【习题4-1 Uva1589】Xiangqi

【链接】 我是链接,点我呀:)

【题意】

在这里输入题意

【题解】

车是可以被吃掉的。。。
注意这个情况。
其他的模拟即可。

【代码】

#include <bits/stdc++.h>
using namespace std;

const int dx[4] = {0,0,1,-1};
const int dy[4] = {1,-1,0,0};
const int dx1[8] = {-1,-2,-2,-1,1,2,2,1};
const int dy1[8] = {-2,-1,1,2,-2,-1,1,2};
const int spe[8][2]={
    {0,-1},
    {-1,0},
    {-1,0},
    {0,1},
    {0,-1},
    {1,0},
    {1,0},
    {0,1}
};

const int N = 7;

struct abc{
    int kind,x,y;
};

int n,x,y;
abc a[N+10];

bool exsit(int x,int y){
    for (int i = 1;i <= n;i++)
        if (a[i].x==x && a[i].y==y)
            return 1;
    return 0;
}

bool check(){
    for (int i = 1;i <= n;i++){
        if (a[i].kind==0){
            if (a[i].y==y){
                bool ok = 0;
                for (int j = 1;j <= n;j++)
                    if (a[j].y==y && a[j].x>x && a[j].x<a[i].x)
                        ok = 1;
                if (!ok) return 0;
            }
        }
        if (a[i].kind==1){
            if (a[i].y==y){
                if (a[i].x==x) continue;
                bool ok = 0;
                for (int j = 1;j <= n;j++)
                    if (a[j].y==y && a[j].x>min(a[i].x,x) && a[j].x<max(a[i].x,x))
                        ok = 1;
                if (!ok) return 0;
            }
            if (a[i].x==x){
                if (a[i].y==y) continue;
                bool ok = 0;
                for (int j = 1;j <= n;j++)
                    if (a[j].x==x && a[j].y>min(a[i].y,y) && a[j].y<max(a[i].y,y))
                        ok = 1;
                if (!ok) return 0;
            }
        }
        if (a[i].kind==2){
            for (int j = 0;j < 8;j++){
                int nex = a[i].x + dx1[j],ney = a[i].y+dy1[j];
                if (nex==x && ney==y){
                    if (!exsit(a[i].x+spe[j][0],a[i].y+spe[j][1])) return 0;
                }
            }
        }
        if (a[i].kind==3){
            if (a[i].x==x){
                int cnt = 0;
                for (int j = 1;j <= n;j++)
                    if (a[j].x==x && a[j].y>min(a[i].y,y) && a[j].y<max(a[i].y,y))
                        cnt++;
                if (cnt==1) return 0;
            }
            if (a[i].y==y){
                int cnt = 0;
                for (int j = 1;j <= n;j++)
                    if (a[j].y==y && a[j].x>min(a[i].x,x) && a[j].x<max(a[i].x,x))
                        cnt++;
                if (cnt==1) return 0;
            }
        }
    }
    return 1;
}

int main()
{
    //freopen("D://rush.txt","r",stdin);
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    while (cin >> n >> x >> y){
        if (n==0 && x == 0 && y==0) break;
        for (int i = 1;i <= n;i++){
            char s[5];
            cin >> s >> a[i].x >> a[i].y;
            if (s[0]=='G') a[i].kind = 0;
            if (s[0]=='R') a[i].kind = 1;
            if (s[0]=='H') a[i].kind = 2;
            if (s[0]=='C') a[i].kind = 3;
        }
        int ok = 0;
        for (int i = 0;i < 4;i++){
            x += dx[i],y+=dy[i];
            if (x>3 || x<1 || y < 4 || y>6) {
                x-=dx[i],y-=dy[i];
                continue;
            }
            if (check()) ok = 1;
            x -= dx[i],y-=dy[i];
        }
        if (ok)
            cout<<"NO"<<endl;
        else
            cout<<"YES"<<endl;
    }
    return 0;
}