Submission #976632

#TimeUsernameProblemLanguageResultExecution timeMemory
976632vjudge1Trol (COCI19_trol)C++17
30 / 50
1081 ms348 KiB
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

ll hitung(ll x) {
    ll temp = 0;
    while (x>0) {
        temp+=x%10;
        x/=10;
    }
    if (temp>=10) {
        return hitung(temp);
    }
    return temp;
}

int main() {
    ll q;cin >> q;
    while (q--) {
        ll l, r; cin >> l >> r;
        ll ans = 0;
        for (ll i=l;i<=r;i++) {
            ans+=hitung(i);
        }
        cout << ans << endl;
    }
    return 0;
}
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