# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
976016 | vjudge1 | Trol (COCI19_trol) | C++17 | 1 ms | 348 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll cek(ll r){
ll ans = (r / 9) * 45;
for(ll i = 1; i <= r % 9; i++){
ans += i;
}
return ans;
}
int main(){
ll q, l, r;
cin >> q;
for(ll i = 0; i < q; i++){
cin >> l >> r;
cout << cek(r) - cek(l - 1) << endl;
}
return 0;
}
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