#include <cstdio>
#include <cctype>

using namespace std;
const int BUF_SIZE = 65536;
char bufferIn[BUF_SIZE], bufferOut[BUF_SIZE];
int posIn = BUF_SIZE, posOut = 0;

char getChar() {
    if (posIn == BUF_SIZE) {
        fread(bufferIn, 1, BUF_SIZE, stdin);
        posIn = 0;
    }
    return bufferIn[posIn++];
}

void readInt(int &x) {
    x = 0; char c = getChar();
    while (!isdigit(c)) c = getChar();
    while (isdigit(c)) {
        x = x * 10 + (c - '0');
        c = getChar();
    }
}
void putChar(char c) {
    if (posOut == BUF_SIZE) {
        fwrite(bufferOut, 1, BUF_SIZE, stdout);
        posOut = 0;
    }
    bufferOut[posOut++] = c;
}

void writeInt(int x) {
    if (x == 0) {
        putChar('0');
        return;
    }
    char s[12];
    int len = 0;
    while (x > 0) {
        s[len++] = (x % 10) + '0';
        x /= 10;
    }
    while (len) putChar(s[--len]);
}
int v[100001];
int dp[100001];
int previ[100001];
int cpy[100001];
int main() {
    freopen("scmax.in", "r", stdin);
    freopen("scmax.out", "w", stdout);

    int n,pmax,vmax = -1;
    readInt(n);
    for(int i=1;i<=n;i++){
        readInt(v[i]);
        dp[i] = 1;
    }
    for(int i=1;i<=n;i++){
        for(int j=1;j<=i;j++){
            if(v[i]>v[j]){
                if(dp[j]+1>dp[i]){
                    dp[i] = dp[j]+1;
                    previ[i] = j;
                }
            }
        }
        if(dp[i]>vmax){
            vmax = dp[i];
            pmax = i;
        }
    }
    int i = pmax;
    while(i!=0){
        cpy[dp[i]] = v[i];
        i = previ[i];

    }
    writeInt(vmax);
    putChar('\n');
    for(int i=1;i<=vmax;i++){
        writeInt(cpy[i]);
        putChar(' ');
    }
    if (posOut > 0) {
        fwrite(bufferOut, 1, posOut, stdout);
    }
    return 0;
}