Submission #20121

#	Time	Username	Problem	Language	Result	Execution time	Memory
20121		sys7961	괄호 (kriii4_R)	C++14	0 / 100	3 ms	1860 KiB

R

#include<stdio.h>

long long dy[100100];
long long m = 1000000007;

int main() {
	long long n, k;
	scanf("%lld%lld", &n, &k);
	dy[0] = 1;
	long long sum = 0;
	long long p = 0;
	for (int i = 0; i < n; i++) {
		dy[i + 1] = (dy[i] * k)%m;
		p += sum;
		p %= m;
		dy[i + 1] += p;
		dy[i + 1] % m;
		sum += dy[i + 1];
		sum %= m;
	}
	printf("%lld", dy[n]);
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 92