Submission #1057368

#	Time	Username	Problem	Language	Result	Execution time	Memory
1057368		c2zi6	Counting Mushrooms (IOI20_mushrooms)	C++14	53.94 / 100	6 ms	600 KiB

mushrooms

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "mushrooms.h"

int count_mushrooms(int n) {
    int x = 140;
    VI mek, zro;
    zro.pb(0);
    int ans = 1;
    int last = 1;
    replr(i, 1, n-1) {
        if (use_machine({0, i})) {
            mek.pb(i);
        } else {
            ans++;
            zro.pb(i);
        }
        last = i+1;
        if (mek.size() == x || zro.size() == x) break;
    }
    while (last < n) {
        VI qr;
        for (int x : (mek.size() > zro.size() ? mek : zro)) {
            qr.pb(x);
            qr.pb(last++);
            if (last >= n) break;
        }
        int ret = use_machine(qr);
        int urish = (ret+1)/2;

        /*cout << "QUERIED ON ";*/
        /*for (int x : qr) cout << x << " "; cout << endl;*/
        /*cout << "DIFFERENT SPECIES " << urish << endl;*/
        /*cout << "ADDED " << qr.size()/2-urish << endl;*/

        if (mek.size() > zro.size()) ans += urish;
        else ans += qr.size()/2 - urish;
    }
    return ans;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:48:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |         if (mek.size() == x || zro.size() == x) break;
      |             ~~~~~~~~~~~^~~~
mushrooms.cpp:48:43: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |         if (mek.size() == x || zro.size() == x) break;
      |                                ~~~~~~~~~~~^~~~

• Subtask 1: 53.9379 / 100