C++ :

#include<bits/stdc++.h>
using namespace std;
string s;
long long ans;
int main()
{
	cin>>s;
	int len=s.size();
	for(int i=0;i<len;)
	{
		if(s[i]>='0' && s[i]<='9')
		{
			long long sum=s[i]-'0';
			for(int j=i+1;;)
			{
				if(j==len) {i=len,ans+=sum;break;}//防止最后一位是数字 
				if(s[j]>='0' && s[j]<='9') {sum=sum*10+(s[j]-'0');j++;}
				else {ans+=sum,i=j+1;break;}
			}
		}
		else i++;
	}
	cout<<ans;

	return 0;
	 
}