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Submission #152118

# Submission time Handle Problem Language Result Execution time Memory
152118 2019-09-06T14:22:22 Z HungAnhGoldIBO2020 Homecoming (BOI18_homecoming) C++14
0 / 100
 53 ms 23820 KB 
#include "homecoming.h"
#include<iostream>
#include<vector>
using namespace std;
const int n=2e6+2;
const long long inf=1e18+2;
long long dp[n][2][2],sum[n];			//co chon khong , loai nao
long long solve(int N,int K,int* A,int* B){
	int i;
	for(i=0;i<N;i++){
		sum[i]=B[i];
		if(i){
			sum[i]+=sum[i-1];
		}
		dp[i][0][0]=-inf;
		dp[i][1][0]=-inf;
		dp[i][0][1]=-inf;
		dp[i][1][1]=-inf;
	}
	dp[0][0][0]=0;
	dp[0][1][1]=A[0]-sum[K-1];
//	cout<<dp[0][1][1]<<endl;
	for(i=1;i<N;i++){
		dp[i][0][0]=max(dp[i-1][0][0],dp[i-1][1][0]);
		dp[i][0][1]=max(dp[i-1][0][1],dp[i-1][1][1]);
		if(i+K-1<N){
			dp[i][1][0]=min(dp[i-1][1][0]+A[i]-B[i+K-1],dp[i-1][0][0]+A[i]-sum[i+K-1]+sum[i-1]);
			dp[i][1][1]=max(dp[i-1][1][1]+A[i]-B[i+K-1],dp[i-1][0][1]+A[i]-sum[i+K-1]+sum[i-1]);
		}
		else{
			dp[i][1][0]=min(dp[i-1][1][0]+A[i]-B[i+K-1-N],dp[i-1][0][0]+A[i]-sum[i+K-1-N]-sum[N-1]+sum[i-1]);
			dp[i][1][1]=max(dp[i-1][1][1]+A[i],dp[i-1][0][1]+A[i]-sum[N-1]+sum[i-1]);
		}
		//cout<<dp[i][1][1]<<endl;
	}
	//cout<<dp[n-1][1][1]<<endl;
	return max(max(dp[N-1][0][1],dp[N-1][1][0]),max(dp[N-1][1][1],dp[N-1][0][0]));
}
//signed main(){
//	cout<<solve(3,2,[40, 80, 100],[140, 0, 20]);
//}

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Incorrect 2 ms 376 KB Output isn't correct

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Incorrect 2 ms 376 KB Output isn't correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 53 ms 23820 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Incorrect 2 ms 376 KB Output isn't correct