oj.uz

Submission #1048829

# Submission time Handle Problem Language Result Execution time Memory
1048829 2024-08-08T09:42:02 Z RecursiveCo Bikeparking (EGOI24_bikeparking) C++17
44 / 100
 239 ms 25132 KB 
// CF template, version 3.0

#include <bits/stdc++.h>

using namespace std;

#define improvePerformance ios_base::sync_with_stdio(false); cin.tie(0)
#define getTest int t; cin >> t
#define eachTest for (int _var=0;_var<t;_var++)
#define get(name) int (name); cin >> (name)
#define out(o) cout << (o)
#define getList(cnt, name) vector<int> (name); for (int _=0;_<(cnt);_++) { get(a); (name).push_back(a); }
#define sortl(name) sort((name).begin(), (name).end())
#define rev(name) reverse((name).begin(), (name).end())
#define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
#define decision(b) if (b){out("YES");}else{out("NO");}

//#define int long long int

template <typename T, typename I>
struct segtree {
    int n;
    vector<T> tree;
    vector<I> initial;
    T id;

    segtree(int i_n, vector<I> i_initial, T i_id): n(i_n), initial(i_initial), id(i_id) {
        tree.resize(4 * n);
    }

    T conquer(T left, T right) {
        // write your conquer function
    }

    T value(I inp) {
        // write your value function
    }

    void build(int v, int l, int r) {
        if (l == r) tree[v] = value(initial[l]);
        else {
            int middle = (l + r) / 2;
            build(2 * v, l, middle);
            build(2 * v + 1, middle + 1, r);
            tree[v] = conquer(tree[2 * v], tree[2 * v + 1]);
        }
    }

    void upd(int v, int l, int r, int i, I x) {
        if (l == r) tree[v] = value(x);
        else {
            int middle = (l + r) / 2;
            if (middle >= i) upd(2 * v, l, middle, i, x);
            else upd(2 * v + 1, middle + 1, r, i, x);
            tree[v] = conquer(tree[2 * v], tree[2 * v + 1]);
        }
    }

    T query(int v, int l, int r, int ql, int qr) {
        if (ql <= l && r <= qr) return tree[v];
        else if (r < ql || qr < l) return id;
        int middle = (l + r) / 2;
        T left = query(2 * v, l, middle, ql, qr);
        T right = query(2 * v + 1, middle + 1, r, ql, qr);
        return conquer(left, right);
    }
};

// vector<int>

vector<int> X;
vector<int> Y;

int evalfast(int middle) {
    int n = X.size(); // = Y.size()
    int bad = 0;
    int neutral = 0;
    int suf = 0;
    int ptr;
    int only;
    for (int i = n - 1; i >= 0; i--) {
        if (suf + Y[i] >= middle + 1) {
            ptr = i;
            only = middle + 1 - suf;
        }
        suf += Y[i];
    }
    int xpref = 0;
    int ypref = 0;
    bool active = true;
    forto(n, i) {
        if (xpref >= middle + 1) break;
        while (ptr < n) {
            int here = (active? only: Y[ptr]);
            active = false;
            if (ypref + here > xpref) {
                if (i > ptr) bad++;
                else if (i == ptr) neutral++;
                break;
            }
            ypref += here;
            ptr++;
        }
        xpref += X[i];
    }
    if (bad) return -1;
    return neutral;
}

pair<int, int> evalslow(int middle) {
    vector<array<int, 3>> events;
    int pref = 0;
    int n = X.size(); // = Y.size()
    forto(n, i) {
        if (pref >= middle + 1) break;
        events.push_back({pref, 0, i});
        pref += X[i];
    }
    int suf = 0;
    for (int i = n - 1; i >= 0; i--) {
        if (suf >= middle + 1) break;
        suf += Y[i];
        events.push_back({max(0, middle + 1 - suf), 1, i});
    }
    sortl(events);
    int bad = 0;
    int nvals = 0;
    int neutral = 0;
    int x = 0;
    int y = 0;
    int ptr = 0;
    int s = events.size();
    int val = 0;
    while (ptr < s) {
        while (ptr < s && events[ptr][0] == val) {
            int typ = events[ptr][1];
            int setto = events[ptr][2];
            if (typ) y = setto;
            else x = setto;
            ptr++;
        }
        if (y < x) bad++;
        else if (y == x) nvals++, neutral += (ptr < s? events[ptr][0]: middle + 1) - val;
        if (ptr < s) val = events[ptr][0];
    }
    if (bad) return {-1, -1};
    return {nvals, neutral};
}

