Submission #931627

#	Time	Username	Problem	Language	Result	Execution time	Memory
931627		PieArmy	Exam (eJOI20_exam)	C++17	12 / 100	17 ms	3272 KiB

exam

typedef long long ll;
ll pie(ll army){return (1ll<<army);}
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pb push_back
#define endl '\n';
#define mid ((left+right)>>1)
const ll inf=2000000000000000005;
const int sonsuz=2000000005;
using namespace std;
ll fpow(ll x,ll y,ll m=0){if(y<0){cout<<"powError";return -1;}if(m)x%=m;ll res=1;while(y>0){if(y&1)res*=x;x*=x;if(m){x%=m;res%=m;}y>>=1;}return res;}

void code(){
    int n;cin>>n;
    int A[n+1],B[n+1];
    for(int i=1;i<=n;i++)
        cin>>A[i];
    for(int i=1;i<=n;i++){
        cin>>B[i];
    }
    bool dp[n+1];for(bool &x:dp)x=false;
    bool cur=false;
    for(int i=1;i<=n;i++){
        if(A[i]==B[1])cur=true;
        if(A[i]>B[1])cur=false;
        dp[i]|=cur;
    }
    cur=false;
    for(int i=n;i;i--){
        if(A[i]==B[1])cur=true;
        if(A[i]>B[1])cur=false;
        dp[i]|=cur;
    }
    int ans=0;
    for(int i=1;i<=n;i++)
        if(dp[i])
            ans++;
    cout<<ans;
}

int main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);
    bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
    int t=1;
    if(!t)cin>>t;
    while(t--){code();cout<<endl;}
    return 0;
}

Compilation message (stderr)

exam.cpp: In function 'int main()':
exam.cpp:44:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~
exam.cpp:44:60: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                                                     ~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22