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#include <iostream> #include <vector> using namespace std; int dp[100005]; int main() { int s; int E; cin>>s>>E; vector<int>v; vector<int>p; for(int i=0; i<100005; i++){ dp[i]=2e9; } for(int i=1; i<=100000; i++){ vector<int>v; int n=i; int n1=0; while(n>0){ int a=0; a=n%10; n/=10; v.push_back(a); } for(int j=0; j<=v.size()-1; j++){ n1*=10; n1+=v[j]; } if(n1==i){ p.push_back(n1); } } dp[s]=0; for(int i=s; i<=E; i++){ for(int j=0; j<p.size(); j++){ if((p[j]<i)and(i+p[j]<=E)){ dp[p[j]+i]=min(dp[p[j]+i], dp[i]+1); } } } cout<<dp[E]; return 0; }
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