Submission #2708223


Source Code Expand

check[30], c, n, a, xor_sum, A, B, i;
main() {
  while (1) {
    c = getchar_unlocked();
    if (48 <= c && c <= 57)
      n = n * 10 + c - 48;
    else
      break;
  }

  for (i = 0; i < n; i++) {
    a = 0;
    while (1) {
      c = getchar_unlocked();
      if (48 <= c && c <= 57)
        a = a * 10 + c - 48;
      else
        break;
    }
    xor_sum ^= a;
    check[__builtin_popcount(a ^ (a - 1)) - 1] = 1;
  }

  for (B = 29; B >= 0; B--)
    if (check[B] && ((1 << B) & xor_sum))
      xor_sum ^= (1 << (B + 1)) - 1, A++;

  printf("%d\n", xor_sum ? -1 : A);
}

Submission Info

Submission Time
Task C - Cheating Nim
User kenkoooo
Language C (GCC 5.4.1)
Score 500
Code Size 600 Byte
Status AC
Exec Time 4 ms
Memory 128 KB

Compile Error

./Main.c:1:1: warning: data definition has no type or storage class
 check[30], c, n, a, xor_sum, A, B, i;
 ^
./Main.c:1:1: warning: type defaults to ‘int’ in declaration of ‘check’ [-Wimplicit-int]
./Main.c:1:12: warning: type defaults to ‘int’ in declaration of ‘c’ [-Wimplicit-int]
 check[30], c, n, a, xor_sum, A, B, i;
            ^
./Main.c:1:15: warning: type defaults to ‘int’ in declaration of ‘n’ [-Wimplicit-int]
 check[30], c, n, a, xor_sum, A, B, i;
               ^
./Main.c:1:18: warning: type defaults to ‘int’ in declaration of ‘a’ [-Wimplicit-int]
 check[30], c, n, a, xor_sum, A, B, i;
                  ^
./Main.c:1:21: warning: type defaults to ‘int’ in declaration of ‘xor_sum’ [-Wimplicit-int]
 check[30], c, n, a, xor_sum, A, B, i;
                     ^
./Main.c:1:30: warning: type defaults to ‘int’ in declaration of ‘A’ [-Wimplicit-int]
 check[30], c, n, a, xor_sum, A, B, i;
                              ^
./Main.c:1:33: warning: type defaults to ‘int’ in declaration of ‘B’ [-Wimplicit-i...

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 2
AC × 26
Set Name Test Cases
Sample example0.txt, example1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, example0.txt, example1.txt
Case Name Status Exec Time Memory
000.txt AC 0 ms 128 KB
001.txt AC 0 ms 128 KB
002.txt AC 4 ms 128 KB
003.txt AC 1 ms 128 KB
004.txt AC 2 ms 128 KB
005.txt AC 2 ms 128 KB
006.txt AC 4 ms 128 KB
007.txt AC 4 ms 128 KB
008.txt AC 4 ms 128 KB
009.txt AC 4 ms 128 KB
010.txt AC 4 ms 128 KB
011.txt AC 4 ms 128 KB
012.txt AC 4 ms 128 KB
013.txt AC 4 ms 128 KB
014.txt AC 4 ms 128 KB
015.txt AC 4 ms 128 KB
016.txt AC 4 ms 128 KB
017.txt AC 4 ms 128 KB
018.txt AC 4 ms 128 KB
019.txt AC 4 ms 128 KB
020.txt AC 4 ms 128 KB
021.txt AC 1 ms 128 KB
022.txt AC 1 ms 128 KB
023.txt AC 4 ms 128 KB
example0.txt AC 0 ms 128 KB
example1.txt AC 0 ms 128 KB