foo.cc: In function 'int main()':
foo.cc:32:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
                 if(route[j][l])
                   ^
foo.cc:9:19: warning: unused variable 's' [-Wunused-variable]
     int n,m,k,u,v,s,t;
                   ^
foo.cc:9:21: warning: unused variable 't' [-Wunused-variable]
     int n,m,k,u,v,s,t;
                     ^

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