제출 #20122

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
20122	2016-02-26 06:25:44	sys7961	괄호 (kriii4_R)	C++14	0 / 100	15 ms	8904 KiB

R

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#include<stdio.h>
long long dy[1001000];
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]);
}
 
 
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• Subtask 1: 0 / 8
• Subtask 2: 0 / 92