Submission #845221


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#include<iostream>
#include<cstring>
using namespace std;
int n,a[111111];
int dp[111111][2];
long long int res;
void upd(int&x,int y){
	if(x==-1 || x<y)x=y;
}
int main(){
	cin>>n;
	res = 0;
	for(int i=0; i<n; i++){
		cin>>a[i];
		if(a[i]){
			if(a[i]%2){
				res += (a[i] - 1)/2;
				a[i] = 1;
			}else{
				res += (a[i] - 2)/2;
				a[i] = 2;
			}
		}
	}
	memset(dp,-1,sizeof(dp));
	dp[0][0] = 0;
	int o = -1;
	for(int i=0; i<=n; i++)
		for(int j=0; j<2; j++)
			if(dp[i][j]!=-1){
				if(i == n)upd(o, dp[i][j]);else{
					upd(dp[i+1][a[i]%2],dp[i][j]+a[i]/2);
					if(a[i]>=1 && j>=1)
						upd(dp[i+1][a[i]-1],dp[i][j]+1);
				}
			}
	cout << res + o << endl;
	return 0;
}

Submission Info

Submission Time
Task B - Simplified mahjong
User maryanna2016
Language C++14 (GCC 5.4.1)
Score 400
Code Size 713 Byte
Status AC
Exec Time 91 ms
Memory 1536 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 2
AC × 24
Set Name Test Cases
Sample s1.txt, s2.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, s1.txt, s2.txt
Case Name Status Exec Time Memory
01.txt AC 85 ms 1536 KB
02.txt AC 85 ms 1536 KB
03.txt AC 89 ms 1536 KB
04.txt AC 65 ms 1536 KB
05.txt AC 65 ms 1536 KB
06.txt AC 70 ms 1536 KB
07.txt AC 77 ms 1536 KB
08.txt AC 78 ms 1536 KB
09.txt AC 84 ms 1536 KB
10.txt AC 85 ms 1536 KB
11.txt AC 43 ms 1536 KB
12.txt AC 91 ms 1536 KB
13.txt AC 86 ms 1536 KB
14.txt AC 85 ms 1536 KB
15.txt AC 43 ms 1536 KB
16.txt AC 85 ms 1536 KB
17.txt AC 85 ms 1536 KB
18.txt AC 5 ms 1152 KB
19.txt AC 5 ms 1152 KB
20.txt AC 5 ms 1152 KB
21.txt AC 5 ms 1152 KB
22.txt AC 5 ms 1152 KB
s1.txt AC 5 ms 1152 KB
s2.txt AC 5 ms 1152 KB