Submission #100980

#	Time	Username	Problem	Language	Result	Execution time	Memory
100980		KLPP	새로운 문제 (COCI19_akvizna)	C++14	65 / 130	270 ms	43528 KiB

Main

#include<bits/stdc++.h>

using namespace std;
typedef long long int lld;
double DP[3001][3001];
//int oper;
void compute(int level,int lo_i,int hi_i, int lo_j, int hi_j){
  if(lo_i>hi_i)return;
  //oper+=hi_j-max(lo_j,level-1)+1;
  //cout<<level<<" "<<lo_i<<" "<<hi_i<<" "<<lo_j<<" "<<hi_j<<endl;
  int mid=(lo_i+hi_i)/2;
  DP[mid][level]=-1;
  int opt=-1;
  for(int i=max(lo_j,level-1);i<=hi_j && i<mid;i++){
    if(DP[mid][level]<DP[i][level-1]+(double)(mid-i)/(mid)){
      DP[mid][level]=DP[i][level-1]+(double)(mid-i)/(mid);
      opt=i;
    }
    //DP[mid][level]=max(DP[mid][level],DP[i][level-1]+(double)(mid-i)/(mid));
  }
  //cout<<lo_i<<" "<<mid<<" "<<hi_i<<" "<<lo_j<<" "<<opt<<" "<<hi_j<<endl;
  compute(level,lo_i,mid-1,lo_j,opt);
  compute(level,mid+1,hi_i,opt,hi_j);
}
int main(){
  int n,k;
  scanf("%d %d",&n,&k);
  for(int i=0;i<=n;i++)DP[i][0]=0;
  /*for(int i=1;i<=n;i++){
     for(int j=1;j<=k && j<=i;j++){
      DP[i][j]=0;
      //cout<<i<<" A  "<<j<<endl;
      for(int l=j-1;l<i;l++){
	double d=(double)(i-l)/i;
	//cout<<l<<" "<<d<<endl;
	DP[i][j]=max(DP[i][j],DP[l][j-1]+d);
      }
      
      //printf("%lf ",DP[i][j]);
      //cout<<endl;
    }//printf("\n");
  }*/
  
  for(int i=1;i<=k;i++){//oper=0;
    compute(i,i,n,0,n);
    //cout<<i<<" "<<oper<<endl;
  }
  /*for(int i=0;i<=k;i++){
    for(int j=i;j<=n;j++){
      printf("%lf ",DP[j][i]);
    }printf("\n");
  }*/
  printf("%.10lf\n",DP[n][k]);
  return 0;
}

Compilation message (stderr)

akvizna.cpp: In function 'int main()':
akvizna.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&n,&k);
   ~~~~~^~~~~~~~~~~~~~~

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