Codeforces 876C Classroom Watch
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题目大意:题目的范围是1000000000,每个数字加起来的和最大的数是99999999,可以直接从n-81的地方开始枚举
#include<iostream>#include<vector>using namespace std;int main(){int n;cin>>n;vector<int> vec;for(int i=81;i>=0;i--){if(n-i<0) continue;int res=n-i;int tmp=res;int ans=0;while(tmp){ans+=tmp%10;tmp/=10;}if(ans+res==n) vec.push_back(res);}cout<<vec.size()<<endl;for(int i=0;i<vec.size();i++) cout<<vec[i]<<' ';}
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