Rebranding

#include <stdio.h>

char N[200005];

int main(void){
    int n,m;
    char x,y;

    scanf("%d %d",&n,&m);
    scanf("%s",N);
    for(int i=0;i<m;i++){
        scanf(" %c %c",&x,&y);
        if(x==y) continue;
        for(int j=0;j<n;j++){
            if(N[j]==x){
                N[j]=y;
            }
            else if(N[j]==y){
                N[j]=x;
            }
        }
    }
    printf("%s\n",N);

    return 0;
}