oj.uz

Submission #671806

# Submission time Handle Problem Language Result Execution time Memory
671806 2022-12-14T02:49:08 Z Alihan_8 K blocks (IZhO14_blocks) C++17
0 / 100
 1 ms 324 KB 
#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int n, k; cin >> n >> k;
    const int inf = 1e15;
    vector <int> p(n+1, inf);
    for ( int i = 1; i <= n; i++ ) cin >> p[i];
    vector <vector<int>> dp(k+1, vector <int> (n+1, inf));
    vector <int> f(n+1, inf);
    dp[0][0] = 0;
    auto chmin = [&](int &l, int r){l = min(l, r);};
    for ( int i = 1; i <= k; i++ ){
        stack <int> st;
        st.push(0);
        int Mx = -inf;
        for ( int j = 1; j <= n; j++ ){
            Mx = max(Mx, p[j]);
            if ( i == 1 ) dp[i][j] = Mx;
            while ( p[st.top()] <= p[j] ){
                int last = st.top(); st.pop();
                chmin(f[st.top()], f[last]);
            }
            chmin(dp[i][j], dp[i][st.top()]);
            chmin(dp[i][j], f[st.top()]+p[j]);
            st.push(j);
        }
        for ( int j = 1; j <= n; j++ ) f[j] = dp[i][j];
    }
    cout << dp[k].back();

    cout << '\n';
}

Compilation message

blocks.cpp: In function 'void IO(std::string)':
blocks.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 324 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 316 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Incorrect 1 ms 212 KB Output isn't correct
11 Halted 0 ms 0 KB -