Runtime: 59 ms , Your runtime beats 76.14 % of cpp submissions.(2017/9/21)

495_Teemo Attacking.cpp

class Solution {
public:
    int findPoisonedDuration(vector<int>& ts, int dur) {
        unsigned int temp=0;
        for(int i=0;i < (int)ts.size()-1 ; i++){
        if( (int)dur-ts[i+1]+ts[i] > 0)
            temp+=(int)dur-ts[i+1]+ts[i];
        }
        return (int)dur*ts.size()-temp;
    }
};