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    General

    2:1 text packing

    Using utf16 strings, you can compress prints that output constant strings, or prints that use constant strings as arguments, to take half the characters.

    Spoiler

    Compressor

    #import<cstring>
    #import<clocale>
    char str[]="STRING";
    int i;
    int main(){
    	for(setlocale(LC_ALL, "en_US.UTF-8");i<strlen(str);i+=2)
    		__builtin_printf("%C",str[i]+(str[i+1]<<8));
    }
    

    Decompressor

    Note: compared to just printing via __builtin_printf("..."), the string must be over 13 characters to get a benefit. However, if your print was already of the form __builtin_printf("...%s",...,"..."), your string only needs to be over 3 characters to get a benefit.

    int main(){__builtin_printf("%s",u"...");}
    

    Output

    If you are familiar with or translating from C: