Submission #478024

#	Time	Username	Problem	Language	Result	Execution time	Memory
478024		LouayFarah	Remittance (JOI19_remittance)	C++14	15 / 100	1 ms	208 KiB

remittance

#include "bits/stdc++.h"

using namespace std;

#define endl "\n"
#define ll long long
#define pb push_back
#define mp make_pair

const long long MOD = 1e9+7;
const long long INF = 1e18;


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);


    ll n;
    cin >> n;

    vector<ll> a(n, 0), b(n, 0);

    for(int i = 0; i<n; i++)
        cin >> a[i] >> b[i];

    bool flag2 = false;
    for(int i = 0; i<n; i++)
    {
        if(b[i]!=0)
        {
            flag2 = true;
            break;
        }
    }

    if(!flag2)
    {
        bool res = true;
        for(int i = 0; i<n; i++)
        {
            if(a[i]!=0)
            {
                res = false;
                break;
            }
        }
        if(res)
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
        return 0;
    }

    for(int i = 0; i<n-1; i++)
    {
        if(a[i]>b[i])
        {
            ll A = a[i], B = b[i];
            ll orig = a[i+1];
            a[i+1]+=ceil(double(A-B)/2);
            orig = a[i+1]-orig;
            a[i]-=2*orig;
        }
    }
    if(a[n-1]>b[n-1])
    {
        ll A = a[n-1], B = b[n-1];
        ll orig = a[0];
        a[0]+=ceil(double(A-B)/2);
        orig = a[0]-orig;
        a[n-1]-=2*orig;
    }

    for(int i = 0; i<n-1; i++)
    {
        if(a[i]>b[i])
        {
            ll A = a[i], B = b[i];
            ll orig = a[i+1];
            a[i+1]+=ceil(double(A-B)/2);
            orig = a[i+1]-orig;
            a[i]-=2*orig;
        }
    }
    if(a[n-1]>b[n-1])
    {
        ll A = a[n-1], B = b[n-1];
        ll orig = a[0];
        a[0]+=ceil(double(A-B)/2);
        orig = a[0]-orig;
        a[n-1]-=2*orig;
    }

    bool flag = true;
    for(int i = 0; i<n; i++)
    {
        if(a[i]!=b[i])
        {
            flag = false;
            break;
        }
    }

    if(flag&&flag2)
        cout << "Yes" << endl;
    else
        cout << "No" << endl;

    return 0;
}

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