#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);
}
return 0;
}
Compilation message
W.c:1:17: fatal error: cstdio: No such file or directory
#include<cstdio>
^
compilation terminated.
