Submission #826524

#	Time	Username	Problem	Language	Result	Execution time	Memory
826524		rainboy	Football (info1cup20_football)	C11	100 / 100	30 ms	1964 KiB

football

#include <stdio.h>

int main() {
	int t;

	scanf("%d", &t);
	while (t--) {
		int n, k, k_, a, x;

		scanf("%d%d", &n, &k);
		x = 0;
		while (n--) {
			scanf("%d", &a);
			x ^= a;
		}
		k_ = 1;
		while (k_ <= k)
			k_ <<= 1;
		printf(x & k_ - 1 ? "1" : "0");
	}
	printf("\n");
	return 0;
}

Compilation message (stderr)

football.c: In function 'main':
football.c:19:17: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   19 |   printf(x & k_ - 1 ? "1" : "0");
      |              ~~~^~~
football.c:6:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |  scanf("%d", &t);
      |  ^~~~~~~~~~~~~~~
football.c:10:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |   scanf("%d%d", &n, &k);
      |   ^~~~~~~~~~~~~~~~~~~~~
football.c:13:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |    scanf("%d", &a);
      |    ^~~~~~~~~~~~~~~

• Subtask 1: 26 / 26
• Subtask 2: 8 / 8
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 16 / 16
• Subtask 6: 16 / 16
• Subtask 7: 7 / 7
• Subtask 8: 8 / 8