'use strict';

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

var fs = require('fs');

var input = Buffer.alloc(0x10000);
fs.readSync(0, input, 0, 0x10000);

var _input$toString$split = input.toString().split('\n').map(function (n) {
    return parseInt(n);
}),
    _input$toString$split2 = _slicedToArray(_input$toString$split, 4),
    A = _input$toString$split2[0],
    B = _input$toString$split2[1],
    C = _input$toString$split2[2],
    X = _input$toString$split2[3];

var answer = 0;

for (var a = 0; a <= Math.min(Math.floor(X / 500), A); a++) {
    var remnantA = X - 500 * a;
    for (var b = 0; b <= Math.min(Math.floor(remnantA / 100), B); b++) {
        var remnantB = remnantA - 100 * b;
        if (remnantB >= 0 && remnantB <= C * 50) {
            answer++;
        }
    }
}

console.log(answer);