Submission #1089763

#	Time	Username	Problem	Language	Result	Execution time	Memory
1089763		KasymK	XORanges (eJOI19_xoranges)	C++17	55 / 100	1064 ms	6448 KiB

xoranges

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 2e5+5;
int v[N];

int main(){
    int n, q;
    scanf("%d%d", &n, &q);
    for(int i = 1; i <= n; ++i){
        int x;
        scanf("%d", &x);
        v[i] = x;
    }
    // There is no updates
    while(q--){
        int op;
        scanf("%d", &op);
        if(op == 1){
            int k, u;
            scanf("%d%d", &k, &u);
            v[k] = u;
            continue;
        }
        int l, r;
        scanf("%d%d", &l, &r);
        int wow = r-l+1;
        if(wow%2 == 0){
            puts("0");
            continue;
        }
        int ans = 0;
        for(int i = l; i <= r; i+=2)
            ans ^= (v[i]);
        printf("%d\n", ans);
    }
    return 0;
}

Compilation message (stderr)

xoranges.cpp: In function 'int main()':
xoranges.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d%d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~
xoranges.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~
xoranges.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         scanf("%d", &op);
      |         ~~~~~^~~~~~~~~~~
xoranges.cpp:32:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |             scanf("%d%d", &k, &u);
      |             ~~~~~^~~~~~~~~~~~~~~~
xoranges.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         scanf("%d%d", &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 25 / 25
• Subtask 4: 0 / 20
• Subtask 5: 0 / 25