#include "mushrooms.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
using namespace std;
const int S = 210;
int brute(int n){
//A = 0 | B = 1
vector<int> type(n,-1);
type[0] = 0;
int pos = -1;
for(int i = 1;i<n;i++){
if(use_machine({0,i}) == 0){
pos = i;
type[i] = 0;
break;
}else{
type[i] = 1;
}
}
// cerr << pos << endl;
int a=pos+1,b=pos+2;
while(pos != -1){
if(a >= n)break;
if(b >= n){
if(use_machine({0,a}) == 0){
type[a] = 0;
}else{
type[a] = 1;
}
}else{
int val = use_machine({a,0,b,pos});
if(val == 0){
type[a] = 0;
type[b] = 0;
}else if(val == 1){
type[a] = 1;
type[b] = 0;
}else if(val == 2){
type[a] = 0;
type[b] = 1;
}else if(val == 3){
type[a] = 1;
type[b] = 1;
}
}
a += 2;
b += 2;
}
int ans = 0;
// for(int i=0;i<n;i++)cerr << type[i] << " ";
// cerr << endl;
for(int i=0;i<n;i++)ans += (type[i]+1)%2;
return ans;
}
int count_mushrooms(int n) {
if(n < S+20)return brute(n);
vector<int> A,B;
deque<int> left;
A.push_back(0);
for(int i=1;i<n;i++)left.push_back(i);
while(max(A.size(),B.size()) < S && left.size() > 0){
int val = use_machine({0,left[0],left[1]});
if(val == 0){
A.push_back(left[0]);
A.push_back(left[1]);
}else if(val == 1){
B.push_back(left[1]);
left.push_back(left[0]);
}else{
B.push_back(left[0]);
A.push_back(left[1]);
}
left.pop_front();
left.pop_front();
}
int ans = A.size();
while(left.size() > 0){
if(A.size() > B.size()){
vector<int> q;
int m = 0,k = 0;
while(m < A.size() && k < left.size()){
q.push_back(A[m]);m++;
if(m < A.size()){
q.push_back(left[k]);k++;
}
}
ans += k-(use_machine(q)/2);
for(int i = 0;i<k;i++)left.pop_front();
}else{
vector<int> q;
int m = 0,k = 0;
while(m < B.size() && k < left.size()){
q.push_back(B[m]);m++;
if(m < B.size()){
q.push_back(left[k]);k++;
}
}
ans += use_machine(q)/2;
for(int i = 0;i<k;i++)left.pop_front();
}
}
return ans;
}
Compilation message
mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:97:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
97 | while(m < A.size() && k < left.size()){
| ~~^~~~~~~~~~
mushrooms.cpp:97:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
97 | while(m < A.size() && k < left.size()){
| ~~^~~~~~~~~~~~~
mushrooms.cpp:99:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
99 | if(m < A.size()){
| ~~^~~~~~~~~~
mushrooms.cpp:108:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
108 | while(m < B.size() && k < left.size()){
| ~~^~~~~~~~~~
mushrooms.cpp:108:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
108 | while(m < B.size() && k < left.size()){
| ~~^~~~~~~~~~~~~
mushrooms.cpp:110:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
110 | if(m < B.size()){
| ~~^~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
1 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
1 ms |
344 KB |
Output is correct |
| 6 |
Partially correct |
2 ms |
344 KB |
Output is partially correct |
| 7 |
Correct |
6 ms |
344 KB |
Output is correct |
| 8 |
Correct |
4 ms |
344 KB |
Output is correct |
| 9 |
Correct |
3 ms |
344 KB |
Output is correct |
| 10 |
Partially correct |
4 ms |
344 KB |
Output is partially correct |
| 11 |
Incorrect |
5 ms |
344 KB |
Answer is not correct. |
| 12 |
Halted |
0 ms |
0 KB |
- |
