a[i][1][1] = "2"
P[a[i][1][1]] = P["2"]

a[i][1][1] = tonumber("2")
P[a[i][1][1]] = P[2]

local typedT = function(key_type, value_type, allow_nil)

    local val_t = {}
    local proxy = {}
    if allow_nil == nil then allow_nil = true end

    local check_type = function(value, c_type)
        if (c_type or '') == '' then return true end
        if (('integer|float'):find(c_type)) then
            return math.type(value) == c_type
        end
        return type(value) == c_type
    end

    local mt = {
      __index = val_t,
      __newindex = function (_, k, v)
        if not check_type(k, key_type) then
            error("attempt to index with "..(type(k) == 'number' and math.type(k) or type(k)).. " type", 2)
        end
        if (not allow_nil and v == nil) or (v ~= nil and not check_type(v, value_type)) then
            error("attempt to set a value "..(type(v) == 'number' and math.type(v) or type(v)).. " type", 2)
        end
        val_t[k] = v
    end
    }
    setmetatable(proxy, mt)
    return proxy
end


local t = typedT('number')

SP[2]=0;

a[N][1][1]=tonumber(l:sub(i+1,i+1))