QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #728632 | #4580. Bicycle Tour | MeatInTheMiddle# | WA | 734ms | 22520kb | C++17 | 9.7kb | 2024-11-09 15:33:11 | 2024-11-09 15:33:12 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define fastio (ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL))
typedef long long ll;
typedef long double lld;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
const int MAXSIZE = 101010;
const long long INF = 2e9 + 5;
const double EPSILON = 1e-14;
const ll DIV = 2000003;
const long double pi = 3.14159265358979323846264338327950288419716939937510L;
struct MaxSeg
{
struct node
{
ll v, lz;
};
vector<node> tr;
vector<ll> a;
int n;
void rst(int sz) { n = sz, tr.resize(sz << 2, {0, 0}), a.resize(sz + 1, 0); }
ll init(int nd, int s, int e)
{
if (s == e)
return tr[nd].v = 0;
int m = (s + e) >> 1;
return tr[nd].v = max(init(nd << 1, s, m), init(nd << 1 | 1, m + 1, e));
}
void prp(int nd, int s, int e)
{
if (tr[nd].lz != 0)
{
tr[nd].v = max(tr[nd].v, tr[nd].lz);
if (s != e)
{
tr[nd << 1].lz = max(tr[nd << 1].lz, tr[nd].lz);
tr[nd << 1 | 1].lz = max(tr[nd << 1 | 1].lz, tr[nd].lz);
}
tr[nd].lz = 0;
}
}
void upd(int nd, int s, int e, int l, int r, ll d)
{
prp(nd, s, e);
if (r < s || e < l)
return;
if (l <= s && e <= r)
{
tr[nd].lz = max(tr[nd].lz, d);
prp(nd, s, e);
return;
}
int m = (s + e) >> 1;
upd(nd << 1, s, m, l, r, d);
upd(nd << 1 | 1, m + 1, e, l, r, d);
tr[nd].v = max(tr[nd << 1].v, tr[nd << 1 | 1].v);
}
void upd(int l, int r, ll d)
{
upd(1, 1, n, l, r, d);
}
ll qry(int nd, int s, int e, int l, int r)
{
prp(nd, s, e);
if (r < s || e < l)
return 0;
if (l <= s && e <= r)
{
return tr[nd].v;
}
int m = (s + e) >> 1;
return max(qry(nd << 1, s, m, l, r),
qry(nd << 1 | 1, m + 1, e, l, r));
}
ll qry(int l, int r)
{
return qry(1, 1, n, l, r);
}
};
struct MinSeg
{
struct node
{
ll v, lz;
};
vector<node> tr;
vector<ll> a;
int n;
void rst(int sz) { n = sz, tr.resize(sz << 2, {INF, INF}), a.resize(sz + 1, 0); }
ll init(int nd, int s, int e)
{
if (s == e)
return tr[nd].v = INF;
int m = (s + e) >> 1;
return tr[nd].v = min(init(nd << 1, s, m), init(nd << 1 | 1, m + 1, e));
}
void prp(int nd, int s, int e)
{
if (tr[nd].lz != INF)
{
tr[nd].v = min(tr[nd].v, tr[nd].lz);
if (s != e)
{
tr[nd << 1].lz = min(tr[nd << 1].lz, tr[nd].lz);
tr[nd << 1 | 1].lz = min(tr[nd << 1 | 1].lz, tr[nd].lz);
}
tr[nd].lz = INF;
}
}
void upd(int nd, int s, int e, int l, int r, ll d)
{
prp(nd, s, e);
if (r < s || e < l)
return;
if (l <= s && e <= r)
{
tr[nd].lz = min(tr[nd].lz, d);
prp(nd, s, e);
return;
}
int m = (s + e) >> 1;
upd(nd << 1, s, m, l, r, d);
upd(nd << 1 | 1, m + 1, e, l, r, d);
tr[nd].v = min(tr[nd << 1].v, tr[nd << 1 | 1].v);
}
void upd(int l, int r, ll d)
{
upd(1, 1, n, l, r, d);
}
ll qry(int nd, int s, int e, int l, int r)
{
prp(nd, s, e);
if (r < s || e < l)
return INF;
if (l <= s && e <= r)
{
return tr[nd].v;
}
int m = (s + e) >> 1;
return min(qry(nd << 1, s, m, l, r),
qry(nd << 1 | 1, m + 1, e, l, r));
}
ll qry(int l, int r)
{
return qry(1, 1, n, l, r);
}
};
class HLD1
{
public:
int sz[MAXSIZE] = {0}, dep[MAXSIZE] = {0}, par[MAXSIZE] = {0}, top[MAXSIZE] = {0}, in[MAXSIZE] = {0}, out[MAXSIZE] = {0};
vector<int> g[MAXSIZE];
vector<int> inp[MAXSIZE];
MaxSeg seg;
int chk[MAXSIZE] = {0};
void dfs(int v = 1)
{
chk[v] = 1;
for (auto i : inp[v])
{
if (chk[i])
continue;
chk[i] = 1;
g[v].push_back(i);
dfs(i);
}
}
void dfs1(int v = 1)
{
sz[v] = 1;
for (auto &i : g[v])
