#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
ll n,m;
bool have[150005][3];
auto comp=[](pair<ll,pii> a, pair<ll, pii> b)
{
if(a.first!=b.first)
return a.first>b.first;
int linA=a.second.first,linB=b.second.first;
if(linA!=linB)
return linA<linB;
int colA=a.second.second,colB=b.second.second;
return colA<colB;
};
multiset<pair<ll,pii>,decltype(comp)> s(comp);
set<int> poz;
pii where[30005],best[55];
ll dist(ll a, ll b, ll c, ll d)
{
return (a-c)*(a-c)+(b-d)*(b-d);
}
int rgt[150005],lft[150005];
vector<int> v;
void putseg(int st,int dr)
{
int mij=(st+dr)/2;
for(int a=st;a<=st+1;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.insert({minim,{a,j}});
}
for(int a=mij-1;a<=mij+1;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.insert({minim,{a,j}});
}
for(int a=dr-1;a<=dr;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.insert({minim,{a,j}});
}
}
void eraseseg(int st,int dr)
{
int mij=(st+dr)/2;
for(int a=st;a<=st+1;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.erase(s.find({minim,{a,j}}));
}
for(int a=mij-1;a<=mij+1;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.erase(s.find({minim,{a,j}}));
}
for(int a=dr-1;a<=dr;a++)
if(a>=st&&a<=dr&&a>=1&&a<=n)
for(int j=1;j<=2;j++)
if(!have[a][j])
{
ll minim=1e18;
for(int k=1;k<=2;k++)
{
if(have[st][k]&&st>0)
minim=min(minim,dist(st,k,a,j));
if(have[dr][k]&&dr<=n)
minim=min(minim,dist(dr,k,a,j));
}
s.erase(s.find({minim,{a,j}}));
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n>>m;
int cur=0;
have[0][1]=have[0][2]=1;
have[n+1][1]=have[n+1][2]=1;
rgt[0]=n+1;
putseg(0,n+1);
poz.insert(0);
poz.insert(n+1);
while(m--)
{
cur++;
char c;
cin>>c;
if(c=='E')
{
/*if(s.empty())
{
cout<<1<<' '<<1<<'\n';
s.insert(1);
have[1][1]=1;
where[cur]={1,1};
continue;
}*/
auto it=s.begin();
int lin=(*it).second.first;
int col=(*it).second.second;
where[cur]={lin,col};
cout<<lin<<' '<<col<<'\n';
if(have[lin][1]+have[lin][2]==0)
{
int st=*prev(poz.lower_bound(lin));
int dr=*poz.upper_bound(lin);
eraseseg(st,dr);
have[lin][col]=1;
putseg(st,lin);
putseg(lin,dr);
poz.insert(lin);
}
else
{
int st=*prev(poz.lower_bound(lin));
int dr=*poz.upper_bound(lin);
eraseseg(st,lin);
eraseseg(lin,dr);
have[lin][col]=1;
putseg(st,lin);
putseg(lin,dr);
}
}
else
{
int p;
cin>>p;
int lin=where[p].first,col=where[p].second;
if(have[lin][1]+have[lin][2]==1)
{
poz.erase(lin);
int st=*prev(poz.lower_bound(lin));
int dr=*poz.upper_bound(lin);
eraseseg(st,lin);
eraseseg(lin,dr);
have[lin][col]=0;
putseg(st,dr);
}
else
{
int st=*prev(poz.lower_bound(lin));
int dr=*poz.upper_bound(lin);
eraseseg(st,lin);
eraseseg(lin,dr);
have[lin][col]=0;
putseg(st,lin);
putseg(lin,dr);
}
}
}
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
7 ms |
852 KB |
Output is correct |
| 2 |
Correct |
6 ms |
396 KB |
Output is correct |
| 3 |
Correct |
9 ms |
596 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
852 KB |
Output is correct |
| 2 |
Correct |
4 ms |
340 KB |
Output is correct |
| 3 |
Correct |
8 ms |
608 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
9 ms |
1876 KB |
Output is correct |
| 2 |
Correct |
6 ms |
340 KB |
Output is correct |
| 3 |
Correct |
7 ms |
1108 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
12 ms |
1876 KB |
Output is correct |
| 2 |
Correct |
4 ms |
340 KB |
Output is correct |
| 3 |
Correct |
7 ms |
1108 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
103 ms |
6568 KB |
Output is correct |
| 2 |
Correct |
80 ms |
1104 KB |
Output is correct |
| 3 |
Correct |
129 ms |
5800 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
236 ms |
24528 KB |
Output is correct |
| 2 |
Correct |
79 ms |
1148 KB |
Output is correct |
| 3 |
Correct |
159 ms |
7908 KB |
Output is correct |
