제출 #881122

#제출 시각아이디문제언어결과실행 시간메모리
881122alexddXOR (IZhO12_xor)C++17
0 / 100
2025 ms151804 KiB
#include<iostream> #include<map> using namespace std; int n,x; map<int,int> fr[30]; signed main() { ios_base::sync_with_stdio(0);cin.tie(0); cin>>n>>x; int a,maxlun=0,pozmax=0,curlun,sump=0; for(int i=1;i<=n;i++) { cin>>a; sump ^= a; a = sump; ///a ^ y == x curlun = i + fr[0][(a^x)] - 300000; if(fr[0][(a^x)]!=0 && curlun > maxlun) { maxlun = curlun; pozmax=i; } int pref=0,prefx=0; for(int j=29;j>=0;j--) { if(((1<<j)&a)) pref += (1<<j); if(((1<<j)&x)) prefx += (1<<j); if(((1<<j)&x)==0) { ///pref ^ y == prefx + (1<<j) curlun = i + fr[j][(pref^(prefx+(1<<j)))] - 300000; if(fr[j][(pref^(prefx+(1<<j)))]!=0 && curlun > maxlun) { maxlun = curlun; pozmax=i; } } fr[j][pref] = max(fr[j][pref], -i + 300000); } } cout<<pozmax-maxlun+1<<" "<<maxlun; return 0; }
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