{
dep[i] = dep[v] + 1;
par[i] = v;
dfs1(i);
sz[v] += sz[i];
if (sz[i] > sz[g[v][0]])
swap(i, g[v][0]);
}
}
int pv = 0;
void dfs2(int v = 1)
{
in[v] = ++pv;
for (auto i : g[v])
{
top[i] = i == g[v][0] ? top[v] : i;
dfs2(i);
}
out[v] = pv;
}
void update(int a, int b, int w)
{
while (top[a] ^ top[b])
{
if (dep[top[a]] < dep[top[b]])
swap(a, b);
int st = top[a];
seg.upd(in[st], in[a], w);
a = par[st];
}
if (dep[a] > dep[b])
swap(a, b);
seg.upd(in[a] + 1, in[b], w);
}
ll query(int a, int b)
{
ll ret = 0;
while (top[a] ^ top[b])
{
if (dep[top[a]] < dep[top[b]])
swap(a, b);
int st = top[a];
ret = max(ret, seg.qry(in[st], in[a]));
a = par[st];
}
if (dep[a] > dep[b])
swap(a, b);
ret = max(ret, seg.qry(in[a] + 1, in[b]));
return ret;
}
};
class HLD2
{
public:
int sz[MAXSIZE] = {0}, dep[MAXSIZE] = {0}, par[MAXSIZE] = {0}, top[MAXSIZE] = {0}, in[MAXSIZE] = {0}, out[MAXSIZE] = {0};
vector<int> g[MAXSIZE];
vector<int> inp[MAXSIZE];
MinSeg seg;
int chk[MAXSIZE] = {0};
void dfs(int v = 1)
{
chk[v] = 1;
for (auto i : inp[v])
{
if (chk[i])
continue;
chk[i] = 1;
g[v].push_back(i);
dfs(i);
}
}
void dfs1(int v = 1)
{
sz[v] = 1;
for (auto &i : g[v])
{
dep[i] = dep[v] + 1;
par[i] = v;
dfs1(i);
sz[v] += sz[i];
if (sz[i] > sz[g[v][0]])
swap(i, g[v][0]);
}
}
int pv = 0;
void dfs2(int v = 1)
{
in[v] = ++pv;
for (auto i : g[v])
{
top[i] = i == g[v][0] ? top[v] : i;
dfs2(i);
}
out[v] = pv;
}
void update(int a, int b, int w)
{
while (top[a] ^ top[b])
{
if (dep[top[a]] < dep[top[b]])
swap(a, b);
int st = top[a];
seg.upd(in[st], in[a], w);
a = par[st];
}
if (dep[a] > dep[b])
swap(a, b);
seg.upd(in[a], in[b], w);
}
ll query(int a, int b)
{
ll ret = INF;
while (top[a] ^ top[b])
{
if (dep[top[a]] < dep[top[b]])
swap(a, b);
int st = top[a];
ret = min(ret, seg.qry(in[st], in[a]));
a = par[st];
}
if (dep[a] > dep[b])
swap(a, b);
ret = min(ret, seg.qry(in[a], in[b]));
return ret;
}
};
int n, m;
int arr[101010];
vector<array<int, 3>> edg;
int us[101010];
int prt[101001];
int ans[101011];
int find(int x)
{
if (prt[x] == 0 || prt[x] == x)
return prt[x] = x;
return prt[x] = find(prt[x]);
}
void mrg(int a, int b)
{
prt[find(a)] = find(b);
}
int main()
{
fastio;
cin >> n >> m;
for (int i = 0; i < n; i++)
{
cin >> arr[i + 1];
}
for (int i = 0; i < m; i++)
{
int a, b;
cin >> a >> b;
edg.push_back({abs(arr[a] - arr[b]), a, b});
}
fill(ans, ans + n + 5, INF);
sort(edg.begin(), edg.end());
for (int y = 0; y < 3; y++)
{
HLD1 hld1;
HLD2 hld2;
memset(us, 0, sizeof us);
memset(prt, 0, sizeof prt);
hld2.seg.rst(n + 5); // ans
hld1.seg.rst(n + 5); //
for (int i = 0; i < m; i++)
{
int d = edg[i][0], a = edg[i][1], b = edg[i][2];
if (find(a) == find(b))
continue;
mrg(a, b);
us[i] = 1;
hld1.inp[a].push_back(b);
hld1.inp[b].push_back(a);
hld2.inp[a].push_back(b);
hld2.inp[b].push_back(a);
}
hld1.dfs();
hld1.dfs1();
hld1.dfs2();
hld2.dfs();
hld2.dfs1();
hld2.dfs2();
for (int i = 0; i < m; i++)
{
if (us[i])
{
int d = edg[i][0], a = edg[i][1], b = edg[i][2];
hld1.update(a, b, d);
}
}
for (int i = 0; i < m; i++)
{
if (!us[i])
{
int d = edg[i][0], a = edg[i][1], b = edg[i][2];
int mx = hld1.query(a, b);
hld2.update(a, b, max(d, mx));
}
}
for (int i = 1; i <= n; i++)
{
int t = hld2.query(i, i);
ans[i] = min(ans[i], t);
}
random_shuffle(edg.begin(), edg.end());
}
for (int i = 1; i <= n; i++)
{
if (ans[i] == INF)
cout << -1 << " ";
else
cout << ans[i] << " ";
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 4ms
memory: 19404kb
