Submission #1140554

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140554		brover29	Golf (JOI17_golf)	C++17	0 / 100	648 ms	403524 KiB

golf

#include <bits/stdc++.h>
//qwerty47924692
using namespace std;
using ll = long long;
const ll N=2515;
const string br="617283";
#define sz(a)(ll)a.size()
#define f first
#define s second
ll a[N][N],xa,ya,xb,yb,d[N][N],used[N][N],n,can[N][N][4];
ll dx[4]={1,0,0,-1},dy[4]={0,1,-1,0};
void bfs(ll xs,ll ys){
    deque<pair<ll,ll>>q;
    q.push_front({xs,ys});
    d[xs][ys]=0;
    while(q.size()){
        ll x=q.front().f;
        ll y=q.front().s;
        q.pop_front();
        if(used[x][y])continue;
        used[x][y]=1;
        for(ll i=0;i<4;i++){
            ll nx=x+dx[i];
            ll ny=y+dy[i];

            if(nx<1||nx>2500||ny<1||ny>2500)continue;
            if(a[nx][ny])continue;
         //   if(x==2&&y==5)cout<<nx<<' '<<ny<<'\n';
            if(d[nx][ny]>d[x][y]+can[x][y][i]){
                d[nx][ny]=d[x][y]+can[x][y][i];
                for(ll j=0;j<4;j++)can[nx][ny][j]=1;
                can[nx][ny][i]=0;

            }
            if(d[nx][ny]==d[x][y]+can[x][y][i]){
                can[nx][ny][i]=0;
                if(can[x][y][i])q.push_back({nx,ny});
                else q.push_front({nx,ny});
            }

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

    cin>>xa>>ya>>xb>>yb;
    xa+=10;
    xb+=10;
    ya+=10;
    yb+=10;
    xa*=2;
    ya*=2;
    xb*=2;
    yb*=2;
    cin>>n;
    for(ll i=1;i<=n;i++){
        ll xa,ya,xb,yb;
        cin>>xa>>xb>>ya>>yb;
        xa+=10;
        xb+=10;
        ya+=10;
        yb+=10;
        xa*=2;
        ya*=2;
        xb*=2;
        yb*=2;
        xa++;
        xb--;
        ya++;
        yb--;
        a[xa][ya]++;
        a[xb+1][ya]--;
        a[xa][yb+1]--;
        a[xb+1][yb+1]++;
    }
    for(ll i=1;i<=2500;i++){
        for(ll j=1;j<=2500;j++){
            a[i][j]+=a[i-1][j]+a[i][j-1]-a[i-1][j-1];
            d[i][j]=1e18;
            for(ll k=0;k<4;k++)can[i][j][k]=1;
        }
    }
    bfs(xa,ya);
    cout<<d[xb][yb];
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 70