Submission #933174

#	Time	Username	Problem	Language	Result	Execution time	Memory
933174		De3b0o	Remittance (JOI19_remittance)	C++14	100 / 100	475 ms	83500 KiB

remittance

#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define in insert
#define er erase
#define pb push_back
#define ppb pop_back()
#define ph push
#define pp pop()
#define d3 ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define cans cout << ans << "\n";
#define yes cout << "Yes" << "\n";
#define no cout << "No" << "\n";
#define pll pair<ll,ll>
#define lin cout << "\n";
#define sqr 340
#define mod 1000000007
#define mid ((l+r)/2)

using namespace std;

ll fp(ll x , ll y)
{
    if(y==0)
        return 1;
    ll z = fp(x,y/2);
    if(y&1)
        return z*z*x;
    else
        return z*z;
}

int sqrot(ll x)
{
    int l = 0 , r = INT_MAX;
    while(l<=r)
    {
        if(mid*mid>=x)
            r=mid-1;
        else
            l=mid+1;
    }
    return r+1;
}

ll cel(ll x , ll y)
{
    return x/y + bool(x%y);
}

string tb(ll x)
{
    string s = "";
    while(x>0)
    {
        if(x&1)
            s+='1';
        else
            s+='0';
        x/=2;
    }
    while(s.size()<60)
        s+='0';
    return s;
}

ll fb(string s)
{
    ll x = 0;
    ll c = 1;
    for(int8_t i = 0 ; 60>i ; i++)
    {
        if(s[i]=='1')
            x+=c;
        c*=2;
    }
    return x;
}

int main()
{
    d3
    ll n;
    cin >> n;
    ll a[n+1];
    ll b[n+1];
    for(int i = 1 ; n>=i ; i++)
        cin >> a[i] >> b[i];
    set<ll> s;
    for(int i = 1 ; n>=i ; i++)
        if(a[i]>b[i]&&a[i]>1)
            s.in(i);
    while(!s.empty())
    {
        auto it = s.begin();
        ll x = *it;
        ll y = x+1;
        if(x==n)
            y=1;
        a[y]+=cel(a[x]-b[x],2);
        a[x]-=cel(a[x]-b[x],2)*2;
        if(a[x]<0)
        {
            a[x]+=2;
            a[y]-=1;
        }
        if(a[y]>b[y]&&a[y]>1)
            s.in(y);
        s.erase(it);
    }
    bool l = 1;
    for(int i = 1 ; n>=i ; i++)
        if(a[i]!=b[i])
            l=0;
    if(l)
        yes
    else
        no
}

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