Submission #338171

#	Time	Username	Problem	Language	Result	Execution time	Memory
338171		juggernaut	Skyline (IZhO11_skyline)	C++14	100 / 100	194 ms	49604 KiB

skyline

#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;
}

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