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package main
import (
"fmt"
)
func straightLine(arr [][]int) bool {
x1, y1 := arr[0][0], arr[0][1]
x2, y2 := arr[1][0], arr[1][1]
for i := 2; i < len(arr); i++ {
x, y := arr[i][0], arr[i][1]
if (x-x1)*(y2-y1) != (y-y1)*(x2-x1) {
return false
}
}
return true
}
func main() {
fmt.Println(straightLine([][]int{{2, 1}, {2, 3}, {2, 5}}))
fmt.Println(straightLine([][]int{{1, 4}, {3, 4}, {10, 4}}))
fmt.Println(straightLine([][]int{{0, 0}, {1, 1}, {2, 3}}))
fmt.Println(straightLine([][]int{{1, 1}, {1, 1}, {1, 1}}))
fmt.Println(straightLine([][]int{{1000000, 1000000},
{2000000, 2000000},
{3000000, 3000000}}))
}
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