Submission #759755

#	Time	Username	Problem	Language	Result	Execution time	Memory
759755		MilosMilutinovic	Counting Mushrooms (IOI20_mushrooms)	C++14	0 / 100	2 ms	208 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
const int C = 100;
int count_mushrooms(int n) {
    if (n <= 227) {
        int ans = 1;
        for (int i = 1; i < n; i++) {
            ans += !use_machine({0, i});
        }
        return ans;
    }
    vector<int> a(1, 0), b;
    for (int i = 1; i < min(n, C); i++) {
        if (use_machine({0, i}))
            b.push_back(i);
        else
            a.push_back(i);
    }
    int ans = a.size();
    for (int i = C; i < n; i++) {
        int sz = max(a.size(), b.size());
        vector<int> qv;
        for (int j = i; j < min(i + sz + 1, n); j++) {
            if (j != i + sz) {
                if (a.size() == sz)
                    qv.push_back(a[j - i]);
                else
                    qv.push_back(b[j - i]);
            }
            qv.push_back(j);
        }
        int diff = (use_machine(qv) + 1) / 2;
        int same = (qv.size() - sz - diff);
        if (a.size() == sz)
            ans += same;
        else
            ans += diff;
        i += sz + 1;
    }
    return ans;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:26:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |                 if (a.size() == sz)
      |                     ~~~~~~~~~^~~~~
mushrooms.cpp:35:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |         if (a.size() == sz)
      |             ~~~~~~~~~^~~~~

• Subtask 1: 0 / 100