Submission #991831
Source Code Expand
#include <bits/stdc++.h> using namespace std; struct UnionFind { vector<int> parent, size; UnionFind(int n) : parent(n), size(n, 1) { for (int i = 0; i < n; i++) { parent[i] = i; } } int operator[](int x) { if (parent[x] == x) return x; return parent[x] = operator[](parent[x]); } bool merge(int x, int y) { x = operator[](x); y = operator[](y); if (x == y) return false; if (size[x] < size[y]) swap(x, y); parent[y] = x; size[x] += size[y]; return true; } }; bool solve() { int n, m; cin >> n >> m; UnionFind uf(n + m); for (int i = 0; i < n; i++) { int k; scanf("%d", &k); for (int j = 0; j < k; j++) { int l; scanf("%d", &l); l--; uf.merge(i, n + l); } } for (int i = 0; i < n; i++) { if (uf[i] != uf[0]) return false; } return true; } int main() { puts(solve() ? "YES" : "NO"); }
Submission Info
Submission Time | |
---|---|
Task | C - Interpretation |
User | pekempey |
Language | C++14 (GCC 5.4.1) |
Score | 400 |
Code Size | 904 Byte |
Status | AC |
Exec Time | 21 ms |
Memory | 1792 KB |
Compile Error
./Main.cpp: In function ‘bool solve()’: ./Main.cpp:35:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &k); ^ ./Main.cpp:38:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &l); ^
Judge Result
Set Name | sample | dataset1 | dataset2 | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | 200 / 200 | ||||||
Status |
|
|
|
Set Name | Test Cases |
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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 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 2 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 | 2 ms | 256 KB |
01-07.txt | AC | 2 ms | 256 KB |
01-08.txt | AC | 2 ms | 256 KB |
01-09.txt | AC | 2 ms | 256 KB |
01-10.txt | AC | 2 ms | 256 KB |
02-01.txt | AC | 15 ms | 1024 KB |
02-02.txt | AC | 18 ms | 1024 KB |
02-03.txt | AC | 14 ms | 640 KB |
02-04.txt | AC | 20 ms | 1408 KB |
02-05.txt | AC | 19 ms | 896 KB |
02-06.txt | AC | 20 ms | 1408 KB |
02-07.txt | AC | 20 ms | 1024 KB |
02-08.txt | AC | 18 ms | 1024 KB |
02-09.txt | AC | 21 ms | 1792 KB |
02-10.txt | AC | 16 ms | 1024 KB |
02-11.txt | AC | 16 ms | 1024 KB |
02-12.txt | AC | 17 ms | 1024 KB |
02-13.txt | AC | 17 ms | 1024 KB |
sample-01.txt | AC | 2 ms | 256 KB |
sample-02.txt | AC | 2 ms | 256 KB |