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[8001]={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);
}
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