Submission #308365

#	Time	Username	Problem	Language	Result	Execution time	Memory
308365		ErdosSzekeres	Trol (COCI19_trol)	C++14	50 / 50	1 ms	372 KiB

trol

#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll eq(ll x){
    if(x==0)return 0;
    x = x%9;
    if(x==0)return 9;
    return x;
}
int main(){
    int q; cin>>q;
    while(q--){
        ll li,ri; cin>>li>>ri;
        ll ans = 0;
        if(ri-li+1 <= 300){
            for(ll i=li; i<=ri; i++)ans += eq(i);
            cout<<ans<<endl;
        }else{
            while(li%9 != 0)ans+=eq(li++);
            while(ri%9 != 8)ans+=eq(ri--);
            ans += ((ri-li+1)/9LL)*45;
            cout<<ans<<endl;
        }
    }
}

• Subtask 1: 50 / 50