1.8 KiB
1.8 KiB
id | localeTitle | challengeType | title |
---|---|---|---|
5 | 5900f39c1000cf542c50feaf | 5 | Problem 48: Self powers |
Description
Instructions
Tests
tests:
- text: ' <code>selfPowers(10, 3)</code> debe devolver 317.'
testString: 'assert.strictEqual(selfPowers(10, 3), 317, "<code>selfPowers(10, 3)</code> should return 317.");'
- text: ' <code>selfPowers(150, 6)</code> debe devolver 29045.'
testString: 'assert.strictEqual(selfPowers(150, 6), 29045, "<code>selfPowers(150, 6)</code> should return 29045.");'
- text: ' <code>selfPowers(673, 7)</code> debe devolver 2473989.'
testString: 'assert.strictEqual(selfPowers(673, 7), 2473989, "<code>selfPowers(673, 7)</code> should return 2473989.");'
- text: ' <code>selfPowers(1000, 10)</code> debe devolver 9110846700.'
testString: 'assert.strictEqual(selfPowers(1000, 10), 9110846700, "<code>selfPowers(1000, 10)</code> should return 9110846700.");'
Challenge Seed
function selfPowers(power, lastDigits) {
// Good luck!
return true;
}
selfPowers(1000, 10);
Solution
function selfPowers(power, lastDigits) {
let sum = 0;
const modulo = Math.pow(10, lastDigits);
for (let i = 1; i <= power; i++) {
let temp = i;
for (let j = 1; j < i; j++) {
temp *= i;
temp %= modulo;
}
sum += temp;
sum %= modulo;
}
return sum;
}