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Copy pathEncoding_Message.c
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Encoding_Message.c
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#include <stdio.h>
int main(void) {
int t;
scanf("%d",&t);
while(t--)
{
int n;
scanf("%d",&n);
char a[n];
scanf("%s",a);
for (int i=0; i<n; i++)
{
int temp;
if ((n%2)!=0)
{
if (i==(n-1)) break;
else if ((i%2)==0)
{
temp=a[i+1];
a[i+1]=a[i];
a[i]=temp;
}
}
else
{
if ((i%2)==0)
{
temp=a[i+1];
a[i+1]=a[i];
a[i]=temp;
}
}
}
int b[n];
for (int i=0; i<n; i++)
{
b[i]=97-a[i]+122;
}
char s[n];
for (int i=0; i<n; i++)
{
s[i]=b[i];
printf("%c",s[i]);
}
printf("\n");
}
return 0;
}