War_In_Country

As you are aware that your neighbouring country is under the war. You being the chief securtiy adivser of your country are worry about security of your country. So you decided to export $x$ unit of weapon in your border area from your security center. To do so you have $n$ kind of transport vehicles where $i_{th}$ vehicle take $a_i$ time for one trip. Each vehicle in one trip are capable of trans