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yukicoder No.32 貯金箱の憂鬱 解説

Last updated at Posted at 2024-07-24

問題文

解説

まずは、使う小銭・札を見てみよう。
・$1000mod100=0$
・$100mod25=0$
・$25mod1=0$
つまり、この問題は貪欲法が使える
できるだけ小銭の数を小さくするため、下から両替をできるだけする。
最終的に札は数えないことに注意。

解答例

#include <bits/stdc++.h>
using namespace std;

int main(){
  int l,m,n;cin>>l>>m>>n;
  m+=n/25;
  n%=25;
  l+=m/4;
  m%=4;
  l%=10;
  cout<<n+m+l<<endl;
}
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