Correct 9 ms 82880 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 82880 KB Output is correct
2 Correct 6 ms 82880 KB Output is correct
3 Correct 3 ms 82880 KB Output is correct
4 Correct 9 ms 82880 KB Output is correct
5 Correct 6 ms 82880 KB Output is correct
6 Correct 3 ms 82880 KB Output is correct
7 Correct 6 ms 82880 KB Output is correct
8 Correct 9 ms 82880 KB Output is correct
9 Correct 13 ms 82880 KB Output is correct
10 Correct 3 ms 82880 KB Output is correct
11 Correct 9 ms 82880 KB Output is correct
12 Correct 3 ms 82880 KB Output is correct
13 Correct 16 ms 82880 KB Output is correct
14 Correct 23 ms 82880 KB Output is correct
15 Correct 39 ms 82880 KB Output is correct
16 Correct 19 ms 82880 KB Output is correct
17 Correct 36 ms 82880 KB Output is correct
18 Correct 23 ms 82880 KB Output is correct
19 Correct 29 ms 82880 KB Output is correct

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1000 ms 82880 KB Execution timed out
2 Halted 0 ms 0 KB -