Submission #12799

#	Time	Username	Problem	Language	Result	Execution time	Memory
12799		woqja125	전선 연결하기 (GA9_wire)	C++98	0 / 100	0 ms	8120 KiB

wire

#include<stdio.h>
int d[600001];
int l[300001];
int ans[300001];
int a[300001], at=-1;
int b[300001], bt=-1;
int main()
{
	int n, i;
	int t;
	a[++at] = b[++bt] = 10000000;
	scanf("%d", &n);
	for(i=1; i<=2*n; i++)
	{
		scanf("%d", d+i);
		l[d[i]] = i;
	}
	for(i=1; i<=2*n; i++)
	{
		t = l[d[i]];
		if(t == i) continue;
		while(a[at] <= i) at--;
		while(b[bt] <= i) bt--;
		if(t > a[at] && t > b[bt])
		{
//			while(1);
			printf("IMPOSSIBLE");
			return 0;
		}
		if(t <= a[at] && (a[at] >= b[bt] || b[bt] < t) )
		{
			a[++at] = t;
			ans[d[i]] = 0;
		}
		else
		{
			b[++bt] = t;
			ans[d[i]] = 1;
		}
	}
	for(i=1; i<=2*n; i++) printf("%c", ans[d[i]]==1?'v':'^');
	return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 15
• Subtask 3: 0 / 37
• Subtask 4: 0 / 39