CSP CCF线性分类器 提供的测试用例是正确的,但提交却是零分,求帮助,不知为啥?

提供的测试用例是正确的,但提交却是零分,求帮助,不知为啥?
参考链接(侵删):https://blog.csdn.net/weixin_42449444/article/details/107819476
代码如下:

#include<iostream>
using namespace std;
struct point{
    int x, y;
    char type;
};

struct line{
    int x, y, z;    
};

int result(point p, line l){
    return l.z + l.x*p.x + l.y*p.y;
}

point p[1003];
line l[23];

int main(){
    int N = 0, M = 0;
    cin >> N >> M;
    for(int k = 0; k < N; k++){
        cin >> p[k].x >> p[k].y >> p[k].type;
    }
    for(int i =0; i < M; i++){
        cin >> l[i].z >> l[i].x >> l[i].y;
    } 
    
    int tempA = 0, tempB = 0;
    bool isA = true, isB = true;
    for(int i =0; i < M; i++){
        tempA = 0, tempB = 0;
        isA = true, isB = true;
        for(int k = 0; k < N; k++){
            if(p[k].type == 'A') tempA = result(p[k],l[i]);
            if(p[k].type == 'B') tempB = result(p[k],l[i]);
        }
        for(int k = 0; k < N; k++){
            if(p[k].type == 'A'){
                isA *= (tempA*result(p[k],l[i]) > 0);
            }
            if(p[k].type == 'B'){
                isB *= (tempB*result(p[k],l[i]) > 0);
            }
        }
        if(isA && isB && tempA*tempB < 0) cout << "Yes" << endl;
        else cout << "No" << endl;
    }
    
    return 0;
} 

测试用例

9 3
1 1 A
1 0 A
1 -1 A
2 2 B
2 3 B
0 1 A
3 1 B
1 3 B
2 0 A
0 2 -3
-3 0 2
-3 1 1

结果如下:

No
No
Yes