54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#include <iostream>
|
|
#include <cstdio>
|
|
#include <cstring>
|
|
using namespace std;
|
|
int dp[55][205], a[205], b[205];
|
|
int _, n, x, y, kase = 0;
|
|
bool check(int t)
|
|
{
|
|
memset(dp, -1, sizeof(dp));
|
|
dp[0][0] = 0;
|
|
for(int i = 1; i <= n; ++i)
|
|
{
|
|
if(dp[i][x] >= y) return true;
|
|
for(int j = 0; j <= x; ++j)
|
|
{
|
|
if(dp[i - 1][j] != -1)
|
|
{
|
|
int temp = min(t/a[i], x-j);
|
|
for(int k = 0; k <= temp; ++k)
|
|
{
|
|
int t1 = (t - a[i] * k) / b[i];
|
|
dp[i][j + k] = max(dp[i][j + k], dp[i - 1][j] + t1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(dp[n][x] >= y) return true;
|
|
return false;
|
|
}
|
|
int main(void)
|
|
{
|
|
scanf("%d", &_);
|
|
while(_--)
|
|
{
|
|
scanf("%d%d%d", &n, &x, &y);
|
|
for(int i = 1; i <= n; ++i)
|
|
scanf("%d%d", &a[i], &b[i]);
|
|
int l = 0, r = a[1] * x + b[1] * y;
|
|
int ans = r;
|
|
while(l <= r)
|
|
{
|
|
int mid = (l + r) >> 1;
|
|
if(check(mid))
|
|
{
|
|
ans = mid;
|
|
r = mid - 1;
|
|
}
|
|
else l = mid + 1;
|
|
}
|
|
printf("Case %d: %d\n", ++kase, ans);
|
|
}
|
|
return 0;
|
|
}
|