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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long long n, a, c, x, mn[38];
  5. vector<long long> pos[38];
  6.  
  7. int main()
  8. {
  9.     long long i, j;
  10.     for (i=1; i<=37; i++) mn[i] = 40;
  11.     scanf("%lld", &n);
  12.     for (i=1; i<=n; i++)
  13.     {
  14.         scanf("%lld", &c);
  15.         for (j=1; j<=c; j++)
  16.         {
  17.             scanf("%lld", &a);
  18.             if (c<=mn[a])
  19.             {
  20.                 if (c<mn[a]) pos[a].clear();
  21.                 pos[a].push_back(i);
  22.                 mn[a] = c;
  23.             }
  24.         }
  25.     }
  26.     scanf("%lld", &x);
  27.     printf("%lld\n", pos[x].size());
  28.     for (i=0; i<pos[x].size(); i++)
  29.     {
  30.     	printf("%lld", pos[x][i]);
  31.     	if (i+1 == pos[x].size()) printf("\n");
  32.     	else printf(" ");
  33.     }
  34. }
Success #stdin #stdout 0s 5300KB
comments (?)
stdin 
4
3
7 19 20
4
4 19 24 0
2
26 10
3
19 31 24
19
stdout 
2
1 4
https://ideone.com/e1GKh4
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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