QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#89444 | #5251. Constellations | tom0727 | WA | 2409ms | 91600kb | C++14 | 7.0kb | 2023-03-20 07:50:05 | 2023-03-20 07:50:09 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#if __cplusplus >= 201103L
struct pairhash {
static uint64_t splitmix64(uint64_t x) {
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
template<class T, class U>
size_t operator() (const pair<T,U> &p) const {
static const uint64_t FIXED_RANDOM = (uint64_t)chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(p.first + FIXED_RANDOM) ^ splitmix64(p.second+ FIXED_RANDOM);
}
};
struct custom_hash {
static uint64_t splitmix64(uint64_t x) {
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = (uint64_t)chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
inline int randint(int l, int r) {
return uniform_int_distribution<int>(l,r)(rng);
}
inline double randdouble(double l, double r) {
return uniform_real_distribution<double>(l,r)(rng);
}
#endif
#ifndef ONLINE_JUDGE
# define LOG(x) (cerr << #x << " = " << (x) << endl)
#else
# define LOG(x) 0
#endif
#define fastio ios::sync_with_stdio(false); cin.tie(0);
#define ll long long
#define ull unsigned long long
#define ll128 __int128_t
#define PI 3.14159265358979323846
#define abs(a) ((a>0)?a:-(a))
#define pii pair<int,int>
#define pll pair<ll,ll>
const long double pi = acos(-1.0);
const long double eps = (double)1e-8;
const int mod = 998244353;
template<class T>
T qpow(T a, int b) {
T res = 1;
while (b) {
if (b & 1) res *= a;
a *= a;
b >>= 1;
}
return res;
}
int norm(int x) {
if (x < 0) {
x += mod;
}
if (x >= mod) {
x -= mod;
}
return x;
}
struct Z {
int x;
Z(int x = 0) : x(norm(x)) {}
Z(ll x) : x(norm((int)(x % mod))) {}
int val() const {
return x;
}
Z operator-() const {
return Z(norm(mod - x));
}
Z inv() const {
assert(x != 0);
return qpow(*this, mod - 2);
}
Z &operator*=(const Z &rhs) {
x = (ll)(x) * rhs.x % mod;
return *this;
}
Z &operator+=(const Z &rhs) {
x = norm(x + rhs.x);
return *this;
}
Z &operator-=(const Z &rhs) {
x = norm(x - rhs.x);
return *this;
}
Z &operator/=(const Z &rhs) {
return *this *= rhs.inv();
}
friend Z operator*(const Z &lhs, const Z &rhs) {
Z res = lhs;
res *= rhs;
return res;
}
friend Z operator+(const Z &lhs, const Z &rhs) {
Z res = lhs;
res += rhs;
return res;
}
friend Z operator-(const Z &lhs, const Z &rhs) {
Z res = lhs;
res -= rhs;
return res;
}
friend Z operator/(const Z &lhs, const Z &rhs) {
Z res = lhs;
res /= rhs;
return res;
}
friend std::istream &operator>>(std::istream &is, Z &a) {
ll v;
is >> v;
a = Z(v);
return is;
}
friend std::ostream &operator<<(std::ostream &os, const Z &a) {
return os << a.val();
}
};
const int maxn = 2e3+5;
const int maxm = (500*500+105) * 2;
int par[maxn], sz[maxn];
int finds(int u) {
if (par[u] == u) return u;
return par[u] = finds(par[u]);
}
int id;
int age[maxn];
ll dis[maxn][maxn];
ll getdis(int a, int b) {
return dis[min(a,b)][max(a,b)];
}
struct Node {
