Submission #4540522


Source Code Expand

#include <bits/stdc++.h>
#define rep(i, n) for (rint i = 1; i <= (n); i ++)
#define re0(i, n) for (rint i = 0; i < (int) n; i ++)
#define travel(i, u) for (rint i = head[u]; i; i = e[i].nxt)
#define rint register int
using namespace std;

typedef long long lo;

template<typename tp> inline void read(tp &x) {
    x = 0; char c = getchar(); int f = 0;
    for (; c < '0' || c > '9'; f |= c == '-', c = getchar());
    for (; c >= '0' && c <= '9'; x = (x << 3) + (x << 1) + c - '0', c = getchar());
    if (f) x = -x;
}
const int N = 3e5 + 233;
int pre[N], id[N], n, m;

inline int find(int x) {
    return pre[x] == x ? x : pre[x] = find(pre[x]);
}

inline void make(int x, int y) {
    pre[find(x)] = find(y);
}

int main(void) {
    read(n); read(m);
    rep (i, m) id[i] = i + n;
    rep (i, m + n) pre[i] = i;
    rep (i, n) {
	int p;
	read(p);
	rep (k, p) {
	    int t; read(t);
	    make(i, id[t]);
	}
    }
    set <int> s;
    rep (i, n) s.insert(find(i));
    cout << (s.size() == 1 ? "YES" : "NO") << "\n";
}

Submission Info

Submission Time
Task C - Interpretation
User foreverpiano
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1061 Byte
Status AC
Exec Time 12 ms
Memory 1408 KB

Judge Result

Set Name sample dataset1 dataset2
Score / Max Score 0 / 0 200 / 200 200 / 200
Status
AC × 2
AC × 12
AC × 27
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 2 ms 256 KB
01-03.txt AC 2 ms 256 KB
01-04.txt AC 2 ms 256 KB
01-05.txt AC 2 ms 256 KB
01-06.txt AC 1 ms 256 KB
01-07.txt AC 2 ms 256 KB
01-08.txt AC 1 ms 256 KB
01-09.txt AC 2 ms 256 KB
01-10.txt AC 1 ms 256 KB
02-01.txt AC 11 ms 1024 KB
02-02.txt AC 7 ms 640 KB
02-03.txt AC 10 ms 640 KB
02-04.txt AC 11 ms 1280 KB
02-05.txt AC 8 ms 640 KB
02-06.txt AC 12 ms 1280 KB
02-07.txt AC 8 ms 640 KB
02-08.txt AC 6 ms 640 KB
02-09.txt AC 9 ms 1408 KB
02-10.txt AC 8 ms 1280 KB
02-11.txt AC 8 ms 1280 KB
02-12.txt AC 8 ms 896 KB
02-13.txt AC 8 ms 896 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 1 ms 256 KB