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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- vector<int>st;
- int n,q,i,j=1,flag=0,sum=0;
- string s;
- long long x;
- scanf("%d",&n);
- int a[n+2];
- for(i=1;i<=n;i++)
- {
- scanf("%d",&a[i]);
- }
- scanf("%d %lld",&q,&x);
- for(i=1;i<=q;i++)
- {
- cin>>s;
- if(s=="Harry")
- {
- st.push_back(a[j]);
- sum+=a[j];
- j++;
- }
- else
- {
- sum-=st.back();
- st.pop_back();
- }
- if(sum==x)
- {
- flag=1;
- break;
- }
- }
- if(flag==1)
- printf("%d\n",st.size());
- else
- printf("-1\n");
- }
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