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Submission #69692

# Submission time Handle Problem Language Result Execution time Memory
69692 2018-08-21T11:45:34 Z khohko Homecoming (BOI18_homecoming) C++17
0 / 100
 1000 ms 30236 KB 
#include<bits/stdc++.h>
#include "homecoming.h"
using namespace std;
#define ll long long
#define fr first
#define sc second
#define pb push_back
#define ARRS ((ll)(4e6+100))
#define MAX ((ll)(1e12+100))


ll a[ARRS];
ll b[ARRS];
ll s[ARRS];
ll dp[ARRS][2];

ll sum(ll l,ll r){
	return s[r]-s[l-1];
}

long long solve(int n, int K, int *B, int *A){
	ll pas=0,p=0;
	for(int i=1; i<=n; i++){
		a[i]=A[i-1];
		a[i+n]=A[i-1];

		b[i]=B[i-1];
		b[i+n]=B[i-1];

		p-=a[i];
		p+=b[i];
	}
	for(int i=1; i<=2*n; i++)s[i]=s[i-1]+a[i];
	pas=max(pas,p);
	vector<ll> ps;
	for(int i=0; i<n; i++)
		if(A[i]>=B[i])ps.pb(i);
	pair<ll,ll> mn={MAX,MAX};
	for(int i=1; i<=2*n; i++){
		ll sm=0;
		for(int j=i; abs(i-j)<n&&j<=2*n; j++){
			sm-=A[j]-B[j];
			mn=min(mn,{sm,j-1});
		}
	}

	ll s=mn.sc;
	//s++;
	s%=n;
	dp[0][0]=0;
	dp[0][1]=-MAX;
	for(int i=1; i<=n; i++){
		dp[i][0]=dp[i-1][0];
		dp[i][1]=-MAX;
		if(i>=K){
			dp[i][1]=max(dp[i][1],dp[i-K][0]+b[i-K+1+s]-sum(i-K+1+s,i+s));
			dp[i][1]=max(dp[i][1],dp[i-1][1]+b[i-K+1+s]-a[i+s]);
		}
		dp[i][0]=max(dp[i][0],dp[i][1]);
		//cout<<dp[i][0]<<" "<<dp[i][1]<<endl;
	}
	pas=max(pas,dp[n][0]);
	//cout<<endl;

	return pas;
}

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 4 ms 488 KB Output is correct
3 Correct 3 ms 488 KB Output is correct
4 Correct 3 ms 488 KB Output is correct
5 Incorrect 4 ms 596 KB Output isn't correct

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 4 ms 488 KB Output is correct
3 Correct 3 ms 488 KB Output is correct
4 Correct 3 ms 488 KB Output is correct
5 Incorrect 4 ms 596 KB Output isn't correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1054 ms 30236 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 4 ms 488 KB Output is correct
3 Correct 3 ms 488 KB Output is correct
4 Correct 3 ms 488 KB Output is correct
5 Incorrect 4 ms 596 KB Output isn't correct