Submission #1015726

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015726		mnbvcxz123	Secret (JOI14_secret)	C++17	Compilation error	0 ms	0 KiB

secret

#include<bits/stdc++.h>
#include"secret.h"
using namespace std;
using ll=long long;
using pi=pair<int,int>;

#define pb push_back
#define fi first
#define se second

constexpr int N=1e3+5;
constexpr int lg=11;
int res[lg][N];
int mask[N];
int a[N];

void build(int l, int r, int pw){
        if(l==r)return;
        int m=(l+r)>>1;
        res[pw][m]=a[m];
        for(int i=m-1;i>=l;--i)
                res[pw][i]=Secret(a[i],res[pw][i+1]);
        res[pw][m+1]=a[m+1];
        for(int i=m+2;i<=r;++i)
                res[pw][i]=Secret(res[pw][i-1],a[i]);
        for(int i=m+1;i<=r;++r)
                mask[i]^=1<<pw;
        build(l,mid,pw+1);
        build(mid+1,r,pw+1);
}

void Init(int n, int t[]){
        for(int i=0;i<n;++i)
                a[i]=t[i];
        build(0,n-1,0);
}

int Query(int l, int r){
        if(l==r)return a[l];
        int x=__builtin_ctz(mask[l]^mask[r]);
        return Secret(res[x][l],res[x][r]);
}

Compilation message (stderr)

secret.cpp: In function 'void build(int, int, int)':
secret.cpp:28:17: error: 'mid' was not declared in this scope
   28 |         build(l,mid,pw+1);
      |                 ^~~