Submission #1231758

#	Time	Username	Problem	Language	Result	Execution time	Memory
1231758		Tenis0206	Bring Down the Grading Server (CEOI23_gradingserver)	C++20	10 / 100	306 ms	73460 KiB

gradingserver

#include <bits/stdc++.h>
#define int long long

using namespace std;

const int nmax = 75;

bool dp[nmax + 5][nmax + 5][nmax + 5][nmax + 5];
bool sel[nmax + 5][nmax + 5][nmax + 5][nmax + 5];

int s, q;

bool solve(int C, int F, int c, int f)
{
    if(C <= 0)
    {
        return false;
    }
    /*if(C <= s * f && c <= s * F)
    {
        int D = f - (C - 1) / s;
        int d = F - (c - 1) / s;
        if(D <= d)
        {
            return solve(C, F - D, c, f - d);
        }
        else
        {
            return !solve(c, f - d - 1, C, F - D);
        }
    }*/
    /*if(C - s * f >= 0 && c - s * F <= 0)
    {
        return true;
    }*/
    if(sel[C][F][c][f])
    {
        return dp[C][F][c][f];
    }
    sel[C][F][c][f] = true;
    dp[C][F][c][f] = false;
    if(C - f * s > 0)
    {
        dp[C][F][c][f] = !solve(c - (C - f * s), f, C, F);
    }
    else
    {
        dp[C][F][c][f] = !solve(c, f - 1, C, F);
    }
    /*if(C - f * s > 0 && !solve(c - (C - f * s), f, C, F))
    {
        dp[C][F][c][f] = true;
    }
    else if(f > 0 && !solve(c, f - 1, C, F))
    {
        dp[C][F][c][f] = true;
    }*/
    return dp[C][F][c][f];
}

bool solve1(int C, int F, int c, int f)
{
    if(C <= 0)
    {
        return false;
    }
    if(C <= f && c <= F)
    {
        if(f - C <= F - c)
        {
            return true;
        }
        return false;
    }
    if(C <= f)
    {
        return false;
    }
    return (!solve1(c - (C - f), f, C, F));
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
#ifdef home
    freopen("nr.in","r",stdin);
    freopen("nr.out","w",stdout);
#endif // home
    cin>>s>>q;
    for(int i=1; i<=q; i++)
    {
        int ch, fh, cg, fg;
        cin>>ch>>fh>>cg>>fg;
        bool ok;
        if(s == 1)
        {
            ok = solve1(ch, fh, cg, fg);
        }
        else
        {
            ok = solve(ch, fh, cg, fg);
        }
        if(ok)
        {
            cout<<"YES\n";
        }
        else
        {
            cout<<"NO\n";
        }
    }
    return 0;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 10 / 10
• Subtask 5: 0 / 25
• Subtask 4: 0 / 20
• Subtask 6: 0 / 20
• Subtask 7: 0 / 15