/in/foo.c: In function 'main':
/in/foo.c:5:11: warning: unused variable 'k' [-Wunused-variable]
     int i,k,a,b,w,na,nb,n,N,f=1,t1,t2,t,T,ty;
           ^
/in/foo.c:45:32: warning: 'T' may be used uninitialized in this function [-Wmaybe-uninitialized]
                 else if(n==t&&T>N){
                               ~^~
/in/foo.c:25:17: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
             if(n<t||ty==0){
                ~^~
/in/foo.c:76:9: warning: 't2' may be used uninitialized in this function [-Wmaybe-uninitialized]
         printf("%d %d",t1,t2);
         ^~~~~~~~~~~~~~~~~~~~~
/in/foo.c:76:9: warning: 't1' may be used uninitialized in this function [-Wmaybe-uninitialized]