Submission #657821

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
657821	2022-11-11 11:31:52	cpp219	XORanges (eJOI19_xoranges)	C++17	100 / 100	191 ms	11248 KiB

xoranges

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#include<bits/stdc++.h>
#define ll int
#define ld double
#define fs first
#define sc second
#define debug(y) cout<<y,exit(0)
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 2e5 + 9;
const ll mod = 1e9 + 7;
ll n,q,a[N];
ll st[4*N][2];
void upd(ll id,ll type,ll l,ll r,ll u,ll val){
    if (u < l||r < u) return;
    if (l == r){
        st[id][type] ^= val; return;
    }
    ll mid = (l + r)/2;
    upd(id*2,type,l,mid,u,val);
    upd(id*2 + 1,type,mid + 1,r,u,val);
    st[id][type] = st[id*2][type] ^ st[id*2 + 1][type];
}
ll Get(ll id,ll type,ll l,ll r,ll u,ll v){
    if (v < l||r < u) return 0;
    if (u <= l&&r <= v) return st[id][type];
    ll mid = (l + r)/2;
    return Get(id*2,type,l,mid,u,v) ^ Get(id*2 + 1,type,mid + 1,r,u,v);
 
 
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Compilation message (stderr)

xoranges.cpp: In function 'int main()':
xoranges.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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