Accepted
/in/foo.cc: In function 'void tarjan(int)':
/in/foo.cc:22:10: warning: statement has no effect [-Wunused-value]
for(top;stack[top+1]!=u;top--){
^
/in/foo.cc: In function 'void tarjan(int)':
/in/foo.cc:22:10: warning: statement has no effect [-Wunused-value]
for(top;stack[top+1]!=u;top--){
^
