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- #include <iostream>
- #include <vector>
- using namespace std;
- int n;
- int map[100001];
- int main() {
- cin>>n;
- for(int i=1; i<=n; i++) {
- map[i]=i;
- for(int j=1; j*j<=i; j++) {
- if(map[i]>map[i-j*j]+1) {
- map[i]=map[i-j*j]+1;
- }
- }
- }
- cout<<map[n]<<endl;
- }
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