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 <cstdio>
#include <vector>
#include <string>

using namespace std;

int main(){
	int w, n;
	cin >> w;
	cin >> n;
	cin.ignore();
	
	vector<int> v(w);
	for(int i = 1; i <= v.size(); i++){
		v[i - 1] = i;
	}

	int a, b, c;
	string buf;
	for(int i = 0; i < n; i++){
		getline(cin, buf);
//		cin >> buf;
		sscanf(buf.c_str(), "%d, %d", &a, &b);
		c = v[a - 1];
		v[a - 1] = v[b - 1];
		v[b - 1] = c;
	}
	for(int& i : v){
		cout << i << endl;
	}
}

C++: #include <iostream>
#include <vector>
#include <sstream>
using namespace std;
int main() {
  int w;
  while (cin >> w) {
    vector<int> vec;
    vec.resize(w);
    for (int i = 0; i < vec.size(); ++i) {
      vec[i] = i + 1;
    }
    int n;
    cin >> n;
    cin.ignore(1, '\n');
    for (int i = 0; i < n; ++i) {
      string str, tmp_a, tmp_b;
      int a, b;
      getline(cin, str);
      istringstream iss(str);
      getline(iss, tmp_a, ',');
      getline(iss, tmp_b, ',');
      a = stoi(tmp_a) - 1;
      b = stoi(tmp_b) - 1;
      int tmp = vec[a];
      vec[a] = vec[b];
      vec[b] = tmp;
    }
    for (int i = 0; i < vec.size(); ++i) {
      cout << vec[i] << endl;
    }
  }
  return 0;
}

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

const static int MAX = 31;

int main()
{

    int N, M, x, y;
    char c;
    std::scanf("%d", &N);
    int arr[N];
    for (int i = 1; i <= N; i++) arr[i] = i;
    std::scanf("%d", &M);
    for (int i = 0; i < M; i++) {
        std::scanf("%d%c%d", &x, &c, &y);
        std::swap(arr[x], arr[y]);
    }
    for (int i = 1; i <= N; i++) std::printf("%d\n", arr[i]);

    return 0;
}

C++: //C++14 (Clang 3.8.0)

#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <string>
#include <climits>
#include <sstream>

using namespace std;
typedef pair<int,int> P;
vector<string> split(const string &s, char delim) {
    vector<string> elems;
    stringstream ss(s);
    string item;
    while (getline(ss, item, delim)) {
    if (!item.empty()) {
            elems.push_back(item);
        }
    }
    return elems;
}

int main(){
  int w,n;
  cin>>w;
  cin>>n;
  int ami[40];
  P bou[40];
  for(int i=0;i<n;i++){
    int x=0,y=0;
    scanf("%d,%d",&x,&y);
    bou[i]=P(x,y);
  }
  for (int i=0;i<w;i++){
    int start=i+1;
    for(int j=0;j<n;j++){
      if(bou[j].first==start){start=bou[j].second;}
      else if(bou[j].second==start){start=bou[j].first;}
    }
    ami[start]=i+1;
  }
  for(int i=1;i<=w;i++)cout<<ami[i]<<endl;






}

C++: #include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
#include <cstring>
#include <utility>
#include <vector>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#define debug(x) cerr << #x << ':' << x << endl
#define rep(i,n) for(int i=0;i<(int)n;++i)
#define ALL(c) (c).begin(), (c).end()
using namespace std;
typedef long long ll;


std::vector<std::string> split(std::string str, char del) {
    int first = 0;
    int last = str.find_first_of(del);
 
    std::vector<std::string> result;
 
    while (first < str.size()) {
        std::string subStr(str, first, last - first);
 
        result.push_back(subStr);
 
        first = last + 1;
        last = str.find_first_of(del, first);
 
        if (last == std::string::npos) {
            last = str.size();
        }
    }
 
    return result;
}

int main(){
    int w,n;
    cin >> w >> n;
    vector<int> N(w);
    for(int i=0; i<w; i++) N[i]=i;
    // rep(i,w) cout << N[i]; cout << endl;
    // cout << endl;
    rep(i,n){
        string s;
        cin >> s;
        vector<string> A = split(s, ',');
        string a = A[0], b = A[1];
        // cout << a << " " <<b << endl;
        int tmp=N[stoi(a)-1];
        N[stoi(a)-1]=N[stoi(b)-1];
        N[stoi(b)-1]=tmp;

