题目详情 - L2-040 哲哲打游戏 (pintia.cn)
感觉就是阅读理解题+一些stl。
#include<iostream>
#include<algorithm>
#include<cstring>
#include<vector>
#include<map>
using namespace std;
const int N = 100010;
vector<vector<int>> g(N);
int res[N];
int main(){
cin.tie(0)->sync_with_stdio(false);
cout.tie(0);
int n,m;
cin>>n>>m;
for(int i = 1; i <= n; i++){
int k; cin>>k;
while(k--){
int x; cin>>x;
g[i].push_back(x);
}
}
int now = 1;
while(m--){
int a,b;
cin>>a>>b;
if(a == 0){
now = g[now][b-1];
} else if(a == 1){
res[b] = now;
cout<<now<<endl;
} else {
now = res[b];
}
}
cout<<now;
return 0;
}