input:
8 11 5 2 7 0 10 6 6 6 1 2 1 3 2 3 2 4 2 5 2 7 3 5 1 6 6 7 6 8 7 8
output:
4 4 5 -1 8 0 0 0
result:
ok single line: '4 4 5 -1 8 0 0 0 '
Test #2:
score: 0
Accepted
time: 8ms
memory: 19652kb
input:
4 5 10 20 30 40 1 2 1 3 1 4 2 3 3 4
output:
20 20 20 30
result:
ok single line: '20 20 20 30 '
Test #3:
score: 0
Accepted
time: 7ms
memory: 19376kb
input:
5 4 72 35 22 49 108 1 2 2 3 3 4 4 5
output:
-1 -1 -1 -1 -1
result:
ok single line: '-1 -1 -1 -1 -1 '
Test #4:
score: 0
Accepted
time: 4ms
memory: 19628kb
input:
2 1 10 20 1 2
output:
-1 -1
result:
ok single line: '-1 -1 '
Test #5:
score: 0
Accepted
time: 54ms
memory: 19576kb
input:
252 31626 825 5234 3578 4723 2145 4362 1861 2413 7203 1939 3210 7153 2155 4559 4403 1466 887 3786 6529 719 4272 3287 5703 6708 2390 4987 4214 770 3487 6230 3498 6255 4963 1093 3065 2961 1663 4857 3224 4284 4228 106 1614 1010 145 1557 4510 1032 4632 155 5570 154 884 1204 2876 6163 5023 4593 7261 3729...
output:
55 33 46 34 10 33 34 30 22 33 33 46 10 34 26 100 14 62 17 9 13 35 81 45 23 29 23 20 11 32 11 32 29 38 18 13 14 0 28 13 11 42 35 22 9 57 22 22 35 7 52 7 14 45 72 92 14 8 15 62 10 20 21 34 66 9 20 24 29 6 30 16 26 9 6 27 8 40 85 17 12 26 29 17 10 61 35 9 39 15 14 14 31 22 63 66 110 24 16 7 30 22 15 18...
result:
ok single line: '55 33 46 34 10 33 34 30 22 33 ...5 15 71 10 52 18 16 30 10 34 4 '
Test #6:
score: 0
Accepted
time: 8ms
memory: 19676kb
input:
30 435 268435456 1024 67108864 16777216 134217728 131072 524288 512 256 8 32 64 33554432 2097152 128 2048 16384 8192 4096 8388608 65536 536870912 4 2 16 1048576 32768 1 262144 4194304 24 28 23 28 10 28 25 28 11 28 12 28 15 28 9 28 8 28 2 28 16 28 19 28 18 28 17 28 27 28 21 28 6 28 28 29 7 28 26 28 1...
output:
201326592 768 50331648 12582912 100663296 98304 393216 384 192 6 24 48 25165824 1572864 96 1536 12288 6144 3072 6291456 49152 402653184 3 3 12 786432 24576 3 196608 3145728
result:
ok single line: '201326592 768 50331648 1258291... 786432 24576 3 196608 3145728 '
Test #7:
score: 0
Accepted
time: 182ms
memory: 20236kb
input:
430 92235 268435456 64 536870912 256 128 134217728 2 64 33554432 524288 1048576 268435456 1048576 512 32 32 8192 8192 8192 268435456 256 1024 16384 8 2097152 1 4 65536 268435456 32768 2048 512 128 32768 268435456 8192 4194304 16384 1024 4194304 128 33554432 67108864 1 512 16 128 16384 536870912 4 16...
output:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ...
result:
ok single line: '0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ... 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 '
Test #8:
score: -100
Wrong Answer
time: 734ms
memory: 22520kb
input:
4815 185773 999998072 999997632 999995973 999998063 999999530 999999125 999999430 999998145 999999596 999997846 999999214 999998642 999997013 999995796 999999311 999996273 999996607 999996332 999995768 999996225 999996086 999996362 999997090 999997081 999998960 999996645 999996842 999998514 99999527...
output:
1662 1649 1662 1661 1662 1660 1662 1662 1662 1662 1662 1662 1662 1658 1660 1662 1661 1662 1662 1662 1660 1657 1661 1662 1662 1661 1662 1659 1661 1627 1662 1662 1662 1662 1662 1662 1662 1660 1661 1662 1661 1662 1662 1661 1661 1661 1660 1662 1661 1662 1659 1662 1662 1662 1662 1662 1662 1658 1662 1662 ...
result:
wrong answer 1st lines differ - expected: '66 57 91 47 76 25 193 80 42 12... 173 79 85 50 80 71 47 22 56 49', found: '1662 1649 1662 1661 1662 1660 ... 1662 1659 1662 1658 1662 1662 '