Submission #19754

#	Time	Username	Problem	Language	Result	Execution time	Memory
19754		jeapi	괄호 (kriii4_R)	C++98	0 / 100	6 ms	9528 KiB

R

#include<iostream>
using namespace std;
typedef long long ll;
ll D[1000001];
int main() {
	ll N, T;
	cin >> N >> T;
	D[1] = T;
	for (int i = 2; i <= N; i++) {
		if (i % 2 == 0) {
			D[i] = (D[i - 1] * T) % 1000000007;//닫고
			D[i] = (D[i] + D[i - 1]) % 1000000007;//열고
		}
		else {
			D[i] = (D[i - 1] * T) % 1000000007;//닫고
			D[i] = (D[i] + (D[i - 1] - T)) % 1000000007;//열고
		}
	}
	cout << D[N] << endl;
}

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