Submission #3417

#	Time	Username	Problem	Language	Result	Execution time	Memory
3417		Qwaz	Divide into triangle (kriii1_D)	C++98	1 / 1	0 ms	1096 KiB

D

#include <cstdio>
#include <algorithm>

const int MAX=310;

struct pos {
	int x, y, num;

	bool operator < (const pos &t) const {
		if(y == t.y)
			return x < t.x;
		return y < t.y;
	}
};

int n;
pos data[MAX*3];

void input(){
	scanf("%d", &n);

	n *= 3;

	int i;
	for(i=0; i<n; i++){
		scanf("%d%d", &data[i].x, &data[i].y);

		data[i].num = i+1;
	}
}

void solve(){
	std::sort(data, data+n);

	pos p, q;

	int i;
	for(i=0; i<n; i++){
		if(i%3 == 0)
			p = data[i];
		else if(i%3 == 1)
			q = data[i];
		else
			printf("%d %d %d\n", p.num, q.num, data[i].num);
	}
}

int main(){
	input();

	solve();

	return 0;
}

• Subtask 1: 1 / 1