杭电ACM 1001(Sum Problem)
2012-01-21 19:14
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#include<iostream> using namespace std; int main() { int n; signed int sum;//有符号整形 while(cin>>n) { sum=0; for(int i=0;i<=n;i++) sum+=i; cout<<sum<<"\n"<<"\n";//followed with a blank line! } return 0; }
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