    }
    rep(i,w) cout << N[i]+1 << endl;
    return 0;
}

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

#define rep(i,n) for(int i = 0; i < n; i++)
#define ll long long
#define EPS 1.0e-8
#define MAX_N 100
typedef pair<int,int> Pii;
typedef pair<int,int> Pis;
const double PI=acos(-1);

int main(){
	int w, n;
	int stage[30];
	int a, b;
	cin >> w >> n;
	rep(i,w) stage[i] = i+1;

	rep(i,n){
		scanf("%d,%d",&a,&b);	
		stage[a-1] ^= stage[b-1];
		stage[b-1] ^= stage[a-1];
		stage[a-1] ^= stage[b-1];
	}

	rep(i,w)	cout << stage[i] << endl;
}

C++: #include <stdio.h>
#include <string.h>

int now[30];

int main()
{
	int w,n;
	scanf("%d%d",&w,&n);
	for(int i = 0; i < w; i++)
	{
		now[i] = i + 1;
	}
	for(int i = 0; i < n; i++)
	{
		int a,b;
		scanf("%d%d",&a,&b);
		int w = now[a - 1];
		now[a - 1] = now[b - 1];
		now[b - 1] = w;
	}
	for(int i = 0; i < w; i++)
	{
		printf("%d\n",now[i]);
	}
	return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <cstdio>
#include <string>
#define rep(x,to) for(x=0;x<to;x++)
#define rep2(x,from,to) for(x=from;x<to;x++)

using namespace std;




int main(void){

int ww,w[32];	
int nn,ra,rb,i;
char cn;
	cin >> ww;
	cin >> nn;
	
	rep(i,ww) w[i]=i+1;
	rep(i,nn){
		cin >> ra >> cn >> rb;
		swap(w[ra-1],w[rb-1]);
	}
	rep(i,ww) cout << w[i] << endl;
	return 0;
}

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

int main(){
  int w,n,i,j;
  int f,t;
  int value[31];
  for(i=1;i<31;i++){
    value[i]=i;
  }
  string str;
  cin >> w >> n;
  for(i=0;i<n;i++){
    cin >> str;
    if(str[1]==','){
      f = str[0] - '0';
      if(str.size()==3) t = str[2] - '0';
      else t = (str[2] - '0') * 10 + str[3] - '0';
    }else{
      f = (str[0] - '0') * 10 +  str[1] - '0';
      if(str.size()==4) t = str[3] - '0';
      else t = (str[3] - '0') * 10 + str[4] - '0';
    }
    int buf=value[f];
    value[f]=value[t];
    value[t]=buf;
  }
  for(i=1;i<w+1;i++){
    cout << value[i] << endl;
  }
}

C++: /*
　　　　 ∧＿∧　にっぽんちゃちゃちゃ
　／＼（　・∀・）／ヽ
（ ●　と　　　つ　● ）　にっぽんちゃちゃちゃ
　＼/⊂、 ノ　　＼ノ
　　　　　し'
*/
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define repone(i,n) for(int i=1;i<(int)(n);++i)
#define repo(i,o,n) for(int i=o;i<(int)(n);++i)
#define Rep(j,n) for(int j=0;j<(int)(n);++j)
#define Repo(j,o,n) for(int j=o;j<(int)(n);++j)
#define Repone(j,n) for(int j=1;j<(int)(n);++j)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define int long long
#define MOD 1000000007
#define INF 9223372036854775807

signed main()
{
int x=0,y=0,z=0,w=0,n=0;
string b;
std::cin >> x;
int a[x+1];
rep(i,x+1){
  a[i]=i;
}
std::cin >> y;
rep(i,y){
scanf("%d,%d",&z,&w);
swap(a[z],a[w]);
}
repone(i,x+1){
  std::cout << a[i] << '\n';
}
}

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

int main()
{
	int line,n;
	char c;
	cin >> line;
	cin >> n;

	int values[31];
	for(int i=0;i<line;i++)
	{
		values[i] = i+1;
	}

	for(int i=0;i<n;i++)
	{
		int a,b;
		cin >> a >> c >> b ;

		int value = values[a-1];
		values[a-1] = values[b-1];
		values[b-1] = value;
	}

	for(int i=0;i<line;i++)
	{
		cout << values[i] << endl; 
	}
	return 0;
}