function Main(input) {
    input = input.trim().split("\n").map(function(x) { return x.split(" ")});

    const lowerBound = (arr, n) => {
        let first = 0, last = arr.length - 1, middle;
        while (first <= last) {
            middle = Math.floor((first + last) / 2);
            if (arr[middle] < n) first = middle + 1;
            else last = middle - 1;
        }
        return first;
    }


    let n = parseInt(input[0][0], 10);
    let v_a = [];
    for (let i = 0; i < n; i++){
        v_a.push(parseInt(input[i + 1][0], 10));
    }
    let dp = Array.from({length: n}, () => Infinity);

    dp[0] = v_a[0];
    let index;
    for (let i = 1; i < n; i++){
        index = lowerBound(dp, v_a[i]);
        dp[index] = v_a[i];
    }

    console.log(lowerBound(dp,1e9+1));

}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));

