| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 545515 | MohamedAliSaidane | Cave (IOI13_cave) | C++14 | 0 ms | 0 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<bits/stdc++.h>
#include "cave.h"
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef pair<ld,ld> pld;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
#define pb push_back
#define popb pop_back
#define pf push_front
#define popf pop_front
#define all(x) (x).begin(),(x).end()
#define ff first
#define ss second
int nx[4] = {0,0,1,-1}, ny[4] = {1,-1,0,0};
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;}
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);}
/*int N;
vi S, D, C;
void answer(vi A, vi B)
{
for(int i = 0; i < N; i ++)
cout << A[i] << ' ';
cout << '\n';
for(int i = 0; i < N; i ++)
cout << B[i] << ' ';
}
int tryCombination(vi A)
{
for(int door = 0; door < N;door ++)
{
if(A[C[door]] != S[C[door]])
return door;
}
return -1;
}*/
void exploreCave(int n)
{
vi ans(n,0), st(n,0);
vi cur; cur.assign(n,0);
bool vis[n]; memset(vis,false,sizeof(vis));
for(int door = 0; door < n; door ++)
{
int repp = tryCombination(cur);
if(repp == -1 || repp > door)
{
int debut = 0;
int fin = n - 1;
while(debut < fin)
{
int mid = (debut+fin)/2;
for(int i = debut; i <= mid; i ++)
{
if(vis[i])
continue;
cur[i] = 1;
}
int rep = tryCombination(cur);
for(int i = debut; i <= mid; i ++)
{
if(vis[i])
continue;
cur[i] = 0;
}
if(rep == door)
{
fin = mid;
}
else
debut = mid + 1;
}
ans[debut] = door;
st[fin] = cur[fin] = 0;
vis[fin] = 1;
}
else
{
int debut = 0;
int fin = n - 1;
while(debut < fin)
{
int mid = (debut+fin)/2;
for(int i = debut; i <= mid; i ++)
{
if(vis[i])
continue;
cur[i] = 1;
}
int rep = tryCombination(cur);
for(int i = debut; i <= mid; i ++)
{
if(vis[i])
continue;
cur[i] = 0;
}
if(rep > door || rep == -1)
{
fin = mid;
}
else
debut = mid + 1;
}
ans[debut] = door;
st[fin] = cur[fin] = 1;
vis[fin] = 1;
}
}
answer(st,ans);
}/*
int main()
{
ios::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
cin >> N;
S.assign(N,0); D.assign(N,0);
C.assign(N,0);
for(int i = 0; i < N; i ++)
cin >> S[i];
for(int i = 0; i < N; i ++)
cin >> D[i];
for(int i = 0; i < N; i ++)
C[D[i]] = i;
exploreCave(N);
}
*/