pat1141 PAT Ranking of Institutions

题意：给出一些学校的成绩，比赛的层次，分数，输出学校的排名，分数，人数。

思路：排序就好。

代码

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <map>
#include <vector>

using namespace std;

const int MAX_N = 100010;

struct Data {
    string sch;
    double grade;
    int cnt;

    bool operator < (const Data& d) const {
        return (int)grade>(int)d.grade || ((int)grade==(int)d.grade && cnt < d.cnt) || 
        ((int)grade==(int)d.grade && cnt==d.cnt && sch < d.sch);
    }
}d[MAX_N];

char a[100], b[100];
int gr, n;

vector<string> v;
map<string, int> id;
int get_id(string x) {
    if (id.count(x)) return id[x];
    v.push_back(x);
    return id[x] = v.size()-1;
}

int main() {
    // freopen("in.txt", "r", stdin);
    // freopen("out.txt", "w", stdout);
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        scanf("%s %d %s", a, &gr, b); int len = strlen(b);
        double tmp = 0.0;
        if (a[0] == 'A') tmp = gr;
        else if (a[0] == 'B') tmp = 1.0*gr/1.5;
        else if (a[0] == 'T') tmp = 1.5*gr;
        for(int j = 0; j < len; j++) b[j]=tolower(b[j]);
        int t = get_id(b);
        d[t].cnt++; d[t].grade+=tmp; d[t].sch=b;
    }
    sort(d, d+v.size());
    int ind = 0, ct = 1, la = -1;
    printf("%lu\n", v.size());
    for (int i = 0; i < v.size(); i++) {
        if (la == (int)d[i].grade) ct++;
        else {
            ind += ct; ct = 1; la = (int)d[i].grade;
        }
        printf("%d %s %d %d\n", ind, d[i].sch.c_str(), (int)d[i].grade, d[i].cnt);
    }
    return 0;
}