提出 #63804472

ソースコード 拡げる

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#include<bits/stdc++.h>
using namespace std;
int main(){
  int i,j,ans,cans,N,A[300005],F[300005],L[300005],Ans[300005];
  set<int> st;
  set<int> stl;
  cin>>N;
  for(i=0;i<N;i++){
    cin>>A[i];
  }
  for(i=0;i<N;i++){
    if(st.find(A[i])==st.end()){
      st.insert(A[i]);
      F[i]=F[i-1]+1;
    }else{
      F[i]=F[i-1];
    }
   // cout<<F[i]<<endl;
  }
 
 
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#include<bits/stdc++.h>

using namespace std;

int main(){
  int i,j,ans,cans,N,A[300005],F[300005],L[300005],Ans[300005];
  set<int> st;
  set<int> stl;
  cin>>N;
  for(i=0;i<N;i++){
    cin>>A[i];
  }
  for(i=0;i<N;i++){
    if(st.find(A[i])==st.end()){
      st.insert(A[i]);
      F[i]=F[i-1]+1;
    }else{
      F[i]=F[i-1];
    }
   // cout<<F[i]<<endl;
  }
  for(i=N-1;i>=0;i--){
    if(stl.find(A[i])==stl.end()){
      stl.insert(A[i]);
      L[i]=L[i+1]+1;
    }else{
      L[i]=L[i+1];
    }
    //cout<<L[i]<<endl;
  }
  ans=0;
  for(i=0;i<N-1;i++){
    Ans[i]=F[i]+L[i+1];
    ans=max(ans,Ans[i]);
  }
  cout<<ans;
  return 0;
}

提出情報

コンパイルエラー

Main.cpp: In function ‘int main()’:
Main.cpp:6:9: warning: unused variable ‘j’ [-Wunused-variable]
    6 |   int i,j,ans,cans,N,A[300005],F[300005],L[300005],Ans[300005];
      |         ^
Main.cpp:6:15: warning: unused variable ‘cans’ [-Wunused-variable]
    6 |   int i,j,ans,cans,N,A[300005],F[300005],L[300005],Ans[300005];
      |               ^~~~

ジャッジ結果