| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 818033 | eltu0815 | Counting Mushrooms (IOI20_mushrooms) | C++14 | 7 ms | 464 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "mushrooms.h"
#include <bits/stdc++.h>
#define X 3
using namespace std;
int arr[20005];
vector<int> A, B;
int count_mushrooms(int n) {
std::vector<int> m;
if(n < 5 * X) {
for(int i = 1; i < n; ++i) {
m.clear(); m.push_back(i);
m.push_back(i - 1);
if(use_machine(m) == 1) arr[i] = !arr[i - 1];
else arr[i] = arr[i - 1];
}
int ans = 0;
for(int i = 0; i < n; ++i) if(arr[i] == 0) ++ans;
return ans;
}
for(int i = 1; i <= 2; ++i) {
m.clear(); m.push_back(i - 1); m.push_back(i);
if(use_machine(m) == 1) arr[i] = !arr[i - 1];
else arr[i] = arr[i - 1];
}
int n1, n2;
if(arr[0] == arr[1]) n1 = 0, n2 = 1;
else if(arr[0] == arr[2]) n1 = 0, n2 = 2;
else n1 = 1, n2 = 2;
m.clear(); m.push_back(n1); m.push_back(3);
m.push_back(n2); m.push_back(4);
int tmp = use_machine(m);
if(tmp == 0) arr[3] = arr[4] = arr[n1];
if(tmp == 1) arr[3] = arr[n1], arr[4] = !arr[n1];
if(tmp == 2) arr[3] = !arr[n1], arr[4] = arr[n1];
if(tmp == 3) arr[3] = arr[4] = !arr[n1];
for(int i = 0; i < 5; ++i) {
if(arr[i] == 0) A.push_back(i);
else B.push_back(i);
}
for(int i = 5; i < 5 * X; i += 5) {
if(A.size() >= 3) {
m.clear();
m.push_back(A[0]); m.push_back(i);
m.push_back(A[1]); m.push_back(i + 1);
m.push_back(A[2]); m.push_back(i + 2);
int tmp = use_machine(m);
if(tmp == 0) arr[i] = arr[i + 1] = arr[i + 2] = 0;
if(tmp == 1) arr[i] = arr[i + 1] = 0, arr[i + 2] = 1;
if(tmp == 4) arr[i] = arr[i + 1] = 1, arr[i + 2] = 0;
if(tmp == 5) arr[i] = arr[i + 1] = arr[i + 2] = 1;
if(tmp == 2) arr[i + 2] = 0;
if(tmp == 3) arr[i + 2] = 1;
if(tmp == 2 || tmp == 3) {
if(B.size() >= 2) {
m.clear();
m.push_back(B[0]); m.push_back(i); m.push_back(B[1]);
m.push_back(A[0]); m.push_back(i + 1); m.push_back(A[1]);
m.push_back(i + 3); m.push_back(A[2]); m.push_back(i + 4);
int tmp = use_machine(m); --tmp;
if(tmp < 4) arr[i] = 1, arr[i + 1] = 0;
else arr[i] = 0, arr[i + 1] = 1;
tmp %= 4;
if(tmp == 0) arr[i + 3] = arr[i + 4] = 0;
if(tmp == 1) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 2) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 1;
}
else {
m.clear(); m.push_back(A[0]); m.push_back(i);
int tmp = use_machine(m);
if(tmp == 1) arr[i] = 1, arr[i + 1] = 0;
else arr[i] = 0, arr[i + 1] = 1;
m.clear();
m.push_back(A[0]); m.push_back(i + 3);
m.push_back(A[1]); m.push_back(i + 4);
tmp = use_machine(m);
if(tmp == 0) arr[i + 3] = arr[i + 4] = 0;
if(tmp == 1) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 2) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 1;
}
}
else {
m.clear();
m.push_back(A[0]); m.push_back(i + 3);
m.push_back(A[1]); m.push_back(i + 4);
int tmp = use_machine(m);
if(tmp == 0) arr[i + 3] = arr[i + 4] = 0;
