oj.uz

Submission #918483

# Submission time Handle Problem Language Result Execution time Memory
918483 2024-01-29T22:32:19 Z n3rm1n K blocks (IZhO14_blocks) C++17
0 / 100
 1 ms 2396 KB 
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const long long MAXN = 1e5 + 10, MAXK = 105;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
long long n, k, a[MAXN];
void read()
{
    cin >> n >> k;
    for (long long i = 1; i <= n; ++ i)
        cin >> a[i];
}
long long dp[MAXN][MAXK];
void solve()
{
    long long inf = 1e17;
    for (long long j = 1; j <= k; ++ j)
    {
        stack < pair <long long, long long > > t;
        for (long long i = j; i <= n; ++ i)
        {
            dp[i][j] = inf;
            dp[i][j] = dp[i-1][j-1] + a[i];
            long long init = dp[i][j];
            while(!t.empty())
            {
                long long sz = t.top().first;
                long long dpp = t.top().second;

                if(sz <= a[i])
                {
                    if(dpp + a[i] - sz < dp[i][j])dp[i][j] = dpp + a[i] - sz;
                    t.pop();
                }
                else break;
            }
            if(t.size() == 0 || t.top().second > dp[i][j])t.push(make_pair(a[i], dp[i][j]));
            else dp[i][j] = min(dp[i][j], t.top().second);
            //cout << i << " " << j << " --> " << dp[i][j] << endl;
        }
    }
    cout << dp[n][k] << endl;
}
int main()
{
    speed();

    read();
    solve();
    return 0;
}

Compilation message

blocks.cpp: In function 'void solve()':
blocks.cpp:29:23: warning: unused variable 'init' [-Wunused-variable]
   29 |             long long init = dp[i][j];
      |                       ^~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Incorrect 1 ms 2396 KB Output isn't correct
3 Halted 0 ms 0 KB -