Submission #42510709

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Source Code Expand

#include<cstdio>
using namespace std;
#define Ls(i,l,r) for(int i=l;i<r;++i)
#define Rs(i,l,r) for(int i=l;i>r;--i)
#define Le(i,l,r) for(int i=l;i<=r;++i)
#define Re(i,l,r) for(int i=l;i>=r;--i)
#define L(i,l) for(int i=0;i<l;++i)
#define E(i,l) for(int i=1;i<=l;++i)
#define W(t) while(t--)
const int N=200010;
int n,a[N],r[N],m,top,st[N],in[N];
int main(){
    #ifndef ONLINE_JUDGE
    freopen("1.in","r",stdin);
    // freopen("1.out","w",stdout);
    // ios::sync_with_stdio(0);
    // cin.tie(0);
    // cout.tie(0);
    #endif
    // Insert Code Here
    scanf("%d%d",&n,&m);
    E(i, n)scanf("%d",a+i),r[a[i]]=i;
    E(i, n){
        if(in[a[i]])continue;
        in[a[i]]=1;
        while(top&&st[top]>a[i]&&r[st[top]]>i)in[st[top]]=0,--top;
        st[++top]=a[i];
    }
    E(i, top)printf("%d ",st[i]);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   21 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
./Main.cpp:22:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   22 |     E(i, n)scanf("%d",a+i),r[a[i]]=i;
      |            ~~~~~^~~~~~~~~~

Judge Result