function isChip(tool)
{
    return tool<0;
}

function getCellsToUseTool(tool, leek)
{
    return isChip(tool) ? getCellsToUseChip(-tool, leek) : getCellsToUseWeapon(leek);
}

function getNearestCellToUseToolFromCell(tool, cellFrom, leek)
{
    var array = [];
    for (var cell in getCellsToUseTool(tool, leek))
    {
        array[cell] = getPathLength(cellFrom, cell);
    }
    return search(array, arrayMin(array));
}

function getNeededMPsToExecuteCombo(combo, leek)
{
    var MPsNeeded = 0;
    var previousCell = getCell();
    for (var tool in combo)
    {
        var cellToUseTheTool = getNearestCellToUseToolFromCell(tool, previousCell, leek);
        MPsNeeded += getPathLength(previousCell, cellToUseTheTool);
        previousCell = cellToUseTheTool;
    }
    return MPsNeeded;
}

// Le corps :

for (var key : var possibleCombo in permutations)
{
        permutationsNeededMPs[key] = getNeededMPsToExecuteCombo(possibleCombo,leek);
}