ant.c
#include <stdio.h>
/*#include <math.h>*/
double ah(double n)
{
return (n<0)?-n:n;
}
int main(){
int L,A,maxL,maxR,mid,mid2;
double L2;
int p,i;
char c;
/*struct {
}Pole[100000];*/
while(scanf("%d%d",&L
,&A
)!=EOF
){ L2=L/2.0;
maxL=maxR=mid2=-1;
if(c=='R')
maxR=p;
else
maxL=p;
mid=p;
for(i=2;i<=A;++i){
if(c=='R'){
if(p<maxR) maxR=p;
}else{
if(p>maxL) maxL=p;
}
if(ah(p-L2)<ah(mid-L2)){ mid=p; mid2=-1;}
else if(ah(p-L2)==ah(mid-L2)) mid2=p;
}
//printf("%d%d%d\n",maxL,maxR,L);
maxL=(maxL>maxR)?maxL:(L-maxR);
printf("The last ant will fall down in %d seconds - started at %d",maxL
,mid
); if(mid2
!=-1) printf(" and %d.\n",mid2
); }
return 0;
}