Submission #1203431

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203431		tritranminh2808	Art Exhibition (JOI18_art)	C++20	0 / 100	0 ms	320 KiB

art

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int pp=5e5+5;
int a[pp],b[pp],n;
struct pl{
	int val,s,maxx,minn;
};
pl dp[2][pp];
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for(int i=1;i<=n;i++) cin >> a[i] >> b[i];
	dp[1][1].val=b[1];
	dp[1][1].minn=a[1];
	dp[1][1].maxx=a[1];
	dp[1][1].s=b[1];
	dp[0][1].val=-1e18;
	dp[0][1].minn=1e18;
	dp[0][1].maxx=-1e18;
	dp[0][1].s=-1e18;
	for(int i=2;i<=n;i++){
		int prmax=0,prmin=0,prs=0,prval=0;
		if(dp[0][i-1].val<dp[1][i-1].val){
			prval=dp[1][i-1].val;
			prmin=dp[1][i-1].minn;
			prmax=dp[1][i-1].maxx;
			prs=dp[1][i-1].s;
		}
		else{
			prval=dp[0][i-1].val;
			prmin=dp[0][i-1].minn;
			prmax=dp[0][i-1].maxx;
			prs=dp[0][i-1].s;
		}
		dp[0][i].val=prval;
		dp[0][i].maxx=prmax;
		dp[0][i].minn=prmin;
		dp[0][i].s=prs;
		int cmax=0,cmin=0;
		if(a[i]>prmax) cmax=a[i];
		else cmax=prmax;
		if(a[i]<prmin) cmin=a[i];
		else cmin=prmin;
		dp[1][i].val=prs+b[i]-cmax+cmin;
		dp[1][i].minn=cmin;
		dp[1][i].maxx=cmax;
		dp[1][i].s=prs+b[i];
	}
	cout << max(dp[0][n].val,dp[1][n].val);
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 50