题解 | #小乐乐与字符串#
小乐乐与字符串
https://www.nowcoder.com/practice/e09de1fc11db4a438cf8f0668848660d
#include <stdio.h>
int main()
{
char str[100000] = { 0 };
scanf("%s", str);
char *p = str;
long long int c = 0, ch = 0, chn = 0;
while (*p)
{
if (*p == 'C')
{
c++;
}
else if (*p == 'H')
{
ch += c;
}
else if (*p == 'N')
{
chn += ch;
}
p++;
}
printf("%lld", chn);
}
