Submission #854745

#	Time	Username	Problem	Language	Result	Execution time	Memory
854745		Tenis0206	Squirrel (RMI18_squirrel)	C++11	55 / 100	2342 ms	6484 KiB

squirrel

#include <bits/stdc++.h>

using namespace std;

const int vmax = 5e5;

int dx[] = {-1,0,1,0};
int dy[] = {0,1,0,-1};

int m,n,f;

int rez = 0;

int last[vmax + 5];
long long mask[vmax + 5];

bool coprime(int x, int y)
{
    if(!x)
    {
        return (y == 1);
    }
    if(!y)
    {
        return (x == 1);
    }
    if((mask[x] & mask[y]) != 0)
    {
        return false;
    }
    return (last[x] != last[y]);
}

void solve(int x, int y, int s, int dir)
{
    for(int i=1;i<=s;i++)
    {
        int xx = x + i * dx[dir];
        int yy = y + i * dy[dir];
        rez += coprime(xx - 1,yy - 1);
    }
    x = x + s * dx[dir];
    y = y + s * dy[dir];
    if(s==1)
    {
        return;
    }
    for(int i=1;i<=s/2;i++)
    {
        int xs = x + i * dx[dir] + i * dx[(dir + 3) % 4];
        int ys = y + i * dy[dir] + i * dy[(dir + 3) % 4];
        rez += coprime(xs - 1,ys - 1);
    }
    solve(x + (s / 2) * dx[dir] + (s / 2) * dx[(dir + 3) % 4], y + (s / 2) * dy[dir] + (s / 2) * dy[(dir + 3) % 4], s / 2, dir);
    solve(x + (s / 2) * dx[dir] + (s / 2) * dx[(dir + 3) % 4], y + (s / 2) * dy[dir] + (s / 2) * dy[(dir + 3) % 4], s / 2, (dir + 3) % 4);
    for(int i=1;i<=s/2;i++)
    {
        int xd = x + i * dx[dir] + i * dx[(dir + 1) % 4];
        int yd = y + i * dy[dir] + i * dy[(dir + 1) % 4];
        rez += coprime(xd - 1,yd - 1);
    }
    solve(x + (s / 2) * dx[dir] + (s / 2) * dx[(dir + 1) % 4], y + (s / 2) * dy[dir] + (s / 2) * dy[(dir + 1) % 4], s / 2, dir);
    solve(x + (s / 2) * dx[dir] + (s / 2) * dx[(dir + 1) % 4], y + (s / 2) * dy[dir] + (s / 2) * dy[(dir + 1) % 4], s / 2, (dir + 1) % 4);
}

void precalc()
{
    for(int i=2;i<=vmax;i++)
    {
        if(!last[i])
        {
            for(int j=i;j<=vmax;j+=i)
            {
                last[j] = i;
            }
        }
    }
    int cnt = 0;
    for(int i=2;i<=vmax;i++)
    {
        if(!mask[i])
        {
            for(int j=i;j<=vmax;j+=i)
            {
                mask[j] += (1LL<<cnt);
            }
            ++cnt;
        }
        if(cnt > 62)
        {
            break;
        }
    }
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    #ifdef home
    freopen("nr.in","r",stdin);
    freopen("nr.out","w",stdout);
    #endif // home
    cin>>m>>n>>f;
    precalc();
    for(int i=1;i<=f;i++)
    {
        int x,y,s;
        cin>>x>>y>>s;
        rez += coprime(x - 1,y - 1);
        solve(x,y,s,0);
    }
    cout<<rez<<'\n';
    return 0;
}

• Subtask 1: 10 / 15
• Subtask 2: 5 / 10
• Subtask 3: 15 / 25
• Subtask 4: 25 / 50