"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var readline_1 = __importDefault(require("readline"));
process.stdin.resume();
process.stdin.setEncoding('utf8');
var reader = readline_1.default.createInterface({
    input: process.stdin,
    output: process.stdout,
});
var lines = [];
reader.on('line', function (line) {
    lines.push(line);
});
reader.on('close', function () {
    var r = Number(lines[0]);
    console.log(Math.pow(r, 2));
});
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