yukicoder No.115 遠足のおやつ

yuki115.cpp

#include<iostream>
#include<vector>

using namespace std;
int memo[101][1001][11];
int N, D, K;
vector<int> ans;
vector<int> mians;

int rec(int i, int s, int m){

   if(memo[i][s][m]!=-1) return memo[i][s][m];
   if(m==K){
      if(s==D){
         if(mians.size()==0) mians=ans;
         return 1;
      }else{
         return 0;
      }
   }
   if(i==N){
      return 0;
   }
   int ret=0;
   ans.push_back(i+1);
   int tukau=rec(i+1, s+(i+1), m+1);
   ans.pop_back();
   int tukawanai=rec(i+1, s, m);
   ret=(tukau||tukawanai);
   return memo[i][s][m]=ret;
}

int main(){

   cin>> N>> D>> K;

   fill((int*)memo, (int*)memo+101*1001*11, -1);
   if(rec(0, 0, 0)){
      for(int i=0; i<mians.size(); i++){
         if(i>0){
            cout<< " ";
         }
         cout<< mians[i];
      }
      cout<< endl;
   }else{
      cout<< -1<< endl;
   }

   return 0;
}