CCC 2015 S2 Jerseys

    1#include <bits/stdc++.h>
    2using namespace std;
    3typedef long long ll;
    4const int INF = 0x3f3f3f3f; //❄️
    5int main() {
    6    ios::sync_with_stdio(0); cin.tie(0); 
    7    int n, m; cin >> n >> m;
    8    vector<bool> vis(n + 1); vector<int> sz(n + 1);
    9    for (int i = 1; i <= n; i++) {
    10        char c; cin >> c;
    11        int a;
    12        if (c == 'M') a = 2;
    13        else if (c == 'S') a = 1;
    14        else a = 3;
    15        sz[i] = a;
    16    }
    17    int ans = 0;
    18    for (int i = 0; i < m; i++) {
    19        char c; cin >> c; 
    20        int a ;
    21        if (c == 'M') a = 2;
    22        else if (c == 'S') a = 1;
    23        else a = 3;
    24        int num; cin >> num;
    25        if (a <= sz[num] && !vis[num]) {
    26            ans++;
    27            vis[num] = 1;
    28        }
    29    }
    30    cout << ans << '\n';
    31    return 0;
    32}