Paste code

#include <stdio.h>

int main(void)
{
    int n, m;
    int a, b;
    char tmp;
    char ans[1001];

    scanf("%d %d", &n, &m);

    int c[m][3];

    for (int i = 0; i < m; i++)//存a跟b
    {
        scanf("%d %d", &c[i][0], &c[i][1]);
    }
    for (int i = 0; i < n; i++)//存座號
    {
        ans[i] = i + 1 + &#039;0&#039;;
    }

    for (int i = m - 1; i >= 0; i--)
    {
        c[i][0] = c[i][0] - 1;
        c[i][1] = c[i][1] - 1;

        tmp = ans[c[i][0]];
        ans[c[i][0]] = ans[c[i][1]];
        ans[c[i][1]] = tmp;
    }

    
    printf("%s\n",ans);

    return 0;
}