Submission #1058950

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058950		RecursiveCo	Counting Mushrooms (IOI20_mushrooms)	C++17	56.78 / 100	6 ms	596 KiB

mushrooms

// CF template, version 3.0

#include <bits/stdc++.h>
#include "mushrooms.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>

int count_mushrooms(int n) {
    int a = 1;
    int b = 0;
    vector<int> A;
    vector<int> B;
    A.push_back(0);
    forto(min(n - 1, 200), i) {
        vector<int> X;
        X.push_back(0);
        X.push_back(i + 1);
        int pairs = use_machine(X);
        if (pairs) B.push_back(i + 1), b++;
        else A.push_back(i + 1), a++;
    }
    if (n > 201) {
        n -= 201;
        int ind = 201;
        while (n) {
            int num = min(n, 100);
            vector<int> X;
            if (A.size() >= 101) {
                forto(num, i) X.push_back(A[i]), X.push_back(ind + i);
                X.push_back(A[num]);
                int pairs = use_machine(X);
                a += num - pairs / 2;
            } else {
                forto(num, i) X.push_back(B[i]), X.push_back(ind + i);
                X.push_back(B[num]);
                int pairs = use_machine(X);
                a += pairs / 2;
            }
            n -= num;
            ind += num;
        }
    }
    return a;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:16:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   16 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
mushrooms.cpp:78:5: note: in expansion of macro 'forto'
   78 |     forto(min(n - 1, 200), i) {
      |     ^~~~~
mushrooms.cpp:16:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   16 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
mushrooms.cpp:93:17: note: in expansion of macro 'forto'
   93 |                 forto(num, i) X.push_back(A[i]), X.push_back(ind + i);
      |                 ^~~~~
mushrooms.cpp:16:35: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   16 | #define forto(name, var) for (int (var) = 0; (var) < (name); (var)++)
      |                                   ^
mushrooms.cpp:98:17: note: in expansion of macro 'forto'
   98 |                 forto(num, i) X.push_back(B[i]), X.push_back(ind + i);
      |                 ^~~~~

• Subtask 1: 56.7839 / 100