Submission #21156

#	Time	Username	Problem	Language	Result	Execution time	Memory
21156		jayceking	팩토리얼 세제곱들의 합 (YDX14_fact)	C++14	0 / 1	0 ms	1116 KiB

fact

#include<cstdio>

int main() {
	int n, k;
	scanf("%d %d", &n, &k);
	int d = 0;
	int arr[4][5] = { {1,1,1,1,1}, {1,1,2,6,4},{ 1,1,4,6,6},{1,1,6,6,6} };
	if (n > 4) n = 4;
	for (int i = 0;i <= n;++i) {
		d += arr[k][i];
	}
	while (!(d % 10)) {
		d /= 10;
	}
	printf("%d", d % 10);
}

Compilation message (stderr)

fact.cpp: In function 'int main()':
fact.cpp:5:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &k);
                        ^

• Subtask 1: 0 / 1