Submission #1010874

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010874		vivkostov	Remittance (JOI19_remittance)	C++14	55 / 100	32 ms	10896 KiB

remittance

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
long long int n,a[200005],b[200005];
void read()
{
    cin>>n;
    int brr=0,brr1=0;
    for(int i=1; i<=n; i++)
    {
        cin>>a[i]>>b[i];
        if(b[i]==0)brr++;
        brr1+=a[i];
    }
    if(brr==n)
    {
        if(brr1)cout<<"No"<<endl;
        else cout<<"Yes"<<endl;
        return;
    }
    int pren=0;
    for(int j=1; j<=50; j++)
    {
        for(int i=1; i<=n; i++)
        {
            a[i]+=pren;
            if(a[i]>=b[i])
            {
                pren=(a[i]-b[i]+1)/2;
                if((a[i]-b[i])%2==1)a[i]=b[i]-1;
                else a[i]=b[i];
            }
        }
    }
    for(int i=1;i<=n;i++)
    {
        if(a[i]!=b[i])
        {
            cout<<"No"<<endl;
            return;
        }
    }
    cout<<"Yes"<<endl;
}
int main()
{
    speed();
    read();
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 0 / 45