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View Compilation Error

0_0_28057793_12392.c:13:1: error: unknown type name 'po'
 po b[200000];
 ^
0_0_28057793_12392.c: In function 'bfs':
0_0_28057793_12392.c:17:12: error: request for member 'x' in something not a structure or union
  int x=b[a].x,y=b[a].y,z=b[a].z,t=b[a].t;
            ^
0_0_28057793_12392.c:17:21: error: request for member 'y' in something not a structure or union
  int x=b[a].x,y=b[a].y,z=b[a].z,t=b[a].t;
                     ^
0_0_28057793_12392.c:17:30: error: request for member 'z' in something not a structure or union
  int x=b[a].x,y=b[a].y,z=b[a].z,t=b[a].t;
                              ^
0_0_28057793_12392.c:17:39: error: request for member 't' in something not a structure or union
  int x=b[a].x,y=b[a].y,z=b[a].z,t=b[a].t;
                                       ^
0_0_28057793_12392.c:27:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:28:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:29:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:30:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c:37:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:38:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:39:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:40:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c:48:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:49:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:50:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:51:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c:58:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:59:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:60:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:61:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c:69:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:70:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:71:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:72:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c:79:7: error: request for member 'x' in something not a structure or union
   b[l].x=x;
       ^
0_0_28057793_12392.c:80:7: error: request for member 'y' in something not a structure or union
   b[l].y=y;
       ^
0_0_28057793_12392.c:81:7: error: request for member 'z' in something not a structure or union
   b[l].z=z;
       ^
0_0_28057793_12392.c:82:7: error: request for member 't' in something not a structure or union
   b[l].t=t;
       ^
0_0_28057793_12392.c: In function 'main':
0_0_28057793_12392.c:91:6: error: request for member 'x' in something not a structure or union
  b[0].x=0;
      ^
0_0_28057793_12392.c:92:6: error: request for member 'y' in something not a structure or union
  b[0].y=0;
      ^
0_0_28057793_12392.c:93:6: error: request for member 'z' in something not a structure or union
  b[0].z=0;
      ^
0_0_28057793_12392.c:94:6: error: request for member 't' in something not a structure or union
  b[0].t=0;
      ^
0_0_28057793_12392.c:101:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<m;i++){
   ^
0_0_28057793_12392.c:101:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_28057793_12392.c:102:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int j=0;j<m;j++){
    ^
0_0_28057793_12392.c:103:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int p=0;p<k;p++){
     ^


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