标签：stream while return main name using include -- ace
#include<iostream> #include<cstdio> using namespace std; unsigned long long n; int main() { int T; cin>>T; while(T--){ cin>>n; cout<<n*(n+1)/2-1<<"\n"; } return 0; }
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标签：stream while return main name using include -- ace
原文地址：http://www.cnblogs.com/Yzyet/p/6940971.html
