0_0_29189997_16355.cpp: In function 'int main()': 0_0_29189997_16355.cpp:76:16: error: 'st' was not declared in this scope while(bfs(st,ed)){ ^ 0_0_29189997_16355.cpp:76:19: error: 'ed' was not declared in this scope while(bfs(st,ed)){ ^