【hdu 5053】the Sum of Cube
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the Sum of Cube
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3099 Accepted Submission(s): 1305
Problem Description
A range is given, the begin and the end are both integers. You should sum the cube of all the integers in the range.
Input
The first line of the input is T(1 <= T <= 1000), which stands for the number of test cases you need to solve.
Each case of input is a pair of integer A,B(0 < A <= B <= 10000),representing the range[A,B].
Each case of input is a pair of integer A,B(0 < A <= B <= 10000),representing the range[A,B].
Output
For each test case, print a line “Case #t: ”(without quotes, t means the index of the test case) at the beginning. Then output the answer – sum the cube of all the integers in the range.
Sample Input
21 32 5
Sample Output
Case #1: 36Case #2: 224
代码:
#include<cstdio>#include<cmath>#include<algorithm>typedef __int64 LL;using namespace std;LL sum[10005];int main(){int t;scanf("%d",&t);sum[1]=1;for(int i=2;i<10005;i++) sum[i]=sum[i-1]+(LL)i*i*i;int cs=1;while(t--){int a,b;scanf("%d%d",&a,&b);printf("Case #%d: %I64d\n",cs++,sum[b]-sum[a-1]);}return 0;}
注意一点:数组开的大点 typedef __int64 LL;
%I64d
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