Submission #607575

#	Time	Username	Problem	Language	Result	Execution time	Memory
607575		keta_tsimakuridze	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	9 ms	464 KiB

mushrooms

#include "mushrooms.h"
#include<bits/stdc++.h>
using namespace std;
int count_mushrooms(int n) {
	vector<int> A, B, x;
	for(int i = 1; i < n; i++) x.push_back(i);
	A.push_back(0);
	int cntA = 1;
	while(x.size()) {
        if(A.size() >= B.size()) {
            vector<int> v;
            int nn = 0;
            for(int i = 0; i < A.size(); i++) {
                v.push_back(A[i]);
                v.push_back(x.back());
                x.pop_back(); ++nn;
                if(!x.size()) break;
            }
            int x = use_machine(v);
            cntA += nn - (x / 2 + x % 2);
            if(x % 2) B.push_back(v.back());
            else A.push_back(v.back());
        } else {
            vector<int> v;
            int nn = 0;
            for(int i = 0; i < B.size(); i++) {
                v.push_back(B[i]);
                v.push_back(x.back());
                x.pop_back(); ++nn;
                if(!x.size()) break;
            }
            int x = use_machine(v);
            cntA += (x / 2 + x % 2);
            if(x % 2 == 0) B.push_back(v.back());
            else A.push_back(v.back());
        }
	}
	return cntA;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:13:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |             for(int i = 0; i < A.size(); i++) {
      |                            ~~^~~~~~~~~~
mushrooms.cpp:26:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |             for(int i = 0; i < B.size(); i++) {
      |                            ~~^~~~~~~~~~

• Subtask 1: 80.7143 / 100