P17745 题解

· · 题解

该题解为本题的官方题解。

我们需要根据不同的赛制,统计选手每题得分,计算总分后按规则排名:总分高的靠前,总分相同则排名一致且按姓名字典序升序输出即可。

代码如下:

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;
map<string, map<int, int>> mp1, mp2;
map<string, int> vis;
string names[N], op, s;
int n, m, k, cnt, pid, sco, cur = 1;

struct node
{
    string na;
    int tot;
} a[N];


bool cmp(node x, node y)
{
    if (x.tot != y.tot) return x.tot > y.tot;
    return x.na < y.na;
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m >> k;
    for (int i = 0; i < m; i++)
    {
        cin >> s >> pid >> sco;
        mp1[s][pid] = sco;
        if (sco > mp2[s][pid]) mp2[s][pid] = sco;
        if (!vis[s]) vis[s] = 1, names[cnt++] = s;
    }
    cin >> op;
    for (int i = 0; i < cnt; i++)
    {
        a[i].na = names[i], a[i].tot = 0;
        if (op == "OI")
            for (auto t : mp1[names[i]])
                a[i].tot += t.second;
        else
            for (auto t : mp2[names[i]])
                a[i].tot += t.second;
    }
    sort(a, a + cnt, cmp);
    for (int i = 0; i < cnt; i++)
    {
        if (i > 0 && a[i].tot != a[i - 1].tot) cur = i + 1;
        cout << cur << " " << a[i].na << " " << a[i].tot << "\n";
    }
    return 0;
}