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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. const int mx = 1e5;
  5. int a[mx+5];
  6.  
  7. int main() {
  8. 	int n, x, y, ans = 0;
  9. 	cin >> n;
  10. 	for (int i = 1; i < n; i++) cin >> a[i];
  11. 	cin >> x >> y;
  12. 	for (int i = x; i < y; i++) ans += a[i];
  13. 	cout << ans << endl;
  14.     return 0;
  15. }
  16.  
Success #stdin #stdout 0s 4472KB
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stdin
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3
5 6
1 3
stdout
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11
https://ideone.com/kBuUhi
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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