Go: package main

import (
        "fmt"
)

const MAX_N = 31
var lines [MAX_N]int

func main() {
        var n, w int
        fmt.Scanf("%d", &n)
        fmt.Scanf("%d", &w)

        Init()
        var l, r int
        for {
                _, err := fmt.Scanf("%d,%d", &l, &r)
                if err != nil {
                        break
                }

                Swp(l, r)
        }

        for i := 1; i <= n; i++ {
                fmt.Printf("%d\n", lines[i])
        }
}

func Swp(l int, r int) {
        var s int
        s = lines[l]
        lines[l] = lines[r]
        lines[r] = s
}

func Init() {
        for i := 0; i < MAX_N; i++ {
                lines[i] = i
        }
}

C++: #include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

struct Horizontal {
	int pointA;
	int pointB;
};

inline static Horizontal perse_linecomb(string comb);

inline static Horizontal perse_linecomb(string comb) {
	Horizontal horizon;
	int canma_point = comb.find(",");

	horizon.pointA = stoi(comb.substr(0,canma_point));
	horizon.pointB = stoi(comb.substr(canma_point + 1));

	return horizon;
}

int main(void) {
	int vertical_num;
	int horizontal_num;

// enter number of vertical line
	// cout << "enter vertical line number:";
	cin >> vertical_num;
	vector<int> line(vertical_num);
	for(int i = 0; i < vertical_num; i++) {
		line.at(i) = i + 1;
	}

// enter number of horizontal line
	// cout << "enter horizontal line number:";
	cin >> horizontal_num;

//
	vector<Horizontal> horizontal_line(horizontal_num);
	// cout << "enter " << horizontal_num << " points" << endl;
	for(int i = 0; i < horizontal_num; i++) {
		string comb;
		// cout << i + 1 << " line: ";
		cin >> comb;
		horizontal_line.at(i) = perse_linecomb(comb);
	}

	for(const Horizontal &x : horizontal_line) {
		int temp;
		temp = line.at(x.pointA - 1);
		line.at(x.pointA - 1) = line.at(x.pointB - 1);
		line.at(x.pointB - 1) = temp;
	}

// print console
	for(int i = 0; i < vertical_num; i++) {
		cout << line.at(i) << endl;
	}

}

C++: #include <iostream>
#include <algorithm>
#include <cstring>
#include <sstream>
using namespace std;

int main(){
	int n, m;
	cin >> n >> m;
	int a[n];
	for(int i = 0; i < n; i++){
		a[i] = i+1;
	}
	for(int i = 0; i < m; i++){
		stringstream ss1, ss2;
		string str;
		int p, q;
		cin >> str;
		ss1 << str[0];
		ss2 << str[2];
		ss1 >> p;
		ss2 >> q;
		swap(a[p-1],a[q-1]);
	}
	for(int i = 0; i < n; i++){
		cout << a[i] << endl;
	}
}

C++: #include <iostream>
#include <cstdio>
#include <algorithm>
#include <utility>

using namespace std;

int main() {
	int w, n;
	int change[30][2];
	int line[30];
	cin >> w >> n;
	for (int i = 0; i < n; ++i) {
		scanf_s("%d,%d", &change[i][0], &change[i][1]);
	}
	
	for (int i = 0; i < w; ++i) {
		line[i] = i + 1;
	}
	for (int i = 0; i < n; ++i) {
		swap(line[change[i][0] - 1], line[change[i][1] - 1]);
		//for (int i = 0; i < w; ++i) {
		//	cout << line[i] << " ";
		//}
		//cout << endl;
		//cout << "--------------------------" << endl;
	}
	for (int i = 0; i < w; ++i) {
		cout << line[i] << endl;;
	}
}

C++: #include<iostream>
using namespace std;

int main(){
int w,n,a,b,c;
int number[30];
cin>>w;
cin>>n;
for(int i=0;i<n;i++){
scanf("%d,%d",&a,b);
c=number[a-1];
number[a-1]=number[b-1];
number[b-1]=c;}
for(int i=0;i<w;i++){
cout<<number[i]<<endl;}}

C++: #include <stdio.h>

int main(void)
{
	int w,n;
	char str[4];
	int l1, l2;
	int ans[30];
	int i;
	
	scanf("%d %d", &w, &n);
	
	for (i = 0; i < w; i++){
		ans[i] = i + 1;
	}
	
	while (n){
		scanf("%s", str);
		
		l1 = str[0] - '1';
		l2 = str[2] - '1';
		
		ans[l1] += ans[l2];
		ans[l2] = ans[l1] - ans[l2];
		ans[l1] -= ans[l2];
		
		n--;
	}
	
	for (i = 0; i < w; i++){
		printf("%d\n", ans[i]);
	}
	
	return (0);
}

C++: #include <iostream>
#include <cstdio>

using namespace std;

void swap(int *var1, int *var2) {
  int tmp = *var1;
  *var1 = *var2;
  *var2 = tmp;
}

int main() {
  int w;
  int n;

