题解

#include<bits/stdc++.h> 
using namespace std;int main(){string a;getline(cin,a);int sum=0;for(int i=0;i<a.size();i++){if(a[i]!=' '){sum++;}else if(a[i]==' '&&a[i-1]!=' '){cout<<sum<<',';sum=0;continue;}if(i==a.size()-1){cout<<sum;}}return 0;}