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上傳編號
228165
上傳時間
2025-04-10 19:45:21
題目
[練習題]西格馬嗯
使用者
anonymous
總得分
0,
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in 0 ms
#
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Runtime
Memory
0
Wrong Answer
WA
0
393216
1
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0
446464
3
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0
380928
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#include
<iostream>
#include
<stdio.h>
#include
<cmath>
using
namespace
std
;
int
main
(
)
{
int
n
;
cin
>>
n
;
printf
(
"
%.
4f
"
,
n
*
(
n
+1
)
/
2
)
;
cout
<<
endl
;
}
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