1177: 用for计算1至n的和
Memory Limit:32 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:27
Solved:28
Description
计算1至n的和
Input
输入一个正整数n
Output
输出1至n的和
Sample Input Copy
10
Sample Output Copy
55
HINT
n<=10000