제출 #1174878

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1174878		browntoad	양말 찾기 (KPI13_socks)	C++17	1 / 1	814 ms	840 KiB

socks

#include <bits/stdc++.h>
using namespace std;
#define ll long long
// #define int ll
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define REP1(i, n) FOR(i, 1, n+1)
#define RREP(i, n) for (int i = (n)-1; i >= 0; i--)
#define pii pair<int, int>
#define ppi pair<pii, int>
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (int)((x).size())
#define f first
#define s second
#define pb push_back
//#define endl '\n'
#define IOS() ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)

const ll bloc = 44725;

int toadp[bloc];
int toadm[bloc];
signed main(){
    // IOS();
    int n; cin>>n;
    int x;
    REP(i, n){
        scanf("%d", &x);
        x += 1000000049;
        //assert(x <= 1000000000);
        toadp[x/bloc] ^= x;
        toadm[x%bloc] ^= x;
    }

    int dif = 0;
    REP(i, bloc){
        if (toadp[i] > 0){
            dif++;
        }
    }
    if (dif == 2){
        REP(i, bloc){
            if (toadp[i] > 0) cout<<toadp[i]-1000000049<<' ';
        }
        cout<<endl;
    }
    else {
        REP(i, bloc){
            if (toadm[i] > 0) cout<<toadm[i]-1000000049<<' ';
        }
        cout<<endl;
    }
}

컴파일 시 표준 에러 (stderr) 메시지

socks.cpp: In function 'int main()':
socks.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         scanf("%d", &x);
      |         ~~~~~^~~~~~~~~~

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