POJ 2163 Easy Trading（水~）

来源：互联网发布：java校验身份证编辑：程序博客网时间：2024/06/07 01:06

Description
股票，给出前面到今天共k天的股票价格pi，从第i天开始算起前m天的平均股价为pm[i]，从第i天开始算起前n天的平均股价为pn[i]，m

#include<stdio.h>int main(){    int m,n,k,i;    double kk[10001],sum[10001],pm[10001],pn[10001],eps=1e-9;    scanf("%d%d%d",&m,&n,&k);    sum[0]=0;    for(i=1;i<=k;i++)    {        scanf("%lf",&kk[i]);        sum[i]=sum[i-1]+kk[i];    }    for(i=n;i<=k;i++)         pn[i]=(double)(sum[i]-sum[i-n])/n;    for(i=m;i<=k;i++)        pm[i]=(double)(sum[i]-sum[i-m])/m;    if(pm[n]-pn[n]>eps)        printf("BUY ON DAY %d\n",n);    else if(pn[n]-pm[n]>eps)        printf("SELL ON DAY %d\n",n);    for(i=n+1;i<=k;i++)    {        if(pm[i]-pn[i]>eps&&pn[i-1]-pm[i-1]>eps)            printf("BUY ON DAY %d\n",i);        else if(pn[i]-pm[i]>eps&&pm[i-1]-pn[i-1]>eps)            printf("SELL ON DAY %d\n",i);    }    return 0;}

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