#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <deque>
#include <fstream>
#include <iterator>
#include <set>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cctype>
#include <string>
#include <cassert>
#include <set>
#include <bitset>
#include <unordered_set>
using ll = int64_t;
#define pb push_back
#define all(a) a.begin(),a.end()
#define ppi pair<pair<int,int>,int>
#define fast ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
//#define int int64_t
// xcode cant include bits/stdc++.h
using namespace std;
//ifstream fin ("sleepy.in");
//ofstream fout ("sleepy.out");
/* /\_/\
* (= ._.)
* / > \>
*/
// encouraging cat
const int INF = 10000000000000000;
const int mod = 1000000007;
const int MAXN = 100;
struct node
{
int even,odd;
};
vector<pair<int,int>> t;
vector<int> a;
pair<int,int> merge(int v)
{
t[v].first = t[v * 2].first ^ t[v * 2 + 1].first;
t[v].second = t[v * 2].second ^ t[v * 2 + 1].second;
return t[v];
}
void build(int v, int tl, int tr)
{
if (tl == tr)
{
if (tl % 2 == 0)
t[v].first = a[tl];
else
t[v].second = a[tl];
}
else
{
int tm = (tl + tr) / 2;
build(v*2, tl, tm);
build(v*2+1, tm+1, tr);
merge(v);
}
}
int query(int v, int tl, int tr, int l, int r) {
if (l > r)
return 0;
if (l == tl && r == tr)
{
if (l % 2 == 0)
return t[v].first;
return t[v].second;
}
int tm = (tl + tr) / 2;
return query(v*2, tl, tm, l, min(r, tm))
+ query(v*2+1, tm+1, tr, max(l, tm+1), r);
}
void update(int v, int tl, int tr, int pos, int new_val) {
if (tl == tr) {
if (tr % 2 == 0)
t[v].first = new_val;
else
t[v].second = new_val;
} else {
int tm = (tl + tr) / 2;
if (pos <= tm)
update(v*2, tl, tm, pos, new_val);
else
update(v*2+1, tm+1, tr, pos, new_val);
merge(v);
}
}
int32_t main() {
int n,q;
cin >> n >> q;
a.resize(n);
t.resize(MAXN);
for (int i = 0;i < n;i++)
cin >> a[i];
build(1, 0, n - 1);
bool ok = true;
while (q--)
{
int t;
cin >> t;
if (t == 1)
{
int i,v;
cin >> i >> v;
i--;
a[i] = v;
update(1, 0, n - 1, i, v);
}
else
{
int l,r;
cin >> l >> r;
l--;
r--;
if ((l - r + 1) % 2 == 0)
{
cout << 0 << '\n';
continue;
}
else if (l - r + 1 == 2)
{
int cr = a[l];
cr ^= a[r];
cout << cr << '\n';
continue;
}
cout << query(1, 0, n - 1, l, r) << '\n';
}
}
return 0;
}
Compilation message
xoranges.cpp:32:9: warning: "/*" within comment [-Wcomment]
32 | /* /\_/\
|
xoranges.cpp:37:17: warning: overflow in conversion from 'long int' to 'int' changes value from '10000000000000000' to '1874919424' [-Woverflow]
37 | const int INF = 10000000000000000;
| ^~~~~~~~~~~~~~~~~
xoranges.cpp: In function 'int32_t main()':
xoranges.cpp:106:10: warning: unused variable 'ok' [-Wunused-variable]
106 | bool ok = true;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
53 ms |
4004 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
| 2 |
Halted |
0 ms |
0 KB |
- |
