d566. 秒殺率

---

解法一

✅ 完整代碼

評分結果(參考) ： AC (6ms, 744KB)

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

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n, cnt=0, acCnt=0;
    cin >> n;
    
    unordered_map<string, bool> mp;
    vector<pair<string, bool>> vt(n);
    
    for(int i=0; i<n; i++){
        string res;
        cin >> vt[i].first >> res;
        vt[i].second = (res == "AC");
    }
    for(int i=n-1; i>=0; i--){
        string name = vt[i].first;
        if(vt[i].second){
            if(!mp.count(name)) cnt++, acCnt++;
            if(mp.count(name) && !mp[name]) acCnt++;
            mp[name] = true;
        }
        else{
            if(!mp.count(name)) mp[name] = false;
        }
    }
    cout << 100*cnt/acCnt << "%";
    
    return 0;
}