oj.uz

Submission #1048846

# Submission time Handle Problem Language Result Execution time Memory
1048846 2024-08-08T09:49:32 Z RecursiveCo Bikeparking (EGOI24_bikeparking) C++17
16 / 100
 92 ms 14024 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;
        if (ypref <= xpref) {
            while (ptr < n) {
                int here = (active? only: Y[ptr]);
                active = false;
                ypref += here;
                if (ypref + here > xpref) {
                    if (i > ptr) bad++;
                    else if (i == ptr) neutral++;
                    break;
                }
                ptr++;
            }
        } else {
            if (i > ptr) bad++;
            else if (i == ptr) neutral++;
        }
        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:119:5: note: in expansion of macro 'forto'
  119 |     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:157:5: note: in expansion of macro 'get'
  157 |     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:158:5: note: in expansion of macro 'forto'
  158 |     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:159:9: note: in expansion of macro 'get'
  159 |         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:162:5: note: in expansion of macro 'forto'
  162 |     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:163:9: note: in expansion of macro 'get'
  163 |         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:167:5: note: in expansion of macro 'forto'
  167 |     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:173:5: note: in expansion of macro 'forto'
  173 |     forto(n, i) {
      |     ^~~~~
Main.cpp: In function 'int evalfast(int)':
Main.cpp:98:27: warning: 'only' may be used uninitialized in this function [-Wmaybe-uninitialized]
   98 |                 if (ypref + here > xpref) {
      |                     ~~~~~~^~~~~~
Main.cpp:94:24: warning: 'ptr' may be used uninitialized in this function [-Wmaybe-uninitialized]
   94 |             while (ptr < n) {
      |                    ~~~~^~~

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 384 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 348 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 1 ms 344 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
0.0 / 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 Incorrect 0 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 18 ms 4564 KB Output is correct
3 Incorrect 92 ms 14024 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 384 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 348 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 1 ms 344 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 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 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 344 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 0 ms 348 KB Output is correct
43 Incorrect 0 ms 348 KB Output isn't correct
44 Halted 0 ms 0 KB -

Subtask #5
0.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 384 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 348 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 1 ms 344 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 Incorrect 0 ms 348 KB Output isn't correct
26 Halted 0 ms 0 KB -