제출 #134578

#제출 시각아이디문제언어결과실행 시간메모리
134578mohammedehab2002XOR (IZhO12_xor)C++11
100 / 100
203 ms23416 KiB
#include <iostream> using namespace std; int l,trie[10000000][2],mn[10000000],cn; void insert(int x,int idx) { int cur=0; for (int i=29;i>=0;i--) { bool b=(x&(1<<i)); if (!trie[cur][b]) { trie[cur][b]=++cn; mn[cn]=idx; } cur=trie[cur][b]; mn[cur]=min(mn[cur],idx); } } int get(int x) { int cur=0,ans=1e9; for (int i=29;i>=0;i--) { bool b=(x&(1<<i)),b2=(l&(1<<i)); if (!b2 && trie[cur][!b]) ans=min(ans,mn[trie[cur][!b]]); b^=b2; if (!trie[cur][b]) break; cur=trie[cur][b]; } return ans; } int main() { int n,cum=0,k=-1,idx; scanf("%d%d",&n,&l); l--; for (int i=1;i<=n;i++) { int a; scanf("%d",&a); insert(cum,i-1); cum^=a; int tmp=get(cum); if (i-tmp>k) { k=i-tmp; idx=tmp+1; } } printf("%d %d",idx,k); }

컴파일 시 표준 에러 (stderr) 메시지

xor.cpp: In function 'int main()':
xor.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&l);
  ~~~~~^~~~~~~~~~~~~~
xor.cpp:42:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
   ~~~~~^~~~~~~~~
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