Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
	sc.Scan()
	lines, _ := strconv.Atoi(sc.Text())
	l := make([]int, lines)
	for i := 0; i < lines; i++ {
		l[i] = i + 1
	}

	sc.Scan()
	rows, _ := strconv.Atoi(sc.Text())
	for i := 0; i < rows; i++ {
		sc.Scan()
		s := strings.Split(sc.Text(), ",")
		a, _ := strconv.Atoi(s[0])
		b, _ := strconv.Atoi(s[1])

		l[a-1], l[b-1] = l[b-1], l[a-1]
	}
	for _, j := range l {
		fmt.Println(j)
	}
}

C++: #include<iostream>

int listen_lineCount();
void listen_path(int &from,int &to);

class Lots
{
private:
	int *start_goal;
	int verLineNum;
public:
	Lots(const int lineCount);
	~Lots();
	
	void draw_line(const int from,const int to);
	void echo_goalNums();
};

//-------------------------main--------------------------------

int main()
{
	int ver_lineCount=listen_lineCount();
	Lots inst_lot=Lots(ver_lineCount);
	
	int hor_lineCount=listen_lineCount();
	
	int from,to;
	for(int roop=0;roop<hor_lineCount;roop++)
	{
		listen_path(from,to);
		inst_lot.draw_line(from,to);
	}
	
	inst_lot.echo_goalNums();
	return 0;
}

//--------------------------------------------------------------

Lots::Lots(const int lineCount)
{
	verLineNum=lineCount;
	start_goal=new int(lineCount+1);
	
	for(int roop=1;roop<=lineCount;roop++)
	{
		start_goal[roop]=roop;
	}
}

Lots::~Lots()
{
	delete start_goal;
}

void Lots::draw_line(const int from,const int to)
{
	int swap=start_goal[from];
	start_goal[from]=start_goal[to];
	start_goal[to]=swap;
}

void Lots::echo_goalNums()
{
	using namespace std;
	
	for(int roop=1;roop<=verLineNum;roop++)
	{
		cout<<start_goal[roop]<<endl;
	}
}


int listen_lineCount()
{
	using namespace std;
	
	int lineCount;
	cin>>lineCount;
	
	return lineCount;
}

void listen_path(int &from,int &to)
{
	using namespace std;
	
	char delim;//カンマ区切り
	
	cin>>from>>delim>>to;
}

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>
#define for1(be,end,z) for(z=be;z<end;z++)
#define for2(end,z) for1(0,end,z)

using namespace std;
int g_lost[30];
void init()
{
    int i;
    for2(30,i)
    {
        g_lost[i]=i+1;
    }
}
void swap(int a,int b)
{
    int tp;
    tp=g_lost[a-1];
    g_lost[a-1]=g_lost[b-1];
    g_lost[b-1]=tp;
}
int main()
{
    init();
    int w,n,i;
    cin>>w;
    cin>>n;
    while(n--)
    {
        char a,b,p;
        cin>>a>>p>>b;
        swap(a-0x30,b-0x30);
    }
    for2(w,i)
    {
        cout<<g_lost[i];
        if(i!=w)cout<<endl;
    }
    return 0;
}

