Submission #991612


Source Code Expand

Copy
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cassert>
#include <iostream>
#include <sstream>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <utility>
#include <numeric>
#include <algorithm>
#include <bitset>
#include <complex>
#include <array>
#include <list>
#include <stack>
#include <valarray>

using namespace std;

typedef unsigned uint;
typedef long long Int;
typedef unsigned long long UInt;

const int INF = 1001001001;
const Int INFLL = 1001001001001001001LL;

template<typename T> void pv(T a, T b) { for (T i = a; i != b; ++i) cout << *i << " "; cout << endl; }
template<typename T> void chmin(T& a, T b) { if (a > b) a = b; }
template<typename T> void chmax(T& a, T b) { if (a < b) a = b; }
int in() { int x; scanf("%d", &x); return x; }
double fin() { double x; scanf("%lf", &x); return x; }
Int lin() { Int x; scanf("%lld", &x); return x; }

int U[100050];

void init(int n) {
  for (int i = 0; i < n; ++i) {
    U[i] = i;
  }
}

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

void uni(int x, int y) {
  U[find(x)] = find(y);
}

vector<int> A[100050];

int main() {
  int N = in();
  int M = in();
  for (int i = 0; i < N; ++i) {
    int K = in();
    for (int j = 0; j < K; ++j) {
      int L = in() - 1;
      A[L].push_back(i);
    }
  }

  init(N);
  for (int i = 0; i < M; ++i) {
    for (int j = 0; j + 1 < A[i].size(); ++j) {
      uni(A[i][j], A[i][j + 1]);
    }
  }

  bool ok = true;
  for (int i = 0; i < N; ++i) {
    ok &= find(i) == find(0);
  }

  puts(ok ? "YES" : "NO");
  return 0;
}

Submission Info

Submission Time
Task C - Interpretation
User japlj
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1681 Byte
Status
Exec Time 30 ms
Memory 5372 KB

Compile Error

./Main.cpp: In function ‘int in()’:
./Main.cpp:34:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 int in() { int x; scanf("%d", &x); return x; }
                                  ^
./Main.cpp: In function ‘double fin()’:
./Main.cpp:35:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 double fin() { double x; scanf("%lf", &x); return x; }
                                          ^
./Main.cpp: In function ‘Int lin()’:
./Main.cpp:36:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 Int lin() { Int x; scanf("%lld", &x); return x; }
                                     ^

Judge Result

Set Name Score / Max Score Test Cases
sample 0 / 0 sample-01.txt, sample-02.txt
dataset1 200 / 200 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 200 / 200 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 5 ms 2560 KB
01-02.txt 5 ms 2560 KB
01-03.txt 5 ms 2560 KB
01-04.txt 5 ms 2560 KB
01-05.txt 5 ms 2560 KB
01-06.txt 5 ms 2560 KB
01-07.txt 5 ms 2560 KB
01-08.txt 5 ms 2560 KB
01-09.txt 5 ms 2560 KB
01-10.txt 5 ms 2560 KB
02-01.txt 25 ms 4608 KB
02-02.txt 24 ms 3584 KB
02-03.txt 25 ms 3968 KB
02-04.txt 30 ms 4224 KB
02-05.txt 29 ms 3712 KB
02-06.txt 30 ms 4224 KB
02-07.txt 29 ms 3712 KB
02-08.txt 23 ms 4324 KB
02-09.txt 26 ms 5112 KB
02-10.txt 24 ms 5372 KB
02-11.txt 24 ms 5372 KB
02-12.txt 24 ms 4608 KB
02-13.txt 24 ms 4480 KB
sample-01.txt 5 ms 2560 KB
sample-02.txt 5 ms 2560 KB