View Compilation Error

0_0_33456039_22010.cpp: In function 'int main()':
0_0_33456039_22010.cpp:27:18: error: 'x' was not declared in this scope
    scanf("%d%d",&x,&ay);
                  ^
0_0_33456039_22010.cpp:27:21: error: 'ay' was not declared in this scope
    scanf("%d%d",&x,&ay);
                     ^
0_0_33456039_22010.cpp:29:25: error: 'y' was not declared in this scope
    if(x==1) v.push_back(y);
                         ^
0_0_33456039_22010.cpp:30:10: error: 'y' was not declared in this scope
    a1[x][y]=a1[y][x]=1;
          ^