# include <stdlib.h>
# include <stdio.h>

char * read()
{
    int sz = 8, i = 0;
    char * buf = malloc(sizeof(char)*sz);
    for(int c = fgetc(stdin); c != EOF && c != '\n'; c = fgetc(stdin))
    {
        buf[i++] = c;
        if (i == sz)
        {
            sz *= 2;
            buf = realloc(buf,sz);
        }
    }
    buf[i] = 0;
    return buf;
}

int main()
{

    char * buf = read();
    int len = strlen(buf);

    printf("%d\n",len);

}