제출 #1196143

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1196143		cpdreamer	XORanges (eJOI19_xoranges)	C++20	55 / 100	1093 ms	2116 KiB

xoranges

#include <vector>
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define V vector
using namespace std;
typedef long long ll;
#define all(v) v.begin(), v.end()
#define P pair
#define F first
#define S second
const ll MOD=(ll)1e9+7;
void file() {
    freopen("input.txt.txt", "r", stdin);
    freopen("output.txt.txt", "w", stdout);
}
void solve() {
    int n,q;
    cin>>n>>q;
    V<int>a(n+1);
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    while(q--){
        int type;
        cin>>type;
        if(type==1){
            int id,v;
            cin>>id>>v;
            a[id]=v;
        }
        else{
            int l,r;
            cin>>l>>r;
            if((r-l+1)%2==0){
                cout<<0<<endl;
            }
            else{
                int ans=0;
                for(int i=l;i<=r;i+=2){
                    ans^=a[i];
                }
                cout<<ans<<endl;
            }
        }

    }
}

int main(){
   // file();
    solve();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

xoranges.cpp: In function 'void file()':
xoranges.cpp:14:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     freopen("input.txt.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xoranges.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("output.txt.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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