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back to boardHelp,could you tell me what's the problem of my procedure? Posted by  HeroFay 13 Jul 2003 10:55 #include <stdio.h>   static int map[11][11]; int q[150][2]; int N,i,j; int x,y,a,b; int head,tail;   int main() {     scanf("%d",&N);       a = 10,b = 10;     for(i = 0;i < N;i++)     {         scanf("%d%d",&x,&y);         map[x][y] = 1;         if(x < a)         {             a = x,b = y;         }         else if(x == a && y < b)         {             a = x,b = y;         }         scanf("\n");     }         printf("%d %d\n",a,b);     for(head = 0,tail = head + 1,q[head][0] = a,q[head][1] = b,map[a][b] = 2;head < tail;head++)     {         x = q[head][0];         y = q[head][1];         if(map[x + 1][y] == 1)         {             map[x + 1][y] = 2;             q[tail][0] = x + 1;             q[tail++][1] = y;             printf("R");         }         if(map[x][y + 1] == 1)         {             map[x][y + 1] = 2;             q[tail][0] = x;             q[tail++][1] = y + 1;             printf("T");         }         if(map[x - 1][y] == 1)         {             map[x - 1][y] = 2;             q[tail][0] = x - 1;             q[tail++][1] = y;             printf("L");         }         if(map[x][y - 1] == 1)         {             map[x][y - 1] = 2;             q[tail][0] = x;             q[tail++][1] = y - 1;             printf("B");         }         map[x][y] = 3;           if(tail - 1 == head)             printf(".\n");         else             printf(",\n");     }       return 0; }  |  
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