Submission #648935

#	Time	Username	Problem	Language	Result	Execution time	Memory
648935		FEDIKUS	Strange Device (APIO19_strange_device)	C++17	100 / 100	2135 ms	100160 KiB

strange_device

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

int main(){
    ll n,a,b;
    cin>>n>>a>>b;
    ll period=-1;
    if(a/__gcd(a,b+1)>(1e18+10)/b+1) period=1e18+10;
    else period=a/__gcd(a,b+1)*b;
    map<ll,ll> ev;
    for(int i=0;i<n;i++){
        ll l,r;
        cin>>l>>r;
        if(r-l+1>=period){
            ev[0]++;
            ev[period]--;
            continue;
        }
        l%=period;
        r%=period;
        if(l<=r){
            ev[l]++;
            ev[r+1]--;
        }else{
            ev[0]++;
            ev[r+1]--;
            ev[l]++;
            ev[period]--;
        }
    }
    ll res=0;
    ll tren=0;
    ll prosli=-1;
    for(auto i:ev){
        tren+=i.second;
        if(tren>0){
            if(prosli==-1) prosli=i.first;
        }else{
            if(res!=-1) res+=i.first-prosli;
            prosli=-1;
        }
    }
    cout<<res;
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30