Submission #12176

#	Time	Username	Problem	Language	Result	Execution time	Memory
12176		imsifile	전선 연결하기 (GA9_wire)	C++98	0 / 100	0 ms	5020 KiB

wire

#include<stdio.h>
#include<vector>
#define top(v) (v.size()?v[v.size()-1]:2*n)
using namespace std;

int n, ba[600060], ix2[300030];
bool chk[300030];
vector<int> stk[2];

int main(){
	int i;
	scanf("%d", &n);
	for(i=0; i<2*n; i++){
		scanf("%d", &ba[i]);
		ix2[ba[i]]=i;
	}
	for(i=0; i<2*n; i++){
		if(ix2[ba[i]]==i)stk[chk[ba[i]]].pop_back();
		else{
			if(ix2[ba[i]]<top(stk[0]))chk[ba[i]]=0, stk[0].push_back(ix2[ba[i]]);
			else if(ix2[ba[i]]<top(stk[1]))chk[ba[i]]=1, stk[1].push_back(ix2[ba[i]]);
			else{
				puts("IMPOSSIBLE");
				return 0;
			}
		}
	}
	for(i=0; i<2*n; i++)printf("%c", chk[ba[i]]?'v':'^');
	return 0;
}

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