View Compilation Error

0_0_31811196_32274.cpp: In function 'void Floyd()':
0_0_31811196_32274.cpp:19:39: error: 'k' was not declared in this scope
     dist[i][j]=min(dist[i][j],dist[i][k]+dist[k][j]);
                                       ^
0_0_31811196_32274.cpp: At global scope:
0_0_31811196_32274.cpp:22:2: error: expected unqualified-id before 'if'
  if(ans < INF) printf("%d\n",ans);
  ^
0_0_31811196_32274.cpp:23:2: error: expected unqualified-id before 'else'
  else puts("It's impossible.");
  ^
0_0_31811196_32274.cpp:24:1: error: expected declaration before '}' token
 }
 ^