const arr = new Array(10).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => acc.concat(v +1), []).reduce((v,n)=>v+n, 0)const arr = new Array(10).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => {acc.push(v +1); return acc;}, []).reduce((v,n)=>v+n, 0)const arr = new Array(30).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => acc.concat(v +1), []).reduce((v,n)=>v+n, 0)const arr = new Array(30).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => {acc.push(v +1); return acc;}, []).reduce((v,n)=>v+n, 0)const arr = new Array(100).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => acc.concat(v +1), []).reduce((v,n)=>v+n, 0)const arr = new Array(100).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => {acc.push(v +1); return acc;}, []).reduce((v,n)=>v+n, 0)const arr = new Array(500).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => acc.concat(v +1), []).reduce((v,n)=>v+n, 0)const arr = new Array(500).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => {acc.push(v +1); return acc;}, []).reduce((v,n)=>v+n, 0)const arr = new Array(1000).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => acc.concat(v +1), []).reduce((v,n)=>v+n, 0)const arr = new Array(1000).fill(0).map((_, i)=>i)
arr.reduce((acc, v) => {acc.push(v +1); return acc;}, []).reduce((v,n)=>v+n, 0)