Submission #2527378

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Source Code Expand

#include <cstdio>
#include <algorithm>
#define repi(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,a) repi(i,0,a)

using ll = long long;

constexpr int MAX_N = 100000, mod = 1000000007;

int N, K;
int a[MAX_N];
int dp[2][MAX_N+1];

int main()
{
  scanf( "%d%d", &N, &K );
  rep( i, N )
    scanf( "%d", a+i );

  std::sort( a, a+N );

  int lim = 0;

  dp[0][0] = 1;
  rep( i, N )
  {
    int *prv = dp[i%2], *nxt = dp[(i+1)%2];

    std::fill( nxt, nxt+lim+1, 0 );

    rep( j, lim+1 )
    {
      nxt[j] = ((ll)nxt[j]+prv[j]) % mod;
      nxt[j^a[i]] = ((ll)nxt[j^a[i]]+prv[j]) % mod;
    }

    lim |= a[i];
  }

  printf( "%d\n", dp[N%2][K] );

  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf( "%d%d", &N, &K );
                          ^
./Main.cpp:18:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf( "%d", a+i );
                       ^

Judge Result