oj.uz

Submission #529580

# Submission time Handle Problem Language Result Execution time Memory
529580 2022-02-23T08:23:28 Z syl123456 Group Photo (JOI21_ho_t3) C++17
64 / 100
 5000 ms 3928 KB 
#include <bits/stdc++.h>
#define all(i) (i).begin(), (i).end()
using namespace std;
#define debug(args...) cout << '[' << #args << "] is [", DEBUG(false, args), cout << ']' << endl
template<typename T>
void DEBUG(bool _sp, T i) {
    if (_sp)
        cout << ' ';
    cout << i;
}
template<typename T, typename ...U>
void DEBUG(bool _sp, T i, U ...j) {
    if (_sp)
        cout << ' ';
    cout << i;
    DEBUG(true, j...);
}
template<typename T, typename U>
ostream& operator << (ostream &i, pair<T, U> j) {
    i << '(' << j.first << ", " << j.second << ')';
}
template<typename T>
ostream& operator << (ostream &i, vector<T> j) {
    i << '{' << j.size() << " :";
    for (T _i : j)
        i << ' ' << _i;
    i << '}';
}

typedef long long ll;
typedef pair<int, int> pi;
typedef double dd;

const int inf = 0x3f3f3f3f, lg = 20;
const ll mod = 1e9 + 7, INF = 0x3f3f3f3f3f3f3f3f;

struct seg {
    int l, r, v;
    seg *ch[2]{};
    seg(int _l, int _r) : l(_l), r(_r), v(0) {
        if (l < r - 1)
            ch[0] = new seg(l, l + r >> 1), ch[1] = new seg(l + r >> 1, r);
    }
    seg(seg *i) : l(i->l), r(i->r), v(i->v), ch{i->ch[0], i->ch[1]} {}
    seg* modify(int i) {
        seg *cpy = new seg(this);
        ++cpy->v;
        if (l == r - 1)
            return cpy;
        int x = i >= l + r >> 1;
        cpy->ch[x] = cpy->ch[x]->modify(i);
        return cpy;
    }
    int query(int _l, int _r) {
        if (_l <= l && r <= _r)
            return v;
        int res = 0;
        if (_l < l + r >> 1)
            res += ch[0]->query(_l, _r);
        if (l + r >> 1 < _r)
            res += ch[1]->query(_l, _r);
        return res;
    }
};

vector<seg*> rts;

int query(int l, int r, int vl, int vr) {
    //0-base[l,r), 0-base[vl, vr)
    if (l == r || vl == vr)
        return 0;
    return rts[r]->query(vl, vr) - rts[l]->query(vl, vr);
}

signed main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n;
    rts.push_back(new seg(0, n));
    int pos[n];
    for (int i = 0, x; i < n; ++i)
        cin >> x, pos[--x] = i, rts.push_back(rts.back()->modify(x));
    int dp[n + 1];
    dp[0] = dp[1] = 0;
    for (int i = 2; i <= n; ++i) {
        dp[i] = inf;
        int tmp = 0, mn = n - i;
        for (int j = 1; j <= i; ++j) {
            int x = mn + j - 1, y = pos[x];
            tmp -= query(y + 1, n, mn, x);
            tmp += query(0, y, x + 1, n);
            tmp += query(0, y, mn, x);
            dp[i] = min(dp[i], dp[i - j] + tmp);
        }
    }
    cout << dp[n];
}
/*
x+1 x+2 x/
x+1 x x+2
x+2 x+1 x

1 [N-1]

2 1 [N-2]

3 2 1 [N-3]

f(n) = min{
    k,k-1,..,1, [n-k]
    f(n-k) + <last n-k><first k> + <first i-1><i (<=k)>
} 1 <= k <= n



*/

Compilation message

Main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::pair<_T1, _T2>)':
Main.cpp:21:1: warning: no return statement in function returning non-void [-Wreturn-type]
   21 | }
      | ^
Main.cpp: In function 'std::ostream& operator<<(std::ostream&, std::vector<_Tp>)':
Main.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type]
   28 | }
      | ^
Main.cpp: In constructor 'seg::seg(int, int)':
Main.cpp:42:34: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |             ch[0] = new seg(l, l + r >> 1), ch[1] = new seg(l + r >> 1, r);
      |                                ~~^~~
Main.cpp:42:63: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   42 |             ch[0] = new seg(l, l + r >> 1), ch[1] = new seg(l + r >> 1, r);
      |                                                             ~~^~~
Main.cpp: In member function 'seg* seg::modify(int)':
Main.cpp:50:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   50 |         int x = i >= l + r >> 1;
      |                      ~~^~~
Main.cpp: In member function 'int seg::query(int, int)':
Main.cpp:58:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   58 |         if (_l < l + r >> 1)
      |                  ~~^~~
Main.cpp:60:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |         if (l + r >> 1 < _r)
      |             ~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 284 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 312 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 284 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 312 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 312 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 284 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 312 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 312 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 10 ms 332 KB Output is correct
22 Correct 9 ms 416 KB Output is correct
23 Correct 8 ms 332 KB Output is correct
24 Correct 8 ms 412 KB Output is correct
25 Correct 11 ms 412 KB Output is correct
26 Correct 8 ms 332 KB Output is correct
27 Correct 9 ms 332 KB Output is correct
28 Correct 11 ms 332 KB Output is correct
29 Correct 8 ms 332 KB Output is correct
30 Correct 8 ms 332 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 284 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 312 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 312 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 10 ms 332 KB Output is correct
22 Correct 9 ms 416 KB Output is correct
23 Correct 8 ms 332 KB Output is correct
24 Correct 8 ms 412 KB Output is correct
25 Correct 11 ms 412 KB Output is correct
26 Correct 8 ms 332 KB Output is correct
27 Correct 9 ms 332 KB Output is correct
28 Correct 11 ms 332 KB Output is correct
29 Correct 8 ms 332 KB Output is correct
30 Correct 8 ms 332 KB Output is correct
31 Correct 165 ms 784 KB Output is correct
32 Correct 191 ms 784 KB Output is correct
33 Correct 176 ms 788 KB Output is correct
34 Correct 174 ms 716 KB Output is correct
35 Correct 170 ms 716 KB Output is correct
36 Correct 159 ms 792 KB Output is correct
37 Correct 165 ms 796 KB Output is correct
38 Correct 170 ms 784 KB Output is correct
39 Correct 163 ms 796 KB Output is correct
40 Correct 174 ms 788 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 284 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 312 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 312 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 312 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 10 ms 332 KB Output is correct
22 Correct 9 ms 416 KB Output is correct
23 Correct 8 ms 332 KB Output is correct
24 Correct 8 ms 412 KB Output is correct
25 Correct 11 ms 412 KB Output is correct
26 Correct 8 ms 332 KB Output is correct
27 Correct 9 ms 332 KB Output is correct
28 Correct 11 ms 332 KB Output is correct
29 Correct 8 ms 332 KB Output is correct
30 Correct 8 ms 332 KB Output is correct
31 Correct 165 ms 784 KB Output is correct
32 Correct 191 ms 784 KB Output is correct
33 Correct 176 ms 788 KB Output is correct
34 Correct 174 ms 716 KB Output is correct
35 Correct 170 ms 716 KB Output is correct
36 Correct 159 ms 792 KB Output is correct
37 Correct 165 ms 796 KB Output is correct
38 Correct 170 ms 784 KB Output is correct
39 Correct 163 ms 796 KB Output is correct
40 Correct 174 ms 788 KB Output is correct
41 Execution timed out 5050 ms 3928 KB Time limit exceeded
42 Halted 0 ms 0 KB -