read n m a=() for ((i=0; i<$n; i++)) do a+=( 0 ) done for ((x=0; x<$m; x++)) do read -a b for ((i=0; i<$n; i++)) do a[i]=$((a[i]+b[i])) done sum=0 l=0 for ((r=0; r<$n; r++)) do sum=$((sum+a[r])) while [ $l -lt $r ] && [ $sum -gt 777 ]; do sum=$((sum-a[l])) l=$((l+1)) done if [ $sum -eq 777 ]; then echo "YES" exit 0 fi done done echo "NO"