mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
37 lines
818 B
C++
37 lines
818 B
C++
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#include <cstdio>
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#include <iostream>
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using namespace std;
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#define N 1005
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#define L 0.0000001
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double a[N];
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double b[N];
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int main()
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{
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int t;
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scanf("%d",&t);
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while(t--)
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{
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int n;
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scanf("%d",&n);
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int i = 0;
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for(i = 1; i <= n; i++)
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scanf("%lf%lf",&a[i],&b[i]);
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int p1,p2;
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scanf("%d%d",&p1,&p2);
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double x1 = a[p2] - a[p1];
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double y1 = b[p2] - b[p1];
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for(i = 1; i <= n; i++)
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{
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double x2 = a[i] - a[p1];
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double y2 = b[i] - b[p1];
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double sum = x1*y2 - x2*y1;
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if(sum < -L)
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printf("Right\n");
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else if(sum > L)
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printf("Left\n");
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else printf("On\n");
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}
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}
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return 0;
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}
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