2409. 统计共同度过的日子数.cpp

class Solution {
public:
    vector<int>days={31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int countDaysTogether(string aA, string lA, string aB, string lB) {
		//calculating no of day each date takes.
        int aliceA=accumulate(days.begin(),days.begin()+stoi(aA.substr(0,2))-1,0)+stoi(aA.substr(3,aA.size()));
        int aliceL=accumulate(days.begin(),days.begin()+stoi(lA.substr(0,2))-1,0)+stoi(lA.substr(3,aA.size()));
        int bobA=accumulate(days.begin(),days.begin()+stoi(aB.substr(0,2))-1,0)+stoi(aB.substr(3,aA.size()));
        int bobL=accumulate(days.begin(),days.begin()+stoi(lB.substr(0,2))-1,0)+stoi(lB.substr(3,aA.size()));
        int x = min(aliceL,bobL)-max(aliceA,bobA);
        if(x>=0)
            return x+1;
        return 0; 
        
    }
};