Submission #21287

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
21287	2017-04-12 11:33:08	gs12117	제비 (kriii4_W)	C++11	100 / 100	0 ms	1116 KiB

W

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#include<cstdio>
const int mod = 1000000007;
long long int mpow(int x, int y) {
  if (y == 0)return 1;
  long long int r = mpow(x, y / 2);
  r *= r;
  r %= mod;
  if (y % 2) {
    r *= x;
    r %= mod;
  }
  return r;
}
long long int inv(int x) {
  return mpow(x, mod - 2);
}
int main() {
  int tcn;
  scanf("%d", &tcn);
  while (tcn--) {
    int a, b, c, d;
    scanf("%d%d%d%d", &a, &b, &c, &d);
    long long int ans = d;
    ans += b*inv(c) % mod*d%mod;
    ans += a;
    ans += mod;
    ans -= a*mpow(c*inv(c + 1) % mod, d) % mod;
    ans %= mod;
    printf("%lld\n", ans);
  }
 
 
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Compilation message (stderr)

W.cpp: In function 'int main()':
W.cpp:19:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &tcn);
                   ^
W.cpp:22:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d", &a, &b, &c, &d);
                                    ^

• Subtask 1: 6 / 6
• Subtask 2: 94 / 94