ICPC 2022 网络赛 h （模拟

#include<bits/stdc++.h>
using namespace std;
using VI = vector<int>;
using ll = long long;
const int mod = 20220911;//枚举数位，枚举这一位余数是几
//每一位的限制，
//如果有repeat 就下一个
int change(string x){int res = 0 ;for(int i = 0 ; i < x.size() ; i++){res *= 10;res += (x[i] - '0');}return res;}int dfs(int res){string s;int ct = 0;int k = 0;while(cin >> s){if(s == "library"){ct++;}else if(s == "arithmetic"){}else if(s == "fin"){return (ct * max(k,1)) % mod;}else if(s == "times"){return (ct * max(k,1)) % mod;}else if(s == "repeat"){ct += dfs(0);ct = ct % mod;//son = son % mod;}else if(s == "for"){}else{k += change(s);}}
}int main(){// repeat //library repeat repeat library for 3 times arithmetic library for 3 times// for 100 times fin///*for(100){1;for(3){for(3){l}a , l}}*/cout<<dfs(0) % mod;}

模拟，难度不大