signed main() {
    improvePerformance;
    get(n);
    forto(n, i) {
        get(x);
        X.push_back(x);
    }
    forto(n, i) {
        get(y);
        Y.push_back(y);
    }
    int ysum = 0;
    forto(n, i) ysum += Y[i];
    if (ysum == 0) {
        out(0);
        return 0;
    }
    int xsum = 0;
    forto(n, i) {
        if (xsum + X[i] >= ysum) {
            X[i] = ysum - xsum;
            break;
        }
        xsum += X[i];
    }
    int l = 0;
    int r = ysum;
    while (r - l > 1) {
        int middle = (l + r) / 2;
        int value = evalfast(middle);
        if (value == -1 || value > 2) r = middle;
        else l = middle;
    }
    if (evalslow(l).second == -1) out(-ysum);
    else out((l + 1) - (ysum - (l + 1)) - evalslow(l).second);
}

Compilation message

Main.cpp: In function 'int evalfast(int)':
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:91:5: note: in expansion of macro 'forto'
   91 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'std::pair<int, int> evalslow(int)':
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:114:5: note: in expansion of macro 'forto'
  114 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'int main()':
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'n' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:152:5: note: in expansion of macro 'get'
  152 |     get(n);
      |     ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:153:5: note: in expansion of macro 'forto'
  153 |     forto(n, i) {
      |     ^~~~~
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'x' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:154:9: note: in expansion of macro 'get'
  154 |         get(x);
      |         ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:157:5: note: in expansion of macro 'forto'
  157 |     forto(n, i) {
      |     ^~~~~
Main.cpp:10:23: warning: unnecessary parentheses in declaration of 'y' [-Wparentheses]
   10 | #define get(name) int (name); cin >> (name)
      |                       ^
Main.cpp:158:9: note: in expansion of macro 'get'
  158 |         get(y);
      |         ^~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:162:5: note: in expansion of macro 'forto'
  162 |     forto(n, i) ysum += Y[i];
      |     ^~~~~
Main.cpp:15:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   15 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
Main.cpp:168:5: note: in expansion of macro 'forto'
  168 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'int evalfast(int)':
Main.cpp:96:23: warning: 'only' may be used uninitialized in this function [-Wmaybe-uninitialized]
   96 |             if (ypref + here > xpref) {
      |                 ~~~~~~^~~~~~
Main.cpp:93:20: warning: 'ptr' may be used uninitialized in this function [-Wmaybe-uninitialized]
   93 |         while (ptr < n) {
      |                ~~~~^~~

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 596 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 19 ms 4560 KB Output is correct
6 Correct 167 ms 23280 KB Output is correct
7 Correct 182 ms 25132 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 18 ms 4508 KB Output is correct
3 Correct 164 ms 22900 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 226 ms 22060 KB Output is correct
11 Correct 221 ms 22652 KB Output is correct
12 Correct 222 ms 22984 KB Output is correct
13 Correct 237 ms 22200 KB Output is correct
14 Correct 181 ms 22284 KB Output is correct
15 Correct 188 ms 24084 KB Output is correct
16 Correct 239 ms 22704 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #4
0.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 596 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 1 ms 504 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 600 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Incorrect 0 ms 348 KB Output isn't correct
60 Halted 0 ms 0 KB -

Subtask #5
0.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 596 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 19 ms 4560 KB Output is correct
27 Correct 167 ms 23280 KB Output is correct
28 Correct 182 ms 25132 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 18 ms 4508 KB Output is correct
34 Correct 164 ms 22900 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 226 ms 22060 KB Output is correct
42 Correct 221 ms 22652 KB Output is correct
43 Correct 222 ms 22984 KB Output is correct
44 Correct 237 ms 22200 KB Output is correct
45 Correct 181 ms 22284 KB Output is correct
46 Correct 188 ms 24084 KB Output is correct
47 Correct 239 ms 22704 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 1 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 0 ms 348 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 1 ms 504 KB Output is correct
71 Correct 1 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 0 ms 348 KB Output is correct
74 Correct 0 ms 348 KB Output is correct
75 Correct 1 ms 348 KB Output is correct
76 Correct 0 ms 348 KB Output is correct
77 Correct 0 ms 348 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 0 ms 600 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 0 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 1 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Incorrect 0 ms 348 KB Output isn't correct
88 Halted 0 ms 0 KB -