PAT 1022. Digital Library

完全考输入输出

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <vector>
#include <string>
#include <unordered_map>
#include <algorithm>
using namespace std;

unordered_map<string, vector<int> > idx_title;
unordered_map<string, vector<int> > idx_author;
unordered_map<string, vector<int> > idx_keyword;
unordered_map<string, vector<int> > idx_publisher;
unordered_map<string, vector<int> > idx_year;

unordered_map<string, vector<int> >* idx[6] = {NULL, &idx_title, &idx_author, &idx_keyword, &idx_publisher, &idx_year};

void idx_add_book(unordered_map<string, vector<int> >& idx, const string& key, int book_id) {
    auto iter = idx.find(key);
    if (iter == idx.end()) {
        iter = idx.insert(make_pair(key, vector<int>())).first;
    }
    iter->second.push_back(book_id);
}

int main() {

    int N, M;
    scanf("%d", &N);

    char ibuf[100] = {0};
    int bid = 0;
    for (int i=0; i<N; i++) {
        scanf("%d", &bid);
        getchar();
        // read title
        scanf("%[^\n]", ibuf);
        idx_add_book(idx_title, string(ibuf), bid);
        getchar();
        // read author
        scanf("%[^\n]", ibuf);
        idx_add_book(idx_author, string(ibuf), bid);
        getchar();
        // read keywords
        for (;;) {
            scanf("%[^ \n]", ibuf);
            idx_add_book(idx_keyword, string(ibuf), bid);
            if (getchar() == ‘\n‘) {
                break;
            }
        }
        // read publisher
        scanf("%[^\n]", ibuf);
        idx_add_book(idx_publisher, string(ibuf), bid);
        getchar();
        // read year
        scanf("%[^\n]", ibuf);
        idx_add_book(idx_year, string(ibuf), bid);
        getchar();
    }

    scanf("%d", &M);
    string buf;
    for (int i=0; i<M; i++) {
        int idx_type = 0;
        scanf("%d", &idx_type);
        getchar();
        getchar();
        if (idx_type < 1 || idx_type > 5) {
            break;
        }
        getline(cin, buf);
        printf("%d: %s\n", idx_type, buf.c_str());
        auto dict = idx[idx_type];
        if (dict == NULL) {
            break;
        }
        auto iter = dict->find(buf);
        if (iter == dict->end()) {
            printf("Not Found\n");
            continue;
        }
        auto v = iter->second;
        sort(v.begin(), v.end());
        int len = v.size();
        for (int i=0; i<len; i++) {
            printf("%07d\n", v[i]);
        }
    }

    return 0;
}