#include <iostream>
#include <cmath>
using namespace std;
int a[100010][3];
int main()
{
int i=1,j=1,k,expect,down,max,temp,cha,xl,num,s,price,p;
cin>>expect;
while(cin>>a[i][1]>>a[i][2]&&a[i][1]!=-1&&a[i] [2]!=-1)
{
i++;
if(i>2&&a[i-1][1]-a[i-2][1]>1)
{
i--;
cha=(a[i-1][2]-a[i][2])/(a[i][1]-a[i-1][1]);
temp=a[i][1];
for(j=a[i-1][1]+1;j<=temp;j++)
{
a[i][1]=j;
a[i][2]=a[i-1][2]-cha;
i++;
}
}
}
cin>>down;
i--;//
xl=a[i][2];
while(xl>0)
{
if(xl-down<0)break;
else
{
xl-=down;
i++;
a[i][1]=a[i-1][1]+1;
a[i][2]=xl;
}
}
for(j=1;j<=10000;j++)
{
max=-99999;
for(k=1;k<=i;k++)
{
num=(a[k][1]-a[1][1]+j)*a[k][2];
if(num>=max)
{
max=num;
price=a[k][1];
p=1;
}
}
if(price==expect){cout<<j*p;return 0;}
max=-99999;
for(k=1;k<=i;k++)
{
num=(a[k][1]-a[1][1]-j)*a[k][2];
if(num>=max)
{
max=num;
price=a[k][1];
p=-1;
}
}
if(price==expect){cout<<j*p;return 0;}
}
}
你试试，我也不确定，经常WA，最近修的
by 张子尧zzy @ 2019-03-10 18:25:39
代码有点乱
by 张子尧zzy @ 2019-03-10 18:26:19
@[张子尧zzy](/space/show?uid=184696) 希望更丰富的展现？使用Markdown
by 陌小都恰肉肉 @ 2019-04-20 11:13:40
@[陌言·pzt](/space/show?uid=138650) 不会用啊
by whiterrr @ 2019-07-05 13:48:46