[134] Gas Station

感覺不難的題目，但是寫的亂七八糟XD

並且被 circular array 迷惑了QQ

最後發現別人寫的好簡單

應該只有證明的部分比較麻煩吧......(嘆氣)

int canCompleteCircuit(int* gas, int gasSize, int* cost, int costSize){

int total = 0, remain = 0, i = 0 , idx =0 ;

for ( i =0; i < gasSize; i++)

{

remain += gas[i]- cost[i];

total += gas[i]- cost[i];

if (remain < 0)

{

remain = 0;

idx = i+1;

}

}

return (total>=0)? idx : (-1);

}