#include <bits/stdc++.h>
using namespace std;
int main() {
    int S, cnt = 1;
    scanf("%d", &S);
    deque<int> Q;
    for(int i = 0; i < S; ++i) {
        char op1, op2;
        int K;
        scanf("%c %c", &op1, &op2);//就是这里！！！
        if (op1 == 'A') {
            if (op2 == 'L') Q.push_front(cnt++);
            else Q.push_back(cnt++);
        }
        else {
            scanf("%d", &K);
            if (op2 == 'L') {
                while(K--) Q.pop_front();
            }
            else {
                while(K--) Q.pop_back();
            }
        }
    }
    while(!Q.empty()) {
        printf("%d\n", Q.front());
        Q.pop_front();
    }
    return 0;
}

rt，注释处用scanf会收获满江紫，但用cin就行

求大佬解答