C(clang 3.9) 解法, 执行用时: 2ms, 内存消耗: 496K, 提交时间: 2020-08-05 21:01:36

#include<stdio.h>
#include<string.h>
#include<math.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
char s[200000];
long long len,i;
long long max(long long a,long long b){
	return a>b?a:b;
}
long long fun(){
	long long t=0,ans=0;
	for(i;i<len;i++){
		long long k=0;
		while(s[i]>='0'&&s[i]<='9'){
			k=k*10+s[i]-'0';
			i++;
		}
		ans+=t*max(k,1);
		t=0;
		if(s[i]=='H')t=1;
		else if(s[i]=='O')t=17;
		else if(s[i]=='C')t=13;
		if(s[i]=='('){
			i++;
			t=fun();
		}
		else if(s[i]==')')break;
	}
	ans+=t;
	return ans;
}
int main(){
	gets(s);
	len=strlen(s);
	printf("%lld",fun());
	return 0;
}

C++14(g++5.4) 解法, 执行用时: 4ms, 内存消耗: 548K, 提交时间: 2020-09-30 20:43:07

#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
char a[100005];
int b[100];
int i=0;
int t;
ll fun()
{
	ll n=0;
	ll x=0;
	
	for(i;i<t;i++)
	{
		ll s=0;
		while(a[i]>='0'&&a[i]<='9'){
			s=s*10+(a[i]-'0');
			i++;
		}
		n=n+x*max(s,1LL);;
		x=0;
		if(a[i]=='O')x=17;
		if(a[i]=='H')x=1;
		if(a[i]=='C')x=13;
		if(a[i]=='(')
		{
			i++;
			x=fun();
		}
		else if(a[i]==')')break;
		
	}
	n=n+x;
	return n;
}
int main()
{

	scanf("%s",a);
	t=strlen(a);
	cout<<fun()<<endl;
	
	
}

C++11(clang++ 3.9) 解法, 执行用时: 8ms, 内存消耗: 584K, 提交时间: 2020-08-05 18:35:07

#include<iostream>
using namespace std;
typedef long long ll;
string s;
ll i,n;
ll solve(){
	ll ans=0,ji=0;
	for(;i<n;i++){
		ll xs=0;
		while(s[i]>='0'&&s[i]<='9'){
			xs=xs*10LL+s[i]-'0';
			i++;
		}
		ans+=ji*max(xs,1LL);
		ji=0;
		if(s[i]=='H')  ji=1;
		if(s[i]=='O')  ji=17;
		if(s[i]=='C')  ji=13;
		if(s[i]=='('){
			i++;
			ji=solve();
		}
		else if(s[i]==')')  break;
	}
	ans+=ji;
	return ans;
}
int main(){
	cin>>s;
	n=s.size();
	cout<<solve()<<endl;
	return 0;
}

Python3 解法, 执行用时: 496ms, 内存消耗: 54492K, 提交时间: 2022-06-13 16:37:00

s=input()

i=1
d=set('0123456789')
while i<len(s):
    if s[i] in d and s[i-1] not in d:
        s = s[:i]+'*'+s[i:]
        i+=2
    else:
        i+=1
        
s=s.replace('H','+1').replace('C','+13').replace('O','+17').replace('(','+(')
print(eval(s))