oj.uz

Submission #831464

# Submission time Handle Problem Language Result Execution time Memory
831464 2023-08-20T09:27:00 Z maomao90 Giraffes (JOI22_giraffes) C++17
59 / 100
 7000 ms 624 KB 
// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

#define REP(i, s, e) for (int i = (s); i < (e); i++)
#define RREP(i, s, e) for (int i = (s); i >= (e); i--)
template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define SZ(_a) (int) _a.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 8005;

int n;
int p[MAXN];
//int dp[MAXN][MAXN][MAXN];
viii pdp, ndp;

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n;
    REP (i, 1, n + 1) {
        cin >> p[i];
        p[i]--;
    }
    pdp.pb({1, n, 0});
    REP (x, 0, n + 1) {
        ndp.clear();
        REP (l, 1, n + 1) { // p[l] is min
            int r = -INF;
            for (auto [pl, pr, pmn] : pdp) {
                if (l < pl || l > pr) {
                    continue;
                }
                int pmx = pmn + pr - pl;
                if (p[l] < pmn || p[l] > pmx) {
                    continue;
                }
                int tr = pr - max(0, p[l] - pmn - (l - pl));
                mxto(r, tr);
            }
            if (r != -INF) {
                ndp.pb({l + 1, r, p[l] + 1});
            }
        }
        REP (l, 1, n + 1) { // p[l] is max
            int r = -INF;
            for (auto [pl, pr, pmn] : pdp) {
                if (l < pl || l > pr) {
                    continue;
                }
                int pmx = pmn + pr - pl;
                if (p[l] < pmn || p[l] > pmx) {
                    continue;
                }
                int tr = pr - max(0, pmx - p[l] - (l - pl));
                mxto(r, tr);
            }
            if (r != -INF) {
                ndp.pb({l + 1, r, p[l] - (r - l)});
            }
        }
        REP (r, 1, n + 1) { // p[r] is min
            int l = INF;
            for (auto [pl, pr, pmn] : pdp) {
                if (r < pl || r > pr) {
                    continue;
                }
                int pmx = pmn + pr - pl;
                if (p[r] < pmn || p[r] > pmx) {
                    continue;
                }
                int tl = pl + max(0, p[r] - pmn - (pr - r));
                mnto(l, tl);
            }
            if (l != INF) {
                ndp.pb({l, r - 1, p[r] + 1});
            }
        }
        REP (r, 1, n + 1) { // p[r] is max
            int l = INF;
            for (auto [pl, pr, pmn] : pdp) {
                if (r < pl || r > pr) {
                    continue;
                }
                int pmx = pmn + pr - pl;
                if (p[r] < pmn || p[r] > pmx) {
                    continue;
                }
                int tl = pl + max(0, pmx - p[r] - (pr - r));
                mnto(l, tl);
            }
            if (l != INF) {
                ndp.pb({l, r - 1, p[r] - (r - l)});
            }
        }
        if (ndp.empty()) {
            cout << n - x << '\n';
            return 0;
        }
        swap(ndp, pdp);
    }
    /*
    RREP (l, n, 1) {
        REP (r, l, n + 1) {
            REP (mn, 0, n) {
                int mx = mn + (r - l);
                dp[l][r][mn] = max({
                        dp[l + 1][r][mn + 1] + (p[l] == mn),
                        dp[l + 1][r][mn] + (p[l] == mx),
                        dp[l][r - 1][mn + 1] + (p[r] == mn),
                        dp[l][r - 1][mn] + (p[r] == mx)});
            }
        }
    }
    cout << n - dp[1][n][0] << '\n';
    */
    return 0;
}

Subtask #1
10.0 / 10.0

# 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 1 ms 212 KB Output is correct
4 Correct 0 ms 324 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #2
22.0 / 22.0

# 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 1 ms 212 KB Output is correct
4 Correct 0 ms 324 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 324 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #3
27.0 / 27.0

# 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 1 ms 212 KB Output is correct
4 Correct 0 ms 324 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 324 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 6 ms 320 KB Output is correct
23 Correct 32 ms 320 KB Output is correct
24 Correct 61 ms 340 KB Output is correct
25 Correct 92 ms 360 KB Output is correct
26 Correct 96 ms 364 KB Output is correct
27 Correct 104 ms 376 KB Output is correct
28 Correct 104 ms 368 KB Output is correct
29 Correct 108 ms 364 KB Output is correct
30 Correct 107 ms 372 KB Output is correct

Subtask #4
0 / 41.0

# 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 1 ms 212 KB Output is correct
4 Correct 0 ms 324 KB Output is correct
5 Correct 0 ms 320 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 324 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 324 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 6 ms 320 KB Output is correct
23 Correct 32 ms 320 KB Output is correct
24 Correct 61 ms 340 KB Output is correct
25 Correct 92 ms 360 KB Output is correct
26 Correct 96 ms 364 KB Output is correct
27 Correct 104 ms 376 KB Output is correct
28 Correct 104 ms 368 KB Output is correct
29 Correct 108 ms 364 KB Output is correct
30 Correct 107 ms 372 KB Output is correct
31 Execution timed out 7059 ms 624 KB Time limit exceeded
32 Halted 0 ms 0 KB -