//Never stop trying
/*#pragma GCC target ("avx2")
#pragma GCC optimize ("Ofast")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")*/
#include "bits/stdc++.h"
#ifndef LOCAL
#include "mushrooms.h"
#endif
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
typedef long long ll;
typedef string str;
typedef double db;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
typedef vector<str> vs;
typedef vector<ld> vd;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 2e5 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up
template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
return a + rng() % (b - a + 1);
}
#ifndef LOCAL
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl;
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;
void IO() {
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
const int B=80;
str s;
#ifdef LOCAL
int use_machine(vi v){
str ss;
for(auto i: v) ss+=s[i];
int ans=0;
FOR(i,1,sz(ss)) if(ss[i]!=ss[i-1]) ans++;
return ans;
}
#endif
int count_mushrooms(int N){
vi a,b; //type A/type B
a.pb(0);
int i=1; //index of the first element I don't know
//Preparing a block
while(i<N && sz(a)<B && sz(b)<B){
if((sz(a)<2 && sz(b)<2) || i==N-1){
int x=use_machine({0,i});
if(x==0) a.pb(i);
else b.pb(i);
i++;
}else{
if(sz(a)>=2){
int x=use_machine({i,a[0],i+1,a[1]});
if(x==0) a.pb(i),a.pb(i+1);
else if(x==1) b.pb(i),a.pb(i+1);
else if(x==2) a.pb(i),b.pb(i+1);
else b.pb(i),b.pb(i+1);
}
else{
int x=use_machine({i,b[0],i+1,b[1]});
if(x==0) b.pb(i),b.pb(i+1);
else if(x==1) a.pb(i),b.pb(i+1);
else if(x==2) b.pb(i),a.pb(i+1);
else a.pb(i),a.pb(i+1);
}
i+=2;
}
}
//Using & expanding the block
int ans=sz(a);
while(i<N){
vi v; FOR(idx,i,min(N,i+max(sz(a),sz(b)))) v.pb(idx);
if(sz(a)>=sz(b)){
vi query;
FOR(i,0,sz(v)){
query.pb(a[i]);
query.pb(v[i]);
}
int x=use_machine(query); x++; //number of blocks
ans+=sz(v)-x/2; //x/2==nb of type B
if(x%2==0) b.pb(v.back());
else a.pb(v.back());
}
else{
vi query;
FOR(i,0,sz(v)){
query.pb(b[i]);
query.pb(v[i]);
}
int x=use_machine(query); x++; //number of blocks
ans+=x/2;
if(x%2==0) a.pb(v.back());
else b.pb(v.back());
}
i+=sz(v);
}
return ans;
}
#ifdef LOCAL
int main() {
boost; IO();
cin>>s;
cout << count_mushrooms(sz(s)) << endl;
return 0;
}
#endif
/* Careful!!!
.Array bounds
.Infinite loops
.Uninitialized variables / empty containers
.Multisets are shit
Some insights:
.Binary search
.Graph representation
.Write brute force code
.Change your approach
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
0 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
2 ms |
384 KB |
Output is correct |
| 6 |
Correct |
2 ms |
364 KB |
Output is correct |
| 7 |
Correct |
7 ms |
364 KB |
Output is correct |
| 8 |
Correct |
7 ms |
364 KB |
Output is correct |
| 9 |
Correct |
7 ms |
364 KB |
Output is correct |
| 10 |
Correct |
7 ms |
364 KB |
Output is correct |
| 11 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 12 |
Correct |
7 ms |
492 KB |
Output is correct |
| 13 |
Correct |
12 ms |
364 KB |
Output is correct |
| 14 |
Correct |
6 ms |
364 KB |
Output is correct |
| 15 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 16 |
Partially correct |
9 ms |
384 KB |
Output is partially correct |
| 17 |
Correct |
4 ms |
384 KB |
Output is correct |
| 18 |
Correct |
8 ms |
364 KB |
Output is correct |
| 19 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 20 |
Correct |
7 ms |
364 KB |
Output is correct |
| 21 |
Correct |
7 ms |
412 KB |
Output is correct |
| 22 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 23 |
Correct |
7 ms |
384 KB |
Output is correct |
| 24 |
Correct |
4 ms |
364 KB |
Output is correct |
| 25 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 26 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 27 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 28 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 29 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 30 |
Partially correct |
10 ms |
416 KB |
Output is partially correct |
| 31 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 32 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 33 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 34 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 35 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 36 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 37 |
Partially correct |
9 ms |
364 KB |
Output is partially correct |
| 38 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 39 |
Partially correct |
9 ms |
384 KB |
Output is partially correct |
| 40 |
Partially correct |
7 ms |
416 KB |
Output is partially correct |
| 41 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 42 |
Partially correct |
9 ms |
364 KB |
Output is partially correct |
| 43 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 44 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 45 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 46 |
Partially correct |
10 ms |
492 KB |
Output is partially correct |
| 47 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 48 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 49 |
Partially correct |
9 ms |
364 KB |
Output is partially correct |
| 50 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 51 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 52 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 53 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 54 |
Partially correct |
8 ms |
416 KB |
Output is partially correct |
| 55 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 56 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 57 |
Partially correct |
7 ms |
364 KB |
Output is partially correct |
| 58 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 59 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 60 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 61 |
Partially correct |
8 ms |
364 KB |
Output is partially correct |
| 62 |
Correct |
0 ms |
364 KB |
Output is correct |
| 63 |
Correct |
1 ms |
384 KB |
Output is correct |
| 64 |
Correct |
0 ms |
364 KB |
Output is correct |
| 65 |
Correct |
1 ms |
364 KB |
Output is correct |
| 66 |
Correct |
1 ms |
364 KB |
Output is correct |
| 67 |
Correct |
1 ms |
364 KB |
Output is correct |
| 68 |
Correct |
0 ms |
364 KB |
Output is correct |
| 69 |
Correct |
1 ms |
364 KB |
Output is correct |
| 70 |
Correct |
1 ms |
364 KB |
Output is correct |
| 71 |
Correct |
1 ms |
364 KB |
Output is correct |
| 72 |
Correct |
1 ms |
364 KB |
Output is correct |
| 73 |
Correct |
1 ms |
364 KB |
Output is correct |
| 74 |
Correct |
1 ms |
364 KB |
Output is correct |
| 75 |
Correct |
1 ms |
364 KB |
Output is correct |
| 76 |
Correct |
1 ms |
364 KB |
Output is correct |
| 77 |
Correct |
1 ms |
364 KB |
Output is correct |
| 78 |
Correct |
0 ms |
364 KB |
Output is correct |
| 79 |
Correct |
1 ms |
364 KB |
Output is correct |
| 80 |
Correct |
0 ms |
364 KB |
Output is correct |
| 81 |
Correct |
1 ms |
364 KB |
Output is correct |
| 82 |
Correct |
0 ms |
364 KB |
Output is correct |
| 83 |
Correct |
1 ms |
364 KB |
Output is correct |
| 84 |
Correct |
1 ms |
364 KB |
Output is correct |
| 85 |
Correct |
1 ms |
364 KB |
Output is correct |
| 86 |
Correct |
1 ms |
364 KB |
Output is correct |
| 87 |
Correct |
0 ms |
364 KB |
Output is correct |
| 88 |
Correct |
0 ms |
364 KB |
Output is correct |
| 89 |
Correct |
0 ms |
364 KB |
Output is correct |
| 90 |
Correct |
1 ms |
364 KB |
Output is correct |
| 91 |
Correct |
1 ms |
256 KB |
Output is correct |