  cin >> w;
  cin >> n;

  int vertical_line[w];
  for (int v_i = 0; v_i < w; v_i++)
    vertical_line[v_i] = v_i;

  for (int n_i = 0; n_i < n; n_i++) {
    int node1, node2;
    scanf("%d,%d", &node1, &node2);
    swap(vertical_line+node1, vertical_line+node2);    
  }

  for (int v_i = 0; v_i < w; v_i++)
    cout << vertical_line[v_i] << endl;

  return 0;
}

C++: #include <iostream>
#include <cstdio>

using namespace std;
static const int MAXV = 32;

int main() {
  int w, n, A[MAXV], a, b, tmp;
  scanf("%d %d", &w, &n);
  for(int i=1;i<w+1;i++)
    A[i]=i;
  //for(int i=0;i<w+1;i++)
  //  printf("%d\n", A[i+1]);
  for(int i=0;i<n;i++) {
    scanf("%d,%d", &a, &b);
    //printf("%d %d\n", a, b);
    tmp=A[a];
    A[a]=A[b]; A[b]=tmp;
    //printf("\n%d %d %d %d %d\n", A[1], A[2], A[3], A[4], A[5]);
  }
  for(int i=1;i<w+1;i++)
    printf("%d\n", A[i]);
}

C++: #include <bits/stdc++.h>

using namespace std;

int main() {
	int w, n;
	cin >> w >> n;

	int kuji[n], a[n], b[n];
	for (int i = 1; i <= w; i++) kuji[i] = i;

	for (int i = 0; i < n; ++i) {
		scanf("%d, %d", &a[i], &b[i]);
		int tmp = kuji[a[i]];
		kuji[a[i]] = kuji[b[i]];
		kuji[b[i]] = tmp;
	}

	for (int i = 1; i <= w; ++i) {
		cout << kuji[i] << endl;
	}
}

C++: // 2011/06/04 Tazoe

#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main()
{
	int w;
	cin >> w;

	int amd[31];
	for(int i=1; i<=w; i++)
		amd[i] = i;

	int n;
	cin >> n;

	for(int i=0; i<n; i++){
		string str;
		cin >> str;

		for(int j=0; j<str.size(); j++)
			if(str[j]==',')
				str[j] = ' ';

		istringstream ist(str);
		int a, b;
		ist >> a >> b;

		int tmp = amd[a];
		amd[a] = amd[b];
		amd[b] = tmp;
	}

	for(int i=1; i<=w; i++)
		cout << amd[i] << endl;

	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
int main()
{
    int w,n,str[30],fin[30],ans[31],add[31],now=0;
    string stri;
    cin>>w>>n;
    for(int i=0;i<n;i++){
        cin>>stri;
        str[i]=stri[0]-'0';
        fin[i]=stri[2]-'0';
        add[i]=fin[i]-str[i];
    }
    for(int i=1;i<=w;i++){
        now=i;
        for(int j=0;j<n;j++){
            if(now==str[j])now+=add[j];
            else if(now==fin[j])now-=add[j];
        }
        ans[now]=i;
    }
    for(int i=1;i<=w;i++)cout<<ans[i]<<endl;
}

C++: #include<iostream>
using namespace std;

int main(){
int w = 0;
cin >> w ;
int n = 0;
cin >> n;
int i = 1;
int a[w];
for(i = 0;i < w;i++){
a[i] = i + 1;
}
for(i = 1;i <= n;i++){
int aa = 0;int bb = 0;
char split;
cin >> aa >> split >> bb ;
int c = 0;
c = a[aa - 1];
a[aa - 1] = a[bb - 1];
a[bb - 1] = c;
}
for(i = 0;i < w; i++){
cout << a[i] << endl;
}
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
  int w, n;
  cin >> w >> n;
  vector<int> a;
  for (int i = 0; i < n; i++) {
    string s;
    cin >> s;
    a.push_back(s.at(0) - '0');
    a.push_back(s.at(2) - '0');
  }
  vector<int> ans(w);
  for (int i = 1; i <= w; i++) {
    int tmp = i;
    for (int j = 0; j < a.size(); j += 2) {
      if (tmp == a.at(j)) {
        tmp = a.at(j + 1);
        continue;
      }
      if (tmp == a.at(j + 1)) {
        tmp = a.at(j);
        continue;
      }
    }
    ans.at(tmp - 1) = i;
  }
  for (int i = 0; i < w; i++) {
    cout << ans.at(i) << endl;
  }
}

C++: #include <iostream>
#include<cstdio>
using namespace std;
int main (){
	int w,N,d[31],sub;
	int a,b;

	cin>>w>>N;
	for(int j=1;j<=w;j++){
		d[j]=j;
	}
	for(int i=0;i<N;i++){
        scanf("%d,%d",&a,&b);
		sub=d[b];
		d[b]=d[a];
		c[a]=sub;
	}
	for(int k=1;k<=w;k++){
	cout<<d[k]<<endl;
	}

	return 0;
}