Submission #991945
Source Code Expand
/**
* code generated by JHelper
* More info: https://github.com/AlexeyDmitriev/JHelper
* @author RiaD
*/
#include <iostream>
#include <fstream>
#include <iostream>
#include <iterator>
#include <string>
#include <stdexcept>
#ifndef SPCPPL_ASSERT
#ifdef SPCPPL_DEBUG
#define SPCPPL_ASSERT(condition) \
if(!(condition)) { \
throw std::runtime_error(std::string() + #condition + " in line " + std::to_string(__LINE__) + " in " + __PRETTY_FUNCTION__); \
}
#else
#define SPCPPL_ASSERT(condition)
#endif
#endif
/**
* Support decrementing and multi-passing, but not declared bidirectional(or even forward) because
* it's reference type is not a reference.
*
* It doesn't return reference because
* 1. Anyway it'll not satisfy requirement [forward.iterators]/6
* If a and b are both dereferenceable, then a == b if and only if *a and
* b are bound to the same object.
* 2. It'll not work with reverse_iterator that returns operator * of temporary which is temporary for this iterator
*
* Note, reverse_iterator is not guaranteed to work now too since it works only with bidirectional iterators,
* but it's seems to work at least on my implementation.
*
* It's not really useful anywhere except iterating anyway.
*/
template <typename T>
class IntegerIterator: public std::iterator<std::input_iterator_tag, T, std::ptrdiff_t, T*, T> {
public:
explicit IntegerIterator(T value): value(value) {
}
IntegerIterator& operator++() {
++value;
return *this;
}
IntegerIterator operator++(int) {
IntegerIterator copy = *this;
++value;
return copy;
}
IntegerIterator& operator--() {
--value;
return *this;
}
IntegerIterator operator--(int) {
IntegerIterator copy = *this;
--value;
return copy;
}
T operator*() const {
return value;
}
bool operator==(IntegerIterator rhs) const {
return value == rhs.value;
}
bool operator!=(IntegerIterator rhs) const {
return !(*this == rhs);
}
private:
T value;
};
template <typename T>
class IntegerRange {
public:
IntegerRange(T begin, T end): begin_(begin), end_(end) {
SPCPPL_ASSERT(begin <= end);
}
IntegerIterator<T> begin() const {
return IntegerIterator<T>(begin_);
}
IntegerIterator<T> end() const {
return IntegerIterator<T>(end_);
}
private:
T begin_;
T end_;
};
template <typename T>
class ReversedIntegerRange {
typedef std::reverse_iterator<IntegerIterator<T>> IteratorType;
public:
ReversedIntegerRange(T begin, T end): begin_(begin), end_(end) {
SPCPPL_ASSERT(begin >= end);
}
IteratorType begin() const {
return IteratorType(IntegerIterator<T>(begin_));
}
IteratorType end() const {
return IteratorType(IntegerIterator<T>(end_));
}
private:
T begin_;
T end_;
};
template <typename T>
IntegerRange<T> range(T to) {
return IntegerRange<T>(0, to);
}
template <typename T>
IntegerRange<T> range(T from, T to) {
return IntegerRange<T>(from, to);
}
template <typename T>
IntegerRange<T> inclusiveRange(T to) {
return IntegerRange<T>(0, to + 1);
}
template <typename T>
IntegerRange<T> inclusiveRange(T from, T to) {
return IntegerRange<T>(from, to + 1);
}
template <typename T>
ReversedIntegerRange<T> downrange(T from) {
return ReversedIntegerRange<T>(from, 0);
}
template <typename T>
ReversedIntegerRange<T> downrange(T from, T to) {
return ReversedIntegerRange<T>(from, to);
}
template <typename T>
ReversedIntegerRange<T> inclusiveDownrange(T from) {
return ReversedIntegerRange<T>(from + 1, 0);
}
template <typename T>
ReversedIntegerRange<T> inclusiveDownrange(T from, T to) {
return ReversedIntegerRange<T>(from + 1, to);
}
#include <vector>
using namespace std;
class TaskC {
public:
vector<vector<int>> g;
vector<int> used;
void dfs(int v) {
if(used[v]) {
return;;
}
used[v] = true;
for (int to: g[v]) {
dfs(to);
}
}
void solve(std::istream& in, std::ostream& out) {
int n, m;
in >> n >> m;
g.resize(n + m);
used.resize(n + m);
for (int i: range(n)) {
int k;
in >> k;
for (int j: range(k)) {
int a = i + m;
int b;
in >> b;
g[a].push_back(b);
g[b].push_back(a);
}
}
dfs(m);
for (int i: range(m, m + n)) {
if (!used[i]) {
out << "NO";
return;
}
}
out << "YES\n";
}
};
int main() {
std::ios_base::sync_with_stdio(false);
TaskC solver;
std::istream& in(std::cin);
std::ostream& out(std::cout);
in.tie(nullptr);
out << std::fixed;
out.precision(20);
solver.solve(in, out);
return 0;
}
Submission Info
Submission Time |
|
Task |
C - Interpretation |
User |
riadwaw |
Language |
C++14 (GCC 5.4.1) |
Score |
0 |
Code Size |
4687 Byte |
Status |
WA |
Exec Time |
38 ms |
Memory |
9208 KB |
Judge Result
Set Name |
sample |
dataset1 |
dataset2 |
Score / Max Score |
0 / 0 |
0 / 200 |
0 / 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 |
Case Name |
Status |
Exec Time |
Memory |
01-01.txt |
AC |
3 ms |
256 KB |
01-02.txt |
AC |
3 ms |
256 KB |
01-03.txt |
AC |
3 ms |
384 KB |
01-04.txt |
AC |
3 ms |
384 KB |
01-05.txt |
AC |
3 ms |
384 KB |
01-06.txt |
AC |
3 ms |
384 KB |
01-07.txt |
AC |
3 ms |
256 KB |
01-08.txt |
AC |
3 ms |
384 KB |
01-09.txt |
AC |
3 ms |
384 KB |
01-10.txt |
AC |
3 ms |
384 KB |
02-01.txt |
AC |
28 ms |
5888 KB |
02-02.txt |
AC |
29 ms |
6528 KB |
02-03.txt |
AC |
28 ms |
4352 KB |
02-04.txt |
AC |
38 ms |
7680 KB |
02-05.txt |
AC |
33 ms |
6144 KB |
02-06.txt |
AC |
38 ms |
7680 KB |
02-07.txt |
AC |
33 ms |
6528 KB |
02-08.txt |
WA |
25 ms |
6520 KB |
02-09.txt |
AC |
31 ms |
9208 KB |
02-10.txt |
AC |
25 ms |
6520 KB |
02-11.txt |
AC |
25 ms |
6520 KB |
02-12.txt |
AC |
26 ms |
6400 KB |
02-13.txt |
AC |
26 ms |
6400 KB |
sample-01.txt |
AC |
3 ms |
256 KB |
sample-02.txt |
WA |
2 ms |
256 KB |