#include <bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define vll vector<ll>
#define vii vector<pair<int, int>>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define loop(_) for (int __ = 0; __ < (_); ++__)
#define pb push_back
#define f first
#define s second
#define sz(_) ((int)_.size())
#define all(_) _.begin(), _.end()
#define lb lower_bound
#define ub upper_bound
using ll = long long;
using ld = long double;
const int N = 1e5 + 7;
const ll mod = 1e9 + 7;
int n, m;
int vis[N][2];
int xs[N], ys[N];
multiset<int> mul;
struct cmp
{
bool operator()(pii x, pii y)
{
return x.s - x.f != y.s - y.f ? x.s - x.f > y.s - y.f : x.f < y.f;
}
};
set<pii, cmp> st;
set<pii> rst;
int calc(int x, int y)
{
int ret = 1e9;
if (mul.empty())
return ret;
auto eval = [&](int u) -> void {
for (int i = 0; i < 2; ++i)
{
if (vis[u][i])
{
ret = min(ret, (u - x) * (u - x) + (i - y) * (i - y));
}
}
};
auto it = mul.lb(x);
if (it != mul.end())
eval(*it);
if (it != mul.begin())
eval(*(--it));
return ret;
}
void Insert(int x, int y)
{
st.insert({x, y});
rst.insert({x, y});
}
void Erase(int x, int y)
{
st.erase({x, y});
rst.erase({x, y});
}
void recalc()
{
rst.clear(), st.clear();
int lst = -1;
for (int j = 0; j < n; ++j)
{
if (vis[j][0] || vis[j][1])
{
if (lst + 1 <= j - 1)
Insert(lst + 1, j - 1);
lst = j;
}
}
if (lst + 1 < n)
Insert(lst + 1, n - 1);
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
#ifndef ONLINE_JUDGE
#endif
cin >> n >> m;
Insert(0, n - 1);
for (int i = 0; i < m; ++i)
{
char c;
cin >> c;
if (c == 'E')
{
int Min = 0;
int wx = 0, wy = 0;
if (sz(mul) >= 2)
{
for (auto u : st)
{
int x = u.f, y = u.s;
int mid = (x + y) >> 1;
for (int j = x; j <= y; ++j)
for (int i = 0; i < 2; ++i)
{
if (j < x || j > y || vis[j][i])
continue;
int w = calc(j, i);
if (w > Min)
{
Min = w;
wx = j, wy = i;
}
}
}
if (Min <= 3 || 1)
{
Min = 0;
for (int a = 0; a < n; ++a)
{
for (int b = 0; b < 2; ++b)
{
int rv = calc(a, b);
if (rv > Min || (rv == Min && make_pair(a, b) < make_pair(wx, wy)))
{
wx = a, wy = b;
Min = rv;
}
}
}
}
}
else if (!sz(mul))
;
else
{
// wx = sz(mul) - n;
// wy = calc(wx, 1) > calc(wx, 0);
if (1)
{
Min = 0;
for (int a = 0; a < n; ++a)
{
for (int b = 0; b < 2; ++b)
{
int rv = calc(a, b);
if (rv > Min || (rv == Min && make_pair(a, b) < make_pair(wx, wy)))
{
wx = a, wy = b;
Min = rv;
}
}
}
}
}
// else if (sz(mul) == 1)
// wx = n - 1, wy = 1;
xs[i] = wx, ys[i] = wy;
vis[wx][wy] = 1;
recalc();
// for (auto u : st)
// {
// if (wx >= u.f && wx <= u.s)
// {
// int x = u.f, y = u.s;
// Erase(x, y);
// if (x <= wx - 1)
// Insert(x, wx - 1);
// if (wx + 1 <= y)
// Insert(wx + 1, y);
// break;
// }
// }
mul.insert(wx);
cout << ++wx << " " << ++wy << "\n";
}
else
{
int p;
cin >> p;
--p;
mul.erase(mul.find(xs[p]));
vis[xs[p]][ys[p]] = 0;
recalc();
continue;
if (vis[xs[p]][0] == vis[xs[p]][1])
{
auto it = rst.lb({xs[p], -1});
int nxt = (it != rst.end() ? (*it).s : n - 1);
if (it != rst.end())
Erase((*it).f, (*it).s);
int prv = xs[p];
if (it != rst.begin())
{
prv = (*--it).f;
Erase((*it).f, (*it).s);
}
Insert(prv, nxt);
}
}
}
return 0;
}
/*
01:*
02: #
03:
04:*
05:
06:
07:*
08:
09:
10: #
*/
Compilation message
tram.cpp: In function 'int main()':
tram.cpp:113:40: warning: unused variable 'mid' [-Wunused-variable]
113 | int mid = (x + y) >> 1;
| ^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
459 ms |
492 KB |
Output is correct |
| 2 |
Correct |
12 ms |
364 KB |
Output is correct |
| 3 |
Correct |
227 ms |
520 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
460 ms |
876 KB |
Output is correct |
| 2 |
Correct |
12 ms |
364 KB |
Output is correct |
| 3 |
Correct |
226 ms |
492 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
35 ms |
1004 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
37 ms |
1004 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
1088 ms |
1004 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
34 ms |
1004 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
