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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#634621 | #5109. Spider Walk | StayAlone | WA | 531ms | 13924kb | C++14 | 4.6kb | 2024-10-12 17:45:39 | 2024-10-12 17:45:39 |
Judging History
answer
// Problem: P9447 [ICPC2021 WF] Spider Walk
// Contest: Luogu
// URL: https://www.luogu.com.cn/problem/P9447
// Memory Limit: 256 MB
// Time Limit: 6000 ms
//
// Powered by CP Editor (https://cpeditor.org)
#include <bits/stdc++.h>
#define rep1(i, l, r) for (int i = l; i <= int(r); ++i)
#define rep2(i, l, r) for (int i = l; i >= int(r); --i)
#define rer(i, l, r, a) rep1(i, l, r) read(a[i])
#define ptc putchar
#define il inline
#define eb emplace_back
#define ef emplace_front
#define mp make_pair
#define fst first
#define snd second
#define sqr(x) ((x) * (x))
#define ls(x) x << 1
#define rs(x) x << 1 | 1
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
// typedef __int128 bll;
// typedef unsigned __int128 ubll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 2e5 + 10, MAXM = 5e5 + 10;
const int LOGN = log2(MAXN) + 1, inf = ~0U >> 2, INF = ~0U >> 1;
const int dx[] = {0, 0, 1, -1}, dy[] = {1, -1, 0, 0};
namespace stupid_lrc {
template <typename T> il bool read(T &x) {
x = 0; bool f = false; char ch;
while (!isdigit(ch = getchar())) {
f ^= !(ch ^ '-');
if (ch == EOF) return false;
}
while (isdigit(ch)) x = (x << 1) + (x << 3) + (ch & 15), ch = getchar();
if (f) x = ~x + 1; return true;
}
il int read() {int x; read(x); return x;}
template <typename T> il bool read(pair <T, T> &x) {return read(x.fst) && read(x.snd);}
template <typename T> il void gmin(T &x, T y) {x = x < y ? x : y;}
template <typename T> il void gmax(T &x, T y) {x = x > y ? x : y;}
template <typename T, typename ...L>
il bool read(T &x, L &...y) {return read(x) && read(y...);}
template <typename T> il T lowbit(const T &x) {return x & -x;}
}
using namespace stupid_lrc;
int n, m, s; pii a[MAXM];
struct setr {
#define STZ MAXN << 2
int tag1[STZ], tag2[STZ];
il void pushdown(int x, int l, int r) {
int mid = l + r >> 1;
if (~tag1[x]) {
gmin(tag1[ls(x)], tag1[x]);
gmin(tag1[rs(x)], tag1[x] + mid - l + 1);
tag1[x] = -1;
}
if (~tag2[x]) {
gmin(tag2[ls(x)], tag2[x]);
gmin(tag2[rs(x)], tag2[x] - (mid - l + 1));
tag2[x] = -1;
}
}
il void build(int x, int l, int r) {
tag1[x] = tag2[x] = -1;
if (l == r) return tag1[x] = tag2[x] = l == s ? 0 : inf, void();
int mid = l + r >> 1;
build(ls(x), l, mid); build(rs(x), mid + 1, r);
}
il int query(int x, int l, int r, int k) {
if (l == r) return min(tag1[x], tag2[x]);
int mid = l + r >> 1; pushdown(x, l, r);
return k <= mid ? query(ls(x), l, mid, k) : query(rs(x), mid + 1, r, k);
}
il void upd1(int x, int l, int r, int ql, int qr, int &k) {
if (l > qr || r < ql) return;
if (l >= ql && r <= qr) return gmin(tag1[x], k), k += r - l + 1, void();
int mid = l + r >> 1; pushdown(x, l, r);
upd1(ls(x), l, mid, ql, qr, k); upd1(rs(x), mid + 1, r, ql, qr, k);
}
il void upd2(int x, int l, int r, int ql, int qr, int &k) {
if (l > qr || r < ql) return;
if (l >= ql && r <= qr) return gmin(tag2[x], k), k -= r - l + 1, void();
int mid = l + r >> 1; pushdown(x, l, r);
upd2(ls(x), l, mid, ql, qr, k); upd2(rs(x), mid + 1, r, ql, qr, k);
}
il void print(int x, int l, int r) {
if (l == r) return printf("%d\n", min(tag1[x], tag2[x])), void();
int mid = l + r >> 1; pushdown(x, l, r);
print(ls(x), l, mid); print(rs(x), mid + 1, r);
}
il void update(int x, int l, int r, int k, int p) {
if (l == r) return gmin(tag1[x], p), gmin(tag2[x], p);
int mid = l + r >> 1; pushdown(x, l, r);
k <= mid ? update(ls(x), l, mid, k, p) : update(rs(x), mid + 1, r, k, p);
}
il void update2(int x, int l, int r, int k, int p) {
if (l == r) return tag1[x] = tag2[x] = p, void();
int mid = l + r >> 1; pushdown(x, l, r);
k <= mid ? update2(ls(x), l, mid, k, p) : update2(rs(x), mid + 1, r, k, p);
}
} T;
il void change(int x) {
T.update(1, 1, n, x, min(T.query(1, 1, n, x % n + 1), T.query(1, 1, n, x > 1 ? x - 1 : n)) + 1);
}
il void spread(int x) {
int g, f = T.query(1, 1, n, x);
// rep1(i, 1, n) gmin(f[i], f[x] + dis(i, x));
T.upd1(1, 1, n, 1, x - 1, g = f + n - x + 1); T.upd1(1, 1, n, x + 1, n, g = f + 1);
T.upd2(1, 1, n, 1, x - 1, g = f + x - 1); T.upd2(1, 1, n, x + 1, n, g = f + n - 1);
}
int main() {
read(n, m, s); rer(i, 1, m, a);
sort(a + 1, a + 1 + n, greater<>());
T.build(1, 1, n); spread(s);
rep1(i, 1, m) {
int x = a[i].snd, y = x % n + 1, fx = T.query(1, 1, n, x), fy = T.query(1, 1, n, y);
T.update2(1, 1, n, y, fx); T.update2(1, 1, n, x, fy);
change(x); change(y); spread(x); spread(y);
} T.print(1, 1, n);
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 531ms
memory: 13924kb
input:
200000 500000 116205 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50...
output:
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...
result:
wrong answer 2nd lines differ - expected: '1', found: '2'