#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <ctype.h>
#include <bitset>

FILE *fin = fopen("sortaret.in", "r");
FILE *fout = fopen("sortaret.out", "w");

#define BUF 1 << 17
char buf[BUF];
int pos = BUF;

inline char next()  {
    if(pos == BUF)
        fread(buf, 1, BUF, fin), pos = 0;
    return buf[pos++];
}

inline int readInt()  {
    int x = 0, semn = 1;
    char ch = next();
    while(!isdigit(ch) && ch != '-')
        ch = next();
    if(ch == '-')
        semn = -1, ch = next();
    while(isdigit(ch))
        x = x * 10 + ch - '0', ch = next();
    return x * semn;
}

#define Nmax 50000
#define Mmax 100000

std::vector <int> v[Nmax + 1];
std::bitset <Nmax + 1> b;
int sol[Nmax + 1], ind;

void DFS(int nod)  {
    if(b[nod])
        return;
    b[nod] = 1;
    for(int i = 0;i < v[nod].size();i++)  {
        int y = v[nod][i];
        DFS(y);
    }
    sol[ind++] = nod;
}

int main()  {
    int N, M;
    fscanf(fin, "%d%d", &N, &M);
    for(int i = 0;i < M;i++)  {
        int x, y;
        fscanf(fin, "%d%d", &x, &y);
        v[x].push_back(y);
    }

    for(int i = 1;i <= N;i++)
        DFS(i);

    for(int i = ind - 1;i >= 0;i--)
        fprintf(fout, "%d ", sol[i]);

    fclose(fin);
    fclose(fout);
    return 0;
}