"use strict";

function assert(b) {
    if (!b)
        throw new Error();
}

const inc = (x, y) => { return x + 1; }
const inc2 = (x, y) => { return y ? y + 1 : x + 1; }
function bar() {
    return inc.call(null, inc.call(null, inc.call(null, inc.call(null,
      inc.call(null, inc.call(null, inc.call(null, inc.call(null,
        inc.call(null, inc.call(null, inc.call(null, inc.call(null,
          inc.call(null, inc.call(null, inc.call(null, inc.call(null,
            inc.call(null, inc.call(null, inc.call(null, inc.call(null,
              inc.call(null, 1)))))))))))))))))))));
}
assert(bar() === 22);

function randomApplyOrCall(bias, size, dontSpreadBias = 0) {
    let cur = `1`;
    for (let i = 0; i < size; ++i) {
        if (Math.random() >= bias) {
            if (Math.random() >= dontSpreadBias)
                cur = `inc.call(null, ${cur})`;
            else
                cur = `inc.call(...[null, ${cur}])`;
        } else {
            if (Math.random() >= dontSpreadBias)
                cur = `inc.apply(null, [${cur}])`;
            else
                cur = `inc.apply(...[null, [${cur}]])`;
        }
    }

    if (bias > 0.85) {
        cur = `let random = ${Math.random()}; ${cur}`;
    }

    return eval(cur);
}

const depth = 100;
assert(randomApplyOrCall(0, depth) === depth + 1);
assert(randomApplyOrCall(1, depth) === depth + 1);
assert(randomApplyOrCall(0, depth, 0) === depth + 1);
assert(randomApplyOrCall(1, depth, 1) === depth + 1);
for (let i = 0; i < 1000; ++i) {
    assert(randomApplyOrCall(Math.random(), depth) === depth + 1);
    assert(randomApplyOrCall(Math.random(), depth + 1, Math.random()) === depth + 2);
}

function baz() {
    return inc.call(null, inc.call(null, inc.call(null, inc.call(null,
      inc.call(null, inc.call(null, inc.call(null, inc.call(null,
        inc.call(null, inc.call(null, inc.call(null, inc.call(null,
          inc.call(null, inc.call(null, inc.call(null, inc.call(null,
            inc.call(null, inc.call(null, inc.call(null, inc.call(null,
              inc.call(null, 1)))))))))))))))))))), 
       inc.call(null, inc.call(null, 1)));
}
assert(baz() === 22);

function jaz() {
    return inc.call(null, inc.call(null, inc.call(null, inc.call(null,
      inc.call(null, inc.call(null, inc.call(null, inc.call(null,
        inc.call(null, inc.call(null, inc.call(null, inc.call(null,
          inc.call(null, inc.call(null, inc.call(null, inc.call(null,
            inc.call(null, inc.apply(null, [inc.call(null, inc.call(null,
              inc.call(null, 1)))]))))))))))))))))),
       inc.call(null, inc.call(null, inc.apply(null, [1]))));
}
assert(jaz() === 22);

function haz() {
    return inc.call(null, inc.call(null, inc.call(null, inc.call(null,
      inc.call(null, inc.call(null, inc.call(null, inc.call(null,
        inc.call(null, inc.call(null, inc.call(null, inc.call(null,
          inc.call(null, inc.call(null, inc.call(null, inc.call(null,
            inc.call(null, inc.apply(null, [inc.call(null, inc.call(null,
              inc.call(null, 1)))]))))))))))))))))),
        inc.call(null, inc.call(null, inc.call(null, inc.call(null,
          inc.call(null, inc.call(null, inc.call(null, inc.call(null,
            inc.call(null, inc.call(null, inc.call(null, inc.call(null,
              inc.call(null, inc.call(null, inc.call(null, inc.call(null,
                inc.call(null, inc.apply(null, [inc.call(null, inc.call(null,
                  inc.call(null, 1)))])))))))))))))))))));
}
assert(haz() === 22);

function foo() {
    return inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
      inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
        inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
          inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
            inc2.call(null, inc2.apply(null, [inc2.call(null, inc2.call(null,
              inc2.call(null, 1)))]))))))))))))))))),
        inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
          inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
            inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
              inc2.call(null, inc2.call(null, inc2.call(null, inc2.call(null,
                inc2.call(null, inc2.apply(null, [inc2.call(null, inc2.call(null,
                  inc2.call(null, inc2.call(null, inc.call(null, 1)))))])))))))))))))))))));
}
assert(foo() === 25);