C++: #define _USE_MATH_DEFINES
#include<iostream>
#include<string>
#include<queue>
#include<cmath>
#include<map>
#include<set>
#include<list>
#include<iomanip>
#include<vector>
#include<random>
#include<functional>
#include<algorithm>
#include<stack>
#include<cstdio>
#include<bitset>
#include<unordered_map>
#include<climits>
#include<fstream>
using namespace std;
///////////////////library zone!!!!!!!!!!!!!!!!!!!!!!!!!!!!
typedef long long ll;
typedef long double ld;
#define all(a) (a).begin(),(a).end()
#define EPS (1e-5);
const ll Mod = 1000000007;
const ll mod = 998244353;
struct H {
	ll x, y;
	bool operator<(const H &b) const {
		if (x != b.x) return x < b.x;
		return y < b.y;
	}
	bool operator>(const H &b) const {
		if (x != b.x) return x > b.x;
		return y > b.y;
	}
	bool operator==(const H &b) const { return x == b.x&&y == b.y; }
	bool operator!=(const H &b) const { return (*this) != b; }
};
struct P {
	ll pos, cost;
	bool operator<(const P &b) const { return cost < b.cost; }
	bool operator>(const P &b) const { return cost > b.cost; }
};
struct B {
	ll to, cost;
};
struct E {
	ll from, to, cost;
	bool operator<(const E &b) const { return cost < b.cost; }
	bool operator>(const E &b) const { return cost > b.cost; }
};
template<typename T, typename U>
void chmin(T &a, U b) {
	if (a > b) a = b;
}
template<typename T, typename U>
void chmax(T &a, U b) {
	if (a < b) a = b;
}
template<typename T>
T max_0(T a) {
	if (a < 0) return 0;
	return a;
}
template<typename T>
T min_0(T a) {
	if (a > 0) return 0;
	return a;
}
ll read() {
	ll u;
	ll k = scanf("%lld", &u);
	return u;
}
ll gcd(ll i, ll j) {
	if (i > j) swap(i, j);
	if (i == 0) return j;
	return gcd(j%i, i);
}
ll mod_pow(ll x, ll n, ll p) {
	ll res = 1;
	while (n > 0) {
		if (n & 1) res = res * x % p;
		x = x * x % p;
		n >>= 1;
	}
	return res;
}//x^n%p
const ll Inf = 3023372036854775807;
const int inf = 1500000000;
#define int long long
//----------------------------------------------------
class Vec2 {
public:
	ld x, y;
	Vec2() { x = 0, y = 0; }
	Vec2(ld x, ld y) :x(x), y(y) {}
	ld length() {
		return sqrt(x*x + y * y);
	}
	void normal() {
		ld len = this->length();
		if (len == 0) return;
		x /= len, y /= len;
	}
	Vec2 operator+(Vec2 vec) {
		return Vec2(x + vec.x, y + vec.y);
	}
	Vec2 operator-(Vec2 vec) {
		return Vec2(x - vec.x, y - vec.y);
	}
	Vec2 operator*(int cons) {
		return Vec2(x*cons, y*cons);
	}
	int operator*(Vec2 vec) {
		return x * vec.x + y * vec.y;
	}
	int operator%(Vec2 vec) {
		return x * vec.y - y * vec.x;
	}
};
int dot(Vec2 a, Vec2 b) {
	return a.x*b.x + a.y*b.y;
}
int cross(Vec2 a, Vec2 b) {
	return a.x*b.y - a.y*b.x;
}
class Vec3 {
public:
	ld x, y, z;
	Vec3() { x = 0, y = 0, z = 0; }
	Vec3(ld x, ld y, ld z) :x(x), y(y), z(z) {}
	ld length() {
		return sqrt(x*x + y * y + z * z);
	}
	void normal() {
		ld len = this->length();
		if (len == 0) return;
		x /= len, y /= len, z /= len;
	}
	Vec3 operator+(Vec3 vec) {
		return Vec3(x + vec.x, y + vec.y, z + vec.z);
	}
	Vec3 operator-(Vec3 vec) {
		return Vec3(x - vec.x, y - vec.y, z - vec.z);
	}
	Vec3 operator*(int cons) {
		return Vec3(x*cons, y*cons, z*cons);
	}
	int operator*(Vec3 vec) {
		return x * vec.x + y * vec.y + z * vec.z;
	}
};
int dot(Vec3 a, Vec3 b) {
	return a.x*b.x + a.y*b.y + a.z*b.z;

}
class Line {
public:
	Vec2 from, to;
	Line(Vec2 from, Vec2 to) :from(from), to(to) {}
};
Line getPerpendicularBisector(Line line) {
	int cx = (line.from.x + line.to.x) / 2, cy = (line.from.y + line.to.y) / 2;
	Vec2 p = Vec2(cx + (line.from.y - line.to.y), cy + (line.to.x - line.from.x));
	return Line(Vec2(cx, cy), p);
}
int a[200];
signed main() {
	int w, n;
	cin >> w >> n;
	for (int i = 1; i <= w; i++) a[i] = i;
	for (int i = 0; i < n; i++) {
		int x, y;
		scanf("%lld,%lld", &x, &y);
		swap(a[x], a[y]);
	}
	for (int i = 1; i <= w; i++) cout << a[i] << endl;
}

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

int main(){
	int w, n, a, b;
	while(cin>>w){
		vector<pair<int, int> > all;
		cin>>n;
		for(int i=0; i<n; i++){
			scanf("%d,%d", &a, &b);
			all.push_back(pair<int, int>(a, b));
		}
		reverse(all.begin(), all.end());
		for(int i=1; i<=w; i++){
			int ima = i;
			for(int j=0; j<n; j++){
				if(all[j].first == ima) ima = all[j].second;
				else if(all[j].second == ima) ima = all[j].first;
			}
			cout<<ima<<endl;
		}
	}
}

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

int main(){
    int w,n;
    cin>>w>>n;
    int vec[30];
    for(int i=0;i<w;i++)
        vec[i]=i+1;
    for(int i=0;i<n;i++){
        int x,y;char m;
        cin>>x>>m>>y;
        swap(vec[x-1],vec[y-1]);
    }
    for(int i=0;i<w;i++)
        cout<<vec[i]<<endl;
}