#include <algorithm> #include <cassert> #include <cctype> #include <cmath> #include <cstdio> #include <cstdlib> #include <ctime> #include <deque> #include <functional> #include <iomanip> #include <iostream> #include <list> #include <map> #include <queue> #include <random> #include <set> #include <sstream> #include <string> #include <utility> #include <vector> #define REP(i,s,n) for(int i=(int)(s);i<(int)(n);i++) #define DEBUGP(val) cerr << #val << "=" << val << "\n" using namespace std; typedef long long int ll; typedef vector<int> VI; typedef vector<ll> VL; typedef pair<int, int> PI; const ll mod = 1e9 + 7; int main(void) { ios::sync_with_stdio(false); cin.tie(0); int n, m; cin >> n >> m; vector<VI> r(n, VI(m)); REP(i, 0, n) REP(j, 0, m) cin >> r[i][j]; VI ma(m, -1); vector<VI> ms(m); VI pop(n); int ans = 0; REP(i, 0, n) { REP(j, 0, m) { int val = r[i][j]; if (ma[j] < val) { ma[j] = val; for (int e: ms[j]) { pop[e]--; if (pop[e] == 0) { ans--; } } ms[j].clear(); } if (ma[j] == val) { ms[j].push_back(i); pop[i]++; if (pop[i] == 1) ans++; } } cout << ans << endl; } }