제출 #444660

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
444660	2021-07-14 14:18:49	drkarlicio2107	XORanges (eJOI19_xoranges)	C++14	100 / 100	672 ms	8644 KiB

xoranges

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#include <bits/stdc++.h>
using namespace std; int fen_parni [200020]; int fen_neparni [200020]; int l [200020];
void add_parni (int a, int v){
  for (a; a<200010; a+= a & -a) fen_parni[a]^=v;
}
int query_parni (int a){
  int res=0;
  for (a; a>0; a-= a & -a) res^=fen_parni[a];
  return res;
}
void add_neparni (int a, int v){
  for (a; a<200010; a+= a & -a) fen_neparni[a]^=v;
}
int query_neparni (int a){
  int res=0;
  for (a; a>0; a-= a & -a) res^=fen_neparni[a];
  return res;
}
int main(){
  int n,q; cin >> n >> q;
  for (int i=1; i<n+1; i++){
    int a; cin >> a;
    if (i%2==0) add_parni (i, a);
    else add_neparni (i, a);
    l[i]=a;
    /*
    if (i%2==0) cout << query_parni (i) << endl;
    else cout << query_neparni (i) << endl;
    */
  }
 
 
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컴파일 시 표준 에러 (stderr) 메시지

xoranges.cpp: In function 'void add_parni(int, int)':
xoranges.cpp:4:7: warning: statement has no effect [-Wunused-value]
    4 |  for (a; a<200010; a+= a & -a) fen_parni[a]^=v;
      |       ^
xoranges.cpp: In function 'int query_parni(int)':
xoranges.cpp:8:7: warning: statement has no effect [-Wunused-value]
    8 |  for (a; a>0; a-= a & -a) res^=fen_parni[a];
      |       ^
xoranges.cpp: In function 'void add_neparni(int, int)':
xoranges.cpp:12:7: warning: statement has no effect [-Wunused-value]
   12 |  for (a; a<200010; a+= a & -a) fen_neparni[a]^=v;
      |       ^
xoranges.cpp: In function 'int query_neparni(int)':
xoranges.cpp:16:7: warning: statement has no effect [-Wunused-value]
   16 |  for (a; a>0; a-= a & -a) res^=fen_neparni[a];
      |       ^

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 25 / 25
• Subtask 4: 20 / 20
• Subtask 5: 25 / 25