题解 | 简单错误记录

#include <iostream>
#include <map>
#include <algorithm>
#include <sstream>
#include <vector>
using namespace std;

int main() {
    string str;
    int line;
    map<pair<string, int>, int> umap;
    vector<pair<string, int>> order;
    while(cin >> str >> line) {
        string token;
        stringstream ss(str);
        while (getline(ss, token, '\\')); //两个反斜杠才表示用一个反斜杠作为分隔符 注意反斜杠的特殊性
        int n = token.size();
        if(n > 16) {
            token = token.substr(n-16, 16);
        }
        pair<string, int> key = {token, line};
        
        if(umap.find(key) == umap.end()) {
            order.push_back(key);
        }
        ++umap[key];
        if(order.size() > 8) {
            order.erase(order.begin());
        }
    }
    for(const auto& it: order) {
        cout << it.first << " " << it.second << " " << umap[it] << endl;
    }
    return 0;
}