if(tmp == 1) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 2) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 1;
}
}
else {
m.clear();
m.push_back(B[0]); m.push_back(i);
m.push_back(B[1]); m.push_back(i + 1);
m.push_back(B[2]); m.push_back(i + 2);
int tmp = use_machine(m);
if(tmp == 0) arr[i] = arr[i + 1] = arr[i + 2] = 1;
if(tmp == 1) arr[i] = arr[i + 1] = 1, arr[i + 2] = 0;
if(tmp == 4) arr[i] = arr[i + 1] = 0, arr[i + 2] = 1;
if(tmp == 5) arr[i] = arr[i + 1] = arr[i + 2] = 0;
if(tmp == 2) arr[i + 2] = 1;
if(tmp == 3) arr[i + 2] = 0;
if(tmp == 2 || tmp == 3) {
if(A.size() >= 2) {
m.clear();
m.push_back(A[0]); m.push_back(i); m.push_back(A[1]);
m.push_back(B[0]); m.push_back(i + 1); m.push_back(B[1]);
m.push_back(i + 3); m.push_back(B[2]); m.push_back(i + 4);
int tmp = use_machine(m); --tmp;
if(tmp < 4) arr[i] = 0, arr[i + 1] = 1;
else arr[i] = 1, arr[i + 1] = 0;
tmp %= 4;
if(tmp == 0) arr[i + 3] = arr[i + 4] = 1;
if(tmp == 1) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 2) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 0;
}
else {
m.clear(); m.push_back(B[0]); m.push_back(i);
int tmp = use_machine(m);
if(tmp == 1) arr[i] = 0, arr[i + 1] = 1;
else arr[i] = 1, arr[i + 1] = 0;
m.clear();
m.push_back(B[0]); m.push_back(i + 3);
m.push_back(B[1]); m.push_back(i + 4);
tmp = use_machine(m);
if(tmp == 0) arr[i + 3] = arr[i + 4] = 1;
if(tmp == 1) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 2) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 0;
}
}
else {
m.clear();
m.push_back(B[0]); m.push_back(i + 3);
m.push_back(B[1]); m.push_back(i + 4);
int tmp = use_machine(m);
if(tmp == 0) arr[i + 3] = arr[i + 4] = 1;
if(tmp == 1) arr[i + 3] = 1, arr[i + 4] = 0;
if(tmp == 2) arr[i + 3] = 0, arr[i + 4] = 1;
if(tmp == 3) arr[i + 3] = arr[i + 4] = 0;
}
}
for(int j = i; j < i + 5; ++j) {
if(arr[j] == 0) A.push_back(j);
else B.push_back(j);
}
}
int ans = 0;
for(int i = 0; i < 5 * X; ++i) if(arr[i] == 0) ++ans;
int nxt = 0;
for(int i = 5 * X; i < n; i += nxt) {
if(i + (int)max(A.size(), B.size()) <= n) {
m.clear();
for(int j = i; j < i + (int)max(A.size(), B.size()); ++j) {
m.push_back(j);
if(A.size() >= B.size()) m.push_back(A[j - i]);
else m.push_back(B[j - i]);
}
int tmp = use_machine(m);
int cnt = (tmp % 2) + (tmp / 2);
if(A.size() >= B.size()) ans += (int)A.size() - cnt;
else ans += cnt;
nxt = (int)max(A.size(), B.size());
if(tmp % 2 == 1) {
if(A.size() >= B.size()) B.push_back(i);
else A.push_back(i);
}
else {
if(A.size() >= B.size()) A.push_back(i);
else B.push_back(i);
}
}
else {
m.clear();
for(int j = i; j < n; ++j) {
m.push_back(j);
if(A.size() >= B.size()) m.push_back(A[j - i]);
else m.push_back(B[j - i]);
}
int tmp = use_machine(m);
int cnt = (tmp % 2) + (tmp / 2);
if(A.size() >= B.size()) ans += n - i - cnt;
else ans += cnt;
break;
}
}
return ans;
}
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| Fetching results... | ||||