HDOJ1003 Max Sum

Max Sum

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 5271    Accepted Submission(s): 958


Problem Description
Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7), the max sum in this sequence is 6 + (-1) + 5 + 4 = 14.
 


Input
The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow, each line starts with a number N(1<=N<=100000), then N integers followed(all the integers are between -1000 and 1000).
 


Output
For each test case, you should output two lines. The first line is "Case #:", # means the number of the test case. The second line contains three integers, the Max Sum in the sequence, the start position of the sub-sequence, the end position of the sub-sequence. If there are more than one result, output the first one. Output a blank line between two cases.
 


Sample Input
2
5 6 -1 5 4 -7
7 0 6 -1 1 -6 7 -5
 


Sample Output
Case 1:
14 1 4

Case 2:
7 1 6
 


Author
Ignatius.L

 

#include  < iostream >
using   namespace  std;
int  main()
{
    
int T,N,num,start,end;
    cin
>>T;
    
for(int k=0;k<T;k++)
    
{
            cin
>>N;
            
int max=-1001,sum=0,temp=1;
            
for(int i=0;i<N;i++)
            
{
                            cin
>>num;
                            sum
+=num;
                            
if(sum>max)
                            
{
                                       max
=sum;
                                       start
=temp;
                                       end
=i+1;
                            }

                            
if(sum<0)
                            
{
                                     sum
=0;
                                     temp
=i+2;
                            }

            }

            cout
<<"Case "<<k+1<<":"<<endl<<max<<" "<<start<<" "<<end<<endl;
            
if(k!=T-1) cout<<endl;
     
    }

}

代码分析请参考: 最大子序列和的线性算法

Down the code

 http://dl2.csdn.net/down4/20070726/26155623942.cpp

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