oj.uz

Submission #258265

# Submission time Handle Problem Language Result Execution time Memory
258265 2020-08-05T15:33:57 Z karma K blocks (IZhO14_blocks) C++14
0 / 100
 14 ms 8704 KB 
#include <bits/stdc++.h>
#define pb          emplace_back
#define ll          long long
#define fi          first
#define se          second
#define mp          make_pair
//#define int         int64_t

using namespace std;

const int N = int(1e6) + 7;
const int inf = 1e9 + 1;
typedef pair<ll, ll> pii;

struct TNode {
    int x, y, ans;
    TNode() {x = y = ans = inf;}
    TNode(int x, int y): x(x), y(y) {
        ans = x + y;
    }
    void minimize(const TNode& o) {
        x = min(x, o.x);
        ans = min(ans, x + y);
    }
};
int f[2][N], n, k, a[N];
vector<TNode> v;

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define Task        "test"
    if(fopen(Task".inp", "r")) {
        freopen(Task".inp", "r", stdin);
        freopen(Task".out", "w", stdout);
    }
    cin >> n >> k;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    fill_n(&f[0][0], 2 * N, inf);
    f[0][0] = 0; TNode cur;
    for(int i = 1; i <= k; ++i) {
        v.clear();
        for(int j = i; j <= n; ++j) {
            cur = TNode(f[(i & 1) ^ 1][j - 1], a[j]);
            while(v.size() && v.back().y <= cur.y) {
                cur.minimize(v.back());
                v.pop_back();
            }
            if(v.size()) f[i & 1][j] = v.back().ans;
            else f[i & 1][j] = inf;
            f[i & 1][j] = min(f[i & 1][j], cur.ans);
            v.pb(cur);
        }
    }
    cout << f[k & 1][n];
}

Compilation message

blocks.cpp: In function 'int32_t main()':
blocks.cpp:34:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:35:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8192 KB Output is correct
2 Correct 4 ms 8208 KB Output is correct
3 Correct 4 ms 8192 KB Output is correct
4 Correct 4 ms 8192 KB Output is correct
5 Correct 4 ms 8192 KB Output is correct
6 Correct 4 ms 8192 KB Output is correct
7 Correct 4 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 4 ms 8192 KB Output is correct
11 Correct 5 ms 8192 KB Output is correct
12 Correct 5 ms 8192 KB Output is correct
13 Incorrect 4 ms 8192 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8192 KB Output is correct
2 Correct 4 ms 8192 KB Output is correct
3 Correct 4 ms 8192 KB Output is correct
4 Correct 4 ms 8192 KB Output is correct
5 Correct 4 ms 8192 KB Output is correct
6 Correct 4 ms 8192 KB Output is correct
7 Correct 5 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 7 ms 8192 KB Output is correct
10 Correct 5 ms 8192 KB Output is correct
11 Correct 4 ms 8192 KB Output is correct
12 Correct 4 ms 8192 KB Output is correct
13 Correct 5 ms 8192 KB Output is correct
14 Correct 5 ms 8192 KB Output is correct
15 Incorrect 4 ms 8192 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 8192 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 8224 KB Output is correct
2 Correct 10 ms 8704 KB Output is correct
3 Incorrect 14 ms 8704 KB Output isn't correct
4 Halted 0 ms 0 KB -