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37 lines
844 B
C++

#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
int t, n, H, S, V;
double a[10005], d;
int main()
{
scanf("%d", &t);
double ans;
while (t--)
{
ans = 0;
scanf("%d", &n);
for (int i = 0; i < n; i++)
{
scanf("%lf%lf", a + i, &d);
if (d >= 1)
a[i] = a[i] * a[i] * a[i];
else
a[i] = a[i] * a[i] * a[i] * d;
}
scanf("%d%d%d", &S, &H, &V);
ans += V / S;
for (int i = 0; i < n; i++)
{
ans += a[i] / S;
if (ans > H)
{
ans = H;
break;
}
}
printf("%.2lf\n", ans);
}
return 0;
}