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Notes, ideas, and observations

发表于 分类于 ， 本文字数： 104 阅读时长 ≈ 1 分钟

水题

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#include <iostream>
#include <sstream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int mod = 0;
    ostringstream out;
    for (int i = 0; i < n; i++) {
        string name, pass;
        int flag = 0;
        cin >> name >> pass;
        for (auto &&ch : pass) {
            switch (ch) {
                case 'l': ch = 'L'; flag = 1; break;
                case '1': ch = '@'; flag = 1; break;
                case '0': ch = '%'; flag = 1; break;
                case 'O': ch = 'o'; flag = 1; break;
                default: break;
            }
        }
        if (flag) {
            mod++;
            out << name << " " << pass << endl;
        }
    }
    if (mod) {
        cout << mod << endl << out.str();
    } else {
        cout << "There " << (n == 1 ? "is" : "are") << " " << n << " account"
             << (n == 1 ? "" : "s") << " and no account is modified" << endl;
    }
    return 0;
}

发表于 分类于 ， 本文字数： 769 阅读时长 ≈ 3 分钟

#c++11(新?)特性之右值引用

#右值

发表于 分类于 ， 本文字数： 100 阅读时长 ≈ 1 分钟

送分题

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#include <iostream>
using namespace std;

struct student {
    string name;
    string major;
};

int main()
{
    int n;
    cin >> n;
    student s, male_min, female_max;
    int score, male_score_min = 101, female_score_max = -1;
    string gender;
    for (int i = 0; i < n; i++) {
        cin >> s.name >> gender >> s.major >> score;
        if (gender == "M") {
            if (score < male_score_min) {
                male_min = s;
                male_score_min = score;
            }
        } else {
            if (score > female_score_max) {
                female_max = s;
                female_score_max = score;
            }
        }
    }

    if (female_score_max != -1) {
        cout << female_max.name << " " << female_max.major << endl;
    } else {
        cout << "Absent" << endl;
    }
    if (male_score_min != 101) {
        cout << male_min.name << " " << male_min.major << endl;
    } else {
        cout << "Absent" << endl;
    }
    if (female_score_max != -1 && male_score_min != 101) {
        cout << female_score_max - male_score_min << endl;
    } else {
        cout << "NA" << endl;
    }

    return 0;
}

发表于 分类于 ， 本文字数： 71 阅读时长 ≈ 1 分钟

水题, 注意边界情况

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class Solution {
public:
    vector<string> summaryRanges(vector<int>& nums) {
        int n = nums.size();
        int last = (n>0?nums[0]:0);
        vector<string> res;
        for(int i=1;i<=n;i++){
            if(i==n || nums[i]!=nums[i-1]+1){
                if (last==nums[i-1]){
                    res.push_back(to_string(last));
                }else{
                    res.push_back(to_string(last)+"->"+to_string(nums[i-1]));
                }
                if(i<n) last=nums[i];
            }
        }
        return res;
    }
};
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