Submission #338171

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
338171	2020-12-22 15:35:40	juggernaut	Skyline (IZhO11_skyline)	C++14	100 / 100	194 ms	49604 KiB

skyline

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#include <bits/stdc++.h>
#define INF 1000000000
using namespace std;
const int N=303;
const int M=202;
int dp[N][M][M],arr[N],n;
int rec(int pos,int a1,int a2){
  if(pos>=n)
    return min(a1,a2)*5+(max(a1,a2)-min(a1,a2))*3;
  int &ret=dp[pos][a1][a2];
  if(~ret)
    return ret;
  ret=INF;
  int val=min(arr[pos],min(a1,a2));
  if(val==a2)
    ret=min(ret,rec(pos+1,arr[pos]-val,a1-val)+val*7);  
  if(a1 and a2)
    ret=min(ret,rec(pos,a1-1,a2-1)+5);
  if(a2)
    ret=min(ret,rec(pos,a1,a2-1)+3);
  return ret;
  //a2 a1 a[pos]
}
int main(){
  scanf("%d",&n);
  for(int i=0;i<n;i++)
    scanf("%d",arr+i);
  memset(dp,-1,sizeof dp);
  printf("%d\n",rec(2,arr[1],arr[0]));
  return 0;
 
 
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Compilation message (stderr)

skyline.cpp: In function 'int main()':
skyline.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   25 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
skyline.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |   scanf("%d",arr+i);
      |   ~~~~~^~~~~~~~~~~~

• Subtask 1: 100 / 100