Problem DescriptionGiven 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. InputThe 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). OutputFor 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 Input25 6 -1 5 4 -77 0 6 -1 1 -6 7 -5 Sample OutputCase 1: 14 1 4 Case 2: 7 1 6 AuthorIgnatius.L RecommendWe have carefully selected several similar problems for you: 1176 1069 2084 1058 1203 代码:
#include<cstdio>
int a[+];
int main()
{
int t,n,k=;
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
for(int i=;i<=n;i++)
scanf("%d",&a[i]);
int max=-,st,endd,sum=,st1=; //注意整数的范围
for(int i=;i<=n;i++)
{
sum+=a[i];
if(sum>max)
{
max=sum;
st=st1;
endd=i;
}
if(sum<)
{
sum=;
st1=i+; //st1是临时的开始点,如果后面的sum<0,这个开始点也就不会计入
}
}
printf("Case %d:\n%d %d %d\n",k++,max,st,endd);
if(t!=)
{
printf("\n");
} }
return ;
}