ll d;
int a, b;
bool operator<(const Node& other) const {
int pa = finds(a), pb = finds(b);
int na = finds(other.a), nb = finds(other.b);
ll d1 = d * sz[na] * sz[nb], d2 = other.d * sz[pa] * sz[pb];
if (d1 == d2) {
return (pii){min(age[pa], age[pb]), max(age[pa], age[pb])} > (pii){min(age[na], age[nb]), max(age[na], age[nb])};
}
return d1 > d2;
}
};
int n, x[maxn], y[maxn];
priority_queue<Node> pq;
void clearall(int u) {
sz[u] = 0;
for (int v = u+1; v <= n; v++) dis[u][v] = 0;
}
bool unions(int u, int v) {
u = finds(u), v = finds(v);
if (u == v) return 0;
if (sz[u] > sz[v]) {
par[v] = u;
sz[u] += sz[v];
sz[v] = 0;
// clearall(v);
} else {
par[u] = v;
sz[v] += sz[u];
sz[u] = 0;
// clearall(u);
}
return 1;
}
inline ll sq(int x) {return x*x;}
ll cal(int i, int j) {
return sq(x[i] - x[j]) + sq(y[i] - y[j]);
}
void printpq() {
priority_queue<Node> tmp = pq;
printf("pq = {");
while (tmp.size()) {
printf("(%d,%d),",tmp.top().a, tmp.top().b);
tmp.pop();
}
printf("}\n");
}
int main() {
cin >> n;
for (int i = 1; i <= n; i++) par[i] = i, sz[i] = 1, cin >> x[i] >> y[i], age[i] = ++id;
for (int i = 1; i <= n; i++) {
for (int j = i+1; j <= n; j++) {
dis[i][j] = cal(i,j);
pq.push({cal(i,j), i, j});
}
}
int cnt = 0;
while (cnt < n-1) {
Node nd = pq.top(); pq.pop();
if (finds(nd.a) == finds(nd.b)) continue;
if (nd.a != finds(nd.a) || nd.b != finds(nd.b)) continue;
if (getdis(nd.a,nd.b) != nd.d) continue;
int a = nd.a, b = nd.b;
// printf("a = %d, b = %d\n",finds(a),finds(b));
// a = finds(a), b = finds(b);
// LOG(getdis(1, 3));
// LOG(getdis(2, 3));
// LOG(getdis(3, 4));
unions(a, b);
age[finds(a)] = ++id;
for (int c = 1; c <= n; c++) {
if (finds(c) == finds(a) || finds(c) == finds(b) || c != finds(c)) continue;
int pc = finds(c);
// printf("a = %d, b = %d, pc = %d, getdis(a,pc) = %lld, getdis(b,pc) = %lld\n",a,b,pc,getdis(a,pc),getdis(b,pc));
int pa = finds(a);
dis[min(pa, pc)][max(pa, pc)] = getdis(a, pc) + getdis(b, pc);
// LOG(pc);
// LOG(dis[min(a, pc)][max(a, pc)]);
// LOG(getdis(a, pc));
// dis[min(a, pc)][max(a, pc)] + dis[min(b, pc)][max(b, pc)];
// dis[min(b, pc)][max(b, pc)] = getdis(a, pc);
// pq.push({dis[min(a, pc)][max(a, pc)], a, pc});
}
for (int c = 1; c <= n; c++) {
int pc = finds(c), pa = finds(a);
if (pc == finds(a) || pc == finds(b) || c != pc) continue;
pq.push({getdis(pa, pc), min(pa, pc), max(pa, pc)});
// LOG(pc);
}
cout << sz[finds(a)] << endl;
// LOG(getdis(2, 3));
// LOG(getdis(3, 4));
cnt++;
// printpq();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3380kb
input:
2 0 0 1 0
output:
2
result:
ok single line: '2'
Test #2:
score: 0
Accepted
time: 2144ms
memory: 91508kb
input:
2000 1000 -1000 1000 -999 1000 -998 1000 -997 1000 -996 1000 -995 1000 -994 1000 -993 1000 -992 1000 -991 1000 -990 1000 -989 1000 -988 1000 -987 1000 -986 1000 -985 1000 -984 1000 -983 1000 -982 1000 -981 1000 -980 1000 -979 1000 -978 1000 -977 1000 -976 1000 -975 1000 -974 1000 -973 1000 -972 1000...
