Submission #19767

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
19767	2016-02-25 05:24:27	Qwaz	괄호 (kriii4_R)	C++14	100 / 100	137 ms	1084 KiB

R

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#include <cstdio>
typedef long long ll;
const int MOD = 1000000007;
ll modpow(ll a, ll x) {
  ll ret = 1;
  a = a % MOD;
  while (x) {
    if (x & 1) ret = ret * a % MOD;
    a = a * a % MOD;
    x >>= 1;
  }
  return ret;
}
int main() {
  int n, k;
  scanf("%d%d", &n, &k);
  ll res = 1, catalan = 1, xk = 1;
  for (int i = 2; i <= n+1; i++) {
    if (i & 1) {
      res = res * (k+1) % MOD;
    } else {
      res = (res * (k+1) - catalan * xk) % MOD;
      if (res < 0) res += MOD;
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 92 / 92