Submission #1694470
Source Code Expand
#include <iostream>
#include <vector>
#include <string.h>
#include <stack>
#include <queue>
#include <algorithm>
#include <climits>
#include <cmath>
#include <map>
#include <set>
#include <assert.h>
#include <sstream>
#define REP(i,n) for(ll i=0;i<(n);i++)
#define MOD 1000000007
#define int long long
#ifdef int
const long long INF = LLONG_MAX / 10;
#else
const int INF = 1010101010;
#endif
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
typedef pair<int, int> P;
//typedef pair<double, double> P;
template <class T> inline void smin(T &a, T const &b) { a = min(a, b); }
template <class T> inline void smax(T &a, T const &b) { a = max(a, b); }
#ifdef LOCAL
#define dump(...) \
do { \
std::ostringstream os; \
os << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; \
print_to(os, ", ", "\n", __VA_ARGS__); \
std::cerr << os.str(); \
} while (0)
#define dump_(a) \
do { \
std::ostringstream os; \
os << __LINE__ << ":\t" << #a << " = ["; \
print_to_(os, ", ", "]\n", all(a)); \
std::cerr << os.str(); \
} while (0)
#else
#define dump(...)
#define dump_(...)
#endif
template <typename T>
void print_to(std::ostream &os, const char *, const char *tail, const T &fst) {
os << fst << tail;
}
template <typename Fst, typename... Rst>
void print_to(std::ostream &os, const char *del, const char *tail, const Fst &fst, const Rst &... rst) {
os << fst << del;
print_to(os, del, tail, rst...);
}
template <typename Iter>
void print_to_(std::ostream &os, const char *del, const char *tail, Iter bgn, Iter end) {
for (Iter it = bgn; it != end;) {
os << *it;
if (++it != end) {
os << del;
} else {
os << tail;
}
}
}
template <typename Fst, typename... Rst>
void println(const Fst &fst, const Rst &... rst) {
print_to(std::cout, "\n", "\n", fst, rst...);
}
template <typename Fst, typename... Rst>
void print(const Fst &fst, const Rst &... rst) {
print_to(std::cout, " ", "\n", fst, rst...);
}
template <typename Iter>
void println_(Iter bgn, Iter end) {
print_to_(std::cout, "\n", "\n", bgn, end);
}
template <typename Iter>
void print_(Iter bgn, Iter end) {
print_to_(std::cout, " ", "\n", bgn, end);
}
// const int MOD = 1000000007;
namespace trush {
int _ = (std::cout.precision(10), std::cout.setf(std::ios::fixed), std::cin.tie(0),
std::ios::sync_with_stdio(0), 0);
}
//UnionFind!!!
class UnionFind
{
private:
vector<int> par;
vector<int> myRank;
vector<int> cnt;
public:
//n要素で初期化
UnionFind(int n)
{
par.resize(n);
myRank.resize(n);
cnt.resize(n);
REP(i,n) {
par[i] = i;
myRank[i] = 0;
cnt[i] = 1;
}
}
//木の根を求める
int find(int x)
{
if (par[x] == x) return x;
else return par[x] = find(par[x]);
}
//xとyの属する集合を併合
void unite(int x, int y)
{
x = find(x);
y = find(y);
if (x == y) return;
if (myRank[x] < myRank[y]) {
par[x] = y;
cnt[y] += cnt[x];
} else {
par[y] = x;
cnt[x] += cnt[y];
if (myRank[x] == myRank[y]) myRank[x]++;
}
}
//xとyが同じ集合に属するか否か
bool same(int x, int y)
{
return find(x) == find(y);
}
//xが含まれる集合の要素数
int count(int x)
{
return cnt[find(x)];
}
};
int N, M;
int K, L;
signed main()
{
cin >> N >> M;
UnionFind uf(N + M);
REP(i,N) {
cin >> K;
REP(j,K) {
cin >> L;
L--;
uf.unite(i, N + L);
}
}
for (int i=1; i<N; i++) {
if (!uf.same(0, i)) {
cout << "NO" << endl;
return 0;
}
}
cout << "YES" << endl;
}
Submission Info
Submission Time |
|
Task |
C - Interpretation |
User |
hiyokko2 |
Language |
C++14 (GCC 5.4.1) |
Score |
400 |
Code Size |
4453 Byte |
Status |
AC |
Exec Time |
18 ms |
Memory |
4992 KB |
Judge Result
Set Name |
sample |
dataset1 |
dataset2 |
Score / Max Score |
0 / 0 |
200 / 200 |
200 / 200 |
Status |
|
|
|
Set Name |
Test Cases |
sample |
sample-01.txt, sample-02.txt |
dataset1 |
sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt |
dataset2 |
sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt, sample-01.txt, sample-02.txt |
Case Name |
Status |
Exec Time |
Memory |
01-01.txt |
AC |
1 ms |
256 KB |
01-02.txt |
AC |
1 ms |
256 KB |
01-03.txt |
AC |
1 ms |
256 KB |
01-04.txt |
AC |
1 ms |
256 KB |
01-05.txt |
AC |
1 ms |
256 KB |
01-06.txt |
AC |
1 ms |
256 KB |
01-07.txt |
AC |
1 ms |
256 KB |
01-08.txt |
AC |
1 ms |
256 KB |
01-09.txt |
AC |
1 ms |
256 KB |
01-10.txt |
AC |
1 ms |
256 KB |
02-01.txt |
AC |
13 ms |
2688 KB |
02-02.txt |
AC |
14 ms |
2560 KB |
02-03.txt |
AC |
12 ms |
1664 KB |
02-04.txt |
AC |
18 ms |
3968 KB |
02-05.txt |
AC |
15 ms |
2432 KB |
02-06.txt |
AC |
18 ms |
3968 KB |
02-07.txt |
AC |
16 ms |
2560 KB |
02-08.txt |
AC |
13 ms |
2560 KB |
02-09.txt |
AC |
17 ms |
4992 KB |
02-10.txt |
AC |
13 ms |
2560 KB |
02-11.txt |
AC |
13 ms |
2560 KB |
02-12.txt |
AC |
14 ms |
2560 KB |
02-13.txt |
AC |
14 ms |
2560 KB |
sample-01.txt |
AC |
1 ms |
256 KB |
sample-02.txt |
AC |
1 ms |
256 KB |