Submission #976256

#TimeUsernameProblemLanguageResultExecution timeMemory
976256vjudge1Trol (COCI19_trol)C++17
50 / 50
1 ms600 KiB
#include <bits/stdc++.h> using namespace std; #define int long long int f(int x) { int ans = x/9; ans *= 45; int leftover = x%9; ans += leftover * (leftover+1)/2; return ans; } void solve() { int l,r;cin>>l>>r; cout << f(r) - f(l-1) << endl; } int32_t main() { ios_base::sync_with_stdio(0);cin.tie(NULL); int t;cin>>t; while (t--) solve(); return 0; }
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