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Problem H: 求1~n的立方和
Problem H: 求1~n的立方和
Time Limit:
1 Sec
Memory Limit:
128 MB
Submit:
839
Solved:
725
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Description
求
sum=1
3
+2
3
+3
3
+……+n
3
之和,输入为不超过20的正整数
如输入为3, 则输出为 1+8+27=36
Sample Input
3
Sample Output
36