Submission #388048

#	Time	Username	Problem	Language	Result	Execution time	Memory
388048		Supersonic	Counting Mushrooms (IOI20_mushrooms)	C++14	25 / 100	148 ms	496 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;
int count_mushrooms(int n) {
	int k=20001;
	vector<int> a;vector<int> b;a.push_back(0);
	int r1=use_machine({0,1});if(r1)b.push_back(1);else a.push_back(1);
	if(n==2)return a.size();
	int r2=use_machine({0,2});if(r2)b.push_back(2);else a.push_back(2);
	if(n==3)return a.size();
	int c=3;
	if(a.size()>=2){
		while(c<n-1&&max(a.size(),b.size())<k){
			r1=use_machine({a[0],c,a[1],c+1});
			if(r1==0){a.push_back(c);a.push_back(c+1);}
			if(r1==1){a.push_back(c);b.push_back(c+1);}
			if(r1==2){b.push_back(c);a.push_back(c+1);}
			if(r1==3){b.push_back(c);b.push_back(c+1);}
			c+=2;
		}
	}
	else{
		while(c<n-1&&max(a.size(),b.size())<k){
			r1=use_machine({b[0],c,b[1],c+1});
			if(r1==0){b.push_back(c);b.push_back(c+1);}
			if(r1==1){b.push_back(c);a.push_back(c+1);}
			if(r1==2){a.push_back(c);b.push_back(c+1);}
			if(r1==3){a.push_back(c);a.push_back(c+1);}
			c+=2;
		}
	}
	if(c==n-1){
		if(use_machine({0,n-1})==1)b.push_back(n-1);
		else a.push_back(n-1);
		c++;
	}
	if(c==n)return a.size();
	return 0;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:13:38: warning: comparison of integer expressions of different signedness: 'const long unsigned int' and 'int' [-Wsign-compare]
   13 |   while(c<n-1&&max(a.size(),b.size())<k){
      |                ~~~~~~~~~~~~~~~~~~~~~~^~
mushrooms.cpp:23:38: warning: comparison of integer expressions of different signedness: 'const long unsigned int' and 'int' [-Wsign-compare]
   23 |   while(c<n-1&&max(a.size(),b.size())<k){
      |                ~~~~~~~~~~~~~~~~~~~~~~^~

• Subtask 1: 25 / 100