poj2479

/* * ===================================================================================== * * Filename: 2479.cpp * * Description: * * Version: 1.0 * Created: 2011年12月07日 20时37分21秒 * Revision: none * Compiler: gcc * * Author: MaZheng (blog.youkuaiyun.com/mazheng1989), mazheng19891019@gmail.com * Company: Dalian University Of Technology * * ===================================================================================== */ // Cprogram.cpp : ¶¨Òå¿ØÖÆ̨ӦÓóÌÐòµÄÈë¿Úµã¡£ // #include<stdio.h> #include<limits.h> #define NUM 50005 int data[NUM]; int pre[NUM]; int n; int sum; int max; int output; int i; int T; int main() { freopen("input.txt","r",stdin); scanf("%d",&T); while(T--) { scanf("%d",&n); sum=0; max=INT_MIN; for(i=0;i<n;i++) { scanf("%d",&data[i]); sum+=data[i]; if(sum>max) { max=sum; } if(sum<0) sum=0; pre[i]=max; } max=INT_MIN; output=INT_MIN; sum=0; for(i=n-1;i>0;i--) { sum+=data[i]; if(sum>max) { max=sum; if(max+pre[i-1]>output) { output=max+pre[i-1]; } } if(sum<0) sum=0; } printf("%d\n",output); } return 0; }