Max Sequence Time Limit: 2000ms, Special Time Limit:5000ms, Memory Limit:32768KB Total submit users: 88, Accepted users: 73 Problem 10478 : No special judgement Problem description Give you N integers a1, a2 ... aN (|ai| <=1000, 1 <= i <= N). You should output S. Input The input will consist of several test cases. For each test case, one integer N (2 <= N <= 100000) is given in the first line. Second line contains N integers. The input is terminated by a single line with N = 0. Output For each test of the input, print a line containing S. Sample Input 5 -5 9 -5 11 20 0 #include <stdio.h> #include <limits.h> int a[100002],b[100002],c[100002]; int main(){ int i,n,t,sum; while(scanf("%d",&n) && n){ for(i=0; i<n; i++) scanf("%d",&a[i]); for(t=0,sum=INT_MIN,i=0; i<n; i++){ if(t>0) t+=a[i]; else t=a[i]; if(t>sum) sum=b[i]=t; else b[i] = sum; } for(t=0,sum=INT_MIN,i=n-1; i>=1; i--){ if(t>0) t+=a[i]; else t=a[i]; if(t>sum) sum=c[i]=t; else c[i] = sum; } for(sum=b[0]+c[1],i=2; i<n-2; i++){ if(b[i]+c[i+1]>sum) sum=b[i]+c[i+1]; } printf("%d\n",sum); } return 0; }

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