#include<stdio.h>int f(int a[],int low,int high,int x){    int mid;     while (low<=high)     {        mid=(low+high)/2;        if(a[mid]>x) high=mid-1;            else if(a[mid]<x) low=mid+1;                else return mid+1;      }     return 0;}int main(){    int a[30],n,i,x,y;    while(scanf("%d",&n)!=EOF)    {        for(i=0;i<=n;i++)        scanf("%d",&a[i]);        x=a[n];        y=f(a,0,n,x);        if (  y==0 ) printf("No found!\n");         else printf("%d\n",y);    }    return 0;} 

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#include<stdio.h>
int f(int a[],int low,int high,int x)
{    int mid;
     while (low<=high)
     {
        mid=(low+high)/2;
        if(a[mid]>x) high=mid-1;
            else if(a[mid]<x) low=mid+1;
                else return mid+1;
     }
     return 0;
}

int main()
{
    int a[30],n,i,x,y;

    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<=n;i++)
        scanf("%d",&a[i]);
        x=a[n];
        y=f(a,0,n,x);
        if (  y==0 ) printf("No found!\n");
        else printf("%d\n",y);
    }
    return 0;
}

#include<stdio.h>int a[30],x;int f(int low,int high){    int mid;     while (low<=high)     {        mid=(low+high)/2;        if(a[mid]>x) high=mid-1;            else if(a[mid]<x) low=mid+1;                else return mid;      }     return -1;}int main(){    int n,i,y;    while(scanf("%d",&n)!=EOF)    {   for(i=0;i<=n;i++)          scanf("%d",&a[i]);        x=a[n];        y=f(0,n-1);        if (  y==-1 ) printf("No found!\n");         else printf("%d\n",y+1);    }    return 0;} 

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#include<stdio.h>
int a[30],x;
int f(int low,int high)
{    int mid;
     while (low<=high)
     {
        mid=(low+high)/2;
        if(a[mid]>x) high=mid-1;
            else if(a[mid]<x) low=mid+1;
                else return mid;
     }
     return -1;
}

int main()
{
    int n,i,y;
    while(scanf("%d",&n)!=EOF)
    {   for(i=0;i<=n;i++)
          scanf("%d",&a[i]);
        x=a[n];
        y=f(0,n-1);
        if (  y==-1 ) printf("No found!\n");
        else printf("%d\n",y+1);
    }
    return 0;
}

#include<stdio.h>int f(int a[],int low,int high,int x){    int mid;     while (low<=high)     {        mid=(low+high)/2;        if(a[mid]>x) high=mid-1;            else if(a[mid]<x) low=mid+1;                else return mid;      }     return -1;}int main(){    int a[30],n,i,x,y;    while(scanf("%d",&n)!=EOF)    {        for(i=0;i<=n;i++)        scanf("%d",&a[i]);        x=a[n];        y=f(a,0,n,x);        if (  y==-1 ) printf("No found!\n");         else printf("%d\n",y+1);    }    return 0;} 

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#include<stdio.h>
int f(int a[],int low,int high,int x)
{    int mid;
     while (low<=high)
     {
        mid=(low+high)/2;
        if(a[mid]>x) high=mid-1;
            else if(a[mid]<x) low=mid+1;
                else return mid; 
     }
     return -1;
}

int main()
{
    int a[30],n,i,x,y;

    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<=n;i++)
        scanf("%d",&a[i]);
        x=a[n];
        y=f(a,0,n,x);
        if (  y==-1 ) printf("No found!\n");
        else printf("%d\n",y+1);
    }
    return 0;
}

#include<stdio.h>int f(int a[],int low,int high,int x){    int mid;     while (low<=high)     {        mid=(low+high)/2;        if(a[mid]>x) high=mid-1;            else if(a[mid]<x) low=mid+1;                else return mid+1;      }     return -1;}int main(){    int a[30],n,i,x,y;    while(scanf("%d",&n)!=EOF)    {        for(i=0;i<=n;i++)        scanf("%d",&a[i]);        x=a[n];        y=f(a,0,n,x);        if (  y==-1 ) printf("No found!\n");         else printf("%d\n",y);    }    return 0;} 

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#include<stdio.h>
int f(int a[],int low,int high,int x)
{    int mid;
     while (low<=high)
     {
        mid=(low+high)/2;
        if(a[mid]>x) high=mid-1;
            else if(a[mid]<x) low=mid+1;
                else return mid+1;
     }
     return -1;
}

int main()
{
    int a[30],n,i,x,y;

    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<=n;i++)
        scanf("%d",&a[i]);
        x=a[n];
        y=f(a,0,n,x);
        if (  y==-1 ) printf("No found!\n");
        else printf("%d\n",y);
    }
    return 0;
}