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c_cpp
2 years ago
247 B
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#include <iostream> using namespace std; int main() { int n; int b=0; int i; cin >> n; if (n>0 && n!=0) { for (i =1; i<=n; i++) b +=i; } else { for (i=1; i>=n; i--) b+=i } cout << b; }
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