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15.js
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15.js
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function checkSledJump(heights){
let actual_movement;
const movement={
UP:0,
DOWN:1,
}
for(let i=1;i<heights.length;i++){
if(heights[i]==heights[i-1]){
return false;
}
else if(heights[i]>heights[i-1]){
actual_movement=movement.UP;
}
else if(heights[i]<heights[i-1]){
actual_movement=movement.DOWN;
}
}
if(actual_movement===movement.UP){
return false;
}
return true;
}
console.log(checkSledJump([1, 2, 3, 2, 1])); // true: sube y baja de forma estricta
console.log(checkSledJump([0, 1, 0])); // -> true: sube y baja de forma estricta
console.log(checkSledJump([0, 3, 2, 1])); // -> true: sube y baja de forma estricta
console.log(checkSledJump([0, 1000, 1])); // -> true: sube y baja de forma estricta
console.log(checkSledJump([2, 4, 4, 6, 2])); // false: no sube de forma estricta
console.log(checkSledJump([1, 2, 3])); // false: sólo sube
console.log(checkSledJump([1, 2, 3, 2, 1, 2, 3])); // false: sube y baja y sube... ¡no vale!