제출 #41330

#제출 시각아이디문제언어결과실행 시간메모리
41330IvanCXOR (IZhO12_xor)C++14
100 / 100
225 ms37436 KiB
#include <bits/stdc++.h> using namespace std; const int MAXL = 31; const int MAXN = 250010; int Trie[MAXN*MAXL][2],maior[MAXN*MAXL],vetor[MAXN],resp1,resp2,N,K,triePtr,xoratorio; int solve(int val){ int ans = 0; int atual = 1; for(int i = MAXL - 1;i>=0;i--){ int digito = 0; if(val & (1 << i)) digito = 1; int outro = 0; if(K & (1 << i)) outro = 1; if(outro == 1){ atual = Trie[atual][digito ^ 1]; } else{ ans = max(ans, maior[Trie[atual][digito ^ 1]] ); atual = Trie[atual][digito]; } } ans = max(ans,maior[atual]); return ans; } void add(int val,int id){ int atual = 1; for(int i = MAXL-1;i>=0;i--){ int digito = 0; if(val & (1 << i)) digito = 1; if(Trie[atual][digito]){ atual = Trie[atual][digito]; } else{ Trie[atual][digito] = ++triePtr; atual = Trie[atual][digito]; } maior[atual] = max(maior[atual],id); } } int main(){ triePtr = 1; scanf("%d %d",&N,&K); for(int i = 1;i<=N;i++) scanf("%d",&vetor[i]); add(xoratorio,N+1); for(int i = N;i>=1;i--){ xoratorio ^= vetor[i]; int davez = solve(xoratorio); if(davez - i >= resp1){ resp1 = davez - i; resp2 = i; } add(xoratorio,i); } printf("%d %d\n",resp2,resp1); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

xor.cpp: In function 'int main()':
xor.cpp:42:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&N,&K);
                      ^
xor.cpp:43:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1;i<=N;i++) scanf("%d",&vetor[i]);
                                               ^
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