Submission #991876


Source Code Expand

#include <cstdio>
#include <vector>
#include <cstring>

using namespace std;

const int MAX_N = 111111;

struct uni {
  int p[MAX_N];
  uni(){init();}
  void init(){ memset(p,-1,sizeof(p)); }
  int root(int a) {
    return p[a]<0?a:(p[a]=root(p[a]));
  }
  bool find(int a,int b){ return root(a) == root(b); }
  bool merge(int a,int b) {
    a = root(a);
    b = root(b);
    if( a == b ) return false;
    p[a] += p[b];
    p[b] = a;
    return true;
  }
  int size(int a){ return -p[root(a)]; }
};

vector<int> g[111111];
uni u;

int main(void) {
  int n, m;
  scanf("%d%d", &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;
      g[l].push_back(i);
    }
  }
  for (int i = 0; i < m; i++) {
    for (int j = 1; j < int(g[i].size()); j++) {
      u.merge(g[i][0], g[i][j]);
    }
  }
  
  bool ok = true;
  for (int i = 0; i < n; i++) {
    if (u.root(0) != u.root(i)) ok = false;
  }
  puts(ok ? "YES" : "NO");
  return 0;
}

Submission Info

Submission Time
Task C - Interpretation
User roxion1377
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1069 Byte
Status AC
Exec Time 30 ms
Memory 5248 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &m);
                        ^
./Main.cpp:35:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int k; scanf("%d", &k);
                           ^
./Main.cpp:37:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
       int l; scanf("%d", &l); --l;
                             ^

Judge Result

Set Name sample dataset1 dataset2
Score / Max Score 0 / 0 200 / 200 200 / 200
Status
AC × 2
AC × 12
AC × 25
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 5 ms 3328 KB
01-02.txt AC 6 ms 3328 KB
01-03.txt AC 6 ms 3328 KB
01-04.txt AC 6 ms 3328 KB
01-05.txt AC 6 ms 3328 KB
01-06.txt AC 6 ms 3456 KB
01-07.txt AC 6 ms 3328 KB
01-08.txt AC 6 ms 3328 KB
01-09.txt AC 6 ms 3328 KB
01-10.txt AC 6 ms 3328 KB
02-01.txt AC 25 ms 5248 KB
02-02.txt AC 23 ms 3840 KB
02-03.txt AC 25 ms 4608 KB
02-04.txt AC 30 ms 4608 KB
02-05.txt AC 28 ms 4096 KB
02-06.txt AC 30 ms 4608 KB
02-07.txt AC 28 ms 4096 KB
02-08.txt AC 21 ms 3840 KB
02-09.txt AC 24 ms 3964 KB
02-10.txt AC 23 ms 5120 KB
02-11.txt AC 23 ms 5120 KB
02-12.txt AC 24 ms 4992 KB
02-13.txt AC 23 ms 4992 KB
sample-01.txt AC 5 ms 3328 KB
sample-02.txt AC 5 ms 3328 KB