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:
ok 1999 lines
Test #3:
score: 0
Accepted
time: 2093ms
memory: 91488kb
input:
2000 -1000 1000 -999 1000 -998 1000 -997 1000 -996 1000 -995 1000 -994 1000 -993 1000 -992 1000 -991 1000 -990 1000 -989 1000 -988 1000 -987 1000 -986 1000 -985 1000 -984 1000 -983 1000 -982 1000 -981 1000 -980 1000 -979 1000 -978 1000 -977 1000 -976 1000 -975 1000 -974 1000 -973 1000 -972 1000 -971...
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:
ok 1999 lines
Test #4:
score: 0
Accepted
time: 2091ms
memory: 91560kb
input:
2000 -1000 -1000 -999 -1000 -998 -1000 -997 -1000 -996 -1000 -995 -1000 -994 -1000 -993 -1000 -992 -1000 -991 -1000 -990 -1000 -989 -1000 -988 -1000 -987 -1000 -986 -1000 -985 -1000 -984 -1000 -983 -1000 -982 -1000 -981 -1000 -980 -1000 -979 -1000 -978 -1000 -977 -1000 -976 -1000 -975 -1000 -974 -10...
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:
ok 1999 lines
Test #5:
score: 0
Accepted
time: 2175ms
memory: 91496kb
input:
2000 -1000 -1000 -1000 -999 -1000 -998 -1000 -997 -1000 -996 -1000 -995 -1000 -994 -1000 -993 -1000 -992 -1000 -991 -1000 -990 -1000 -989 -1000 -988 -1000 -987 -1000 -986 -1000 -985 -1000 -984 -1000 -983 -1000 -982 -1000 -981 -1000 -980 -1000 -979 -1000 -978 -1000 -977 -1000 -976 -1000 -975 -1000 -9...
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:
ok 1999 lines
Test #6:
score: 0
Accepted
time: 1936ms
memory: 91576kb
input:
2000 1000 -250 1000 -249 1000 -248 1000 -247 1000 -246 1000 -245 1000 -244 1000 -243 1000 -242 1000 -241 1000 -240 1000 -239 1000 -238 1000 -237 1000 -236 1000 -235 1000 -234 1000 -233 1000 -232 1000 -231 1000 -230 1000 -229 1000 -228 1000 -227 1000 -226 1000 -225 1000 -224 1000 -223 1000 -222 1000 ...
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:
ok 1999 lines
Test #7:
score: 0
Accepted
time: 2103ms
memory: 91560kb
input:
2000 0 -1000 0 -999 0 -998 0 -997 0 -996 0 -995 0 -994 0 -993 0 -992 0 -991 0 -990 0 -989 0 -988 0 -987 0 -986 0 -985 0 -984 0 -983 0 -982 0 -981 0 -980 0 -979 0 -978 0 -977 0 -976 0 -975 0 -974 0 -973 0 -972 0 -971 0 -970 0 -969 0 -968 0 -967 0 -966 0 -965 0 -964 0 -963 0 -962 0 -961 0 -960 0 -959 ...
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:
ok 1999 lines
Test #8:
score: -100
Wrong Answer
time: 2409ms
memory: 91600kb
input:
2000 -400 571 -725 636 -880 529 -657 372 -383 382 -746 888 -604 785 -497 557 -677 977 -562 917 -530 623 -636 535 -816 579 -633 428 -573 561 -496 479 -409 448 -570 379 -421 795 -827 865 -730 809 -423 984 -676 772 -398 816 -451 373 -756 777 -351 829 -954 345 -543 871 -595 521 -501 734 -378 769 -987 60...
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 3 2 2 2 2 2 2 2 2 3 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 3 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 ...
result:
wrong answer 217th lines differ - expected: '3', found: '2'