#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#define rd_skip() while(*rp++>=48)
#define wt(v) ({unsigned _z=v;do*--wp=_z%10+48;while(_z/=10);})
#define wt1(v) ({char wbuf[64],*wp=wbuf+sizeof wbuf;wt(v);write(1,wp,wbuf+sizeof wbuf-wp);})
#define rep(v,e) for(typeof(e) v=0;v<e;++v)
#define chmax(v,a) (v=v>=a?v:a)

int h[10],d[10];

main(){
	rd_init();
	rd_skip();
	while(*rp){
		rd_skip();
		h[rp[-2]-48]+=1;
	}
	int o=0;
	d[0]=200000;
	rep(i,10){
		o+=h[i]/100;
		rep(j,h[i]%100){
			int b[10];
			rep(k,10){
				b[k]=d[k];
			}
			int l=i;
			rep(k,10){
				chmax(d[l],b[k]+1);
				if(++l==10) l=0;
			}
		}
	}
	wt1(o*100+d[0]-200000);
	_exit(0);
}