Submission #3399154
Source Code Expand
#include <bits/stdc++.h> using namespace std ; #define ll long long #define N 200010 int n ; ll a[ N ] ; // xor 性质: a xor b <= a + b // a xor b == a + b 时当且仅当 a & b = 0 //所以a_l xor ... xor a_r == a_l xor ... xor a_r 当且仅当a_l到a_r每一位上只有一个1 //于是这个区间是有单调性的(对于合法的a_l 和 a_r , a_{l+1} 和 a_{r} 显然也合法) //所以用two-pointers搞搞 int main() { scanf( "%d" , &n ) ; for( int i = 1 ; i <= n ; i ++ ) { scanf( "%lld" , &a[ i ] ) ; } int l = 1 , r = 1 , now = 0 ; ll ans = 0 ; while( r <= n ) { while( ( now ^ a[ r ] ) == now + a[ r ] && r <= n ) now |= a[ r ++ ] , ans += r - l ; now ^= a[ l ++ ] ; } printf( "%lld\n" , ans ) ; }
Submission Info
Submission Time | |
---|---|
Task | D - Xor Sum 2 |
User | henry_y |
Language | C++14 (GCC 5.4.1) |
Score | 500 |
Code Size | 771 Byte |
Status | AC |
Exec Time | 21 ms |
Memory | 1792 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:18:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d" , &n ) ; ^ ./Main.cpp:20:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%lld" , &a[ i ] ) ; ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 500 / 500 | ||||
Status |
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Set Name | Test Cases |
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Sample | sample_01.txt, sample_02.txt, sample_03.txt |
All | sample_01.txt, sample_02.txt, sample_03.txt, sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt, subtask_1_26.txt, subtask_1_27.txt, subtask_1_28.txt, subtask_1_29.txt, subtask_1_30.txt, subtask_1_31.txt, subtask_1_32.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
sample_01.txt | AC | 1 ms | 256 KB |
sample_02.txt | AC | 1 ms | 256 KB |
sample_03.txt | AC | 1 ms | 256 KB |
subtask_1_01.txt | AC | 1 ms | 256 KB |
subtask_1_02.txt | AC | 1 ms | 256 KB |
subtask_1_03.txt | AC | 13 ms | 1536 KB |
subtask_1_04.txt | AC | 2 ms | 256 KB |
subtask_1_05.txt | AC | 11 ms | 1152 KB |
subtask_1_06.txt | AC | 8 ms | 768 KB |
subtask_1_07.txt | AC | 2 ms | 256 KB |
subtask_1_08.txt | AC | 9 ms | 896 KB |
subtask_1_09.txt | AC | 13 ms | 1280 KB |
subtask_1_10.txt | AC | 15 ms | 1408 KB |
subtask_1_11.txt | AC | 16 ms | 1536 KB |
subtask_1_12.txt | AC | 20 ms | 1664 KB |
subtask_1_13.txt | AC | 6 ms | 768 KB |
subtask_1_14.txt | AC | 5 ms | 640 KB |
subtask_1_15.txt | AC | 7 ms | 896 KB |
subtask_1_16.txt | AC | 1 ms | 256 KB |
subtask_1_17.txt | AC | 16 ms | 1792 KB |
subtask_1_18.txt | AC | 18 ms | 1792 KB |
subtask_1_19.txt | AC | 18 ms | 1792 KB |
subtask_1_20.txt | AC | 21 ms | 1792 KB |
subtask_1_21.txt | AC | 19 ms | 1792 KB |
subtask_1_22.txt | AC | 21 ms | 1792 KB |
subtask_1_23.txt | AC | 19 ms | 1792 KB |
subtask_1_24.txt | AC | 21 ms | 1792 KB |
subtask_1_25.txt | AC | 19 ms | 1792 KB |
subtask_1_26.txt | AC | 21 ms | 1792 KB |
subtask_1_27.txt | AC | 16 ms | 1792 KB |
subtask_1_28.txt | AC | 16 ms | 1792 KB |
subtask_1_29.txt | AC | 16 ms | 1792 KB |
subtask_1_30.txt | AC | 16 ms | 1792 KB |
subtask_1_31.txt | AC | 16 ms | 1792 KB |
subtask_1_32.txt | AC | 16 ms | 1792 KB |