阿里巴巴2020屆暑期實習C++開發編程題2

區間合併

#include <iostream>
#include <map>
#include <cmath>
#include <cstring>
#include <algorithm>
#include <vector>
using namespace std;
struct Interval{
    int start;
    int end;
    Interval() : start(0), end(0) {}
    Interval(int s, int e) : start(s), end(e) {}
};
int ReturnNum(string s,int i,int j,int len){
    int num = 0;
    for(int a=i+1;a<j;a++){
        num+=(s[a]-'0')*pow(10,--len);
    }
    return num;
}
void CutString(string s,map<int,int> &ans){
    int tmp1=0,tmp2=0,tmp3=0;
    int num1 = 0,num2 = 0;
    for(int i=0;i<s.length();i++){
        if(s[i] == '[')
            tmp1 = i;
        if(s[i] == '-')
            tmp2 = i;
        if(s[i] == ')'){
            tmp3 = i;
            num1 = ReturnNum(s,tmp1,tmp2,tmp2-tmp1-1);
            num2 = ReturnNum(s,tmp2,tmp3,tmp3-tmp2-1);
            if(ans[num1] != NULL && ans[num1] < num2)
                ans[num1] = num2;
            if(ans[num1] == NULL)
                ans[num1] = num2;
        }
    }
}
void Print(int a,int b){
    cout << "[";
    cout << a;
    cout << "-";
    cout << b;
    cout << ")";
}
int main(){
    string s1,s2;
    map<int,int> input;
    vector<Interval>intervals;
    vector<Interval> result;
    while(cin >> s1){
        input.clear();
        intervals.clear();
        result.clear();
        CutString(s1,input);
        cin >> s2;
        CutString(s2,input);
        map<int,int>::iterator it;
        int q=0;
        int s,e;
        for(it=input.begin();it!=input.end();it++){
            s = it->first;
            e = it->second;
            intervals.push_back(Interval(s,e));
            q++;
        }
        int left = intervals[0].start;
        int right = intervals[0].end;
        for(int i=1;i<intervals.size();i++){
            if(intervals[i].start<=right){
                right = max(intervals[i].end,right);
            }
            else{
                result.push_back(Interval(left,right));
                left = intervals[i].start;
                right = intervals[i].end;
            }
        }
        result.push_back(Interval(left,right));
        for(int i=0;i<result.size()-1;i++){
            Print(result[i].start,result[i].end);
            cout <<" ,";
        }
        Print(result[result.size()-1].start,result[result.size()-1].end);
        cout << endl;
    }
    return 0;

}

/*
[5-60),[75-100),[120-160)
[70-90)
*/