Handball

A sports club is unhappy with its football results and decides to invest in its handball team. The coaching staff wants to judge players by their consistency, so they ask how many players scored in every single match.

A player counts as scoring in every match when the goal count is at least 1 in all $M$ matches. One match with 0 goals removes that player from the count.

The record set is large, so the counting has to be done by a program. Read the per-match goal record of each player and count how many players scored in every match.

The first line contains two integers $N$ and $M$, the number of players and the number of matches ($1 \le N \le 100$, $1 \le M \le 100$).

Each of the next $N$ lines describes one player. The $i$-th of these lines contains $M$ integers $X_1, X_2, \dots, X_M$, where $X_j$ is the number of goals the $i$-th player scored in the $j$-th match ($0 \le X_j \le 100$).

Print one line with a single integer, the number of players who scored in every match.