이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define PB push_back
using namespace std;
typedef long double ld;
const int N = 400100;
const ld E = 1e-10;
int a, b, c, d, x, y;
void prit(){
    cout << x << " " << y << '\n';
}
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAL
    cin >> a >> b >> c >> d;
    cout << "0 0\n";
    if (a == 0 && b == 0){
        for (int it = 0; it < c / 2; it++){
            x++; y++;
            prit();
        }
        x--; y++;
        prit();
        for (int it = 1; it < c / 2; it++){
            x--; y--;
            prit();
        }
        for (int it = 1; it < d / 2; it++){
            x--; y++;
            prit();
        }
        x--; y--;
        prit();
        for (int it = 0; it < d / 2; it++){
            x++; y--;
            if (x != 0 || y != 0)
                prit();
        }
        return 0;
    }
    if (a % 2 == 0 && b % 2 == 0 && a > 0 && b > 0){
        for (int it = 0; it < a / 2; it++){
            x++;
            prit();
        }
        for (int it = 0; it < b / 2; it++){
            y++;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x++; y++;
            prit();
        }
        for (int it = 0; it < d / 2; it++){
            x--; y++;
            prit();
        }
        x--;
        prit();
        for (int it = 0; it < d / 2; it++){
            x++; y--;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x--; y--;
            prit();
        }
        for (int it = 1; it < b / 2; it++){
            y--;
            prit();
        }
        for (int it = 1; it < a / 2; it++){
            x--;
            prit();
        }
        return 0;
    }
    if (c % 2 == 0 && c > 0 && a % 2 == 0 && a > 0){
        for (int i = 0; i < a / 2; i++){
            x++;
            prit();
        }
        x++; y++;
        prit();
        for (int i = 0; i < b / 2; i++){
            y++;
            prit();
        }
        for (int i = 1; i < c / 2; i++){
            x++; y++;
            prit();
        }
        for (int i = 0; i < d / 2; i++){
            x--; y++;
            prit();
        }
        x--;
        prit();
        for (int i = 0; i < d / 2; i++){
            x++; y--;
            prit();
        }
        for (int i = 1; i < c / 2; i++){
            x--; y--;
            prit();
        }
        for (int i = 0; i < b / 2; i++){
            y--;
            prit();
        }
        for (int i = 1; i < a / 2; i++){
            x--;
            prit();
        }
        return 0;
    }
    if (d % 2 == 0 && d > 0 && a % 2 == 0 && a > 0){
        for (int i = 0; i < a / 2; i++){
            x++;
            prit();
        }
        x--; y++;
        prit();
        for (int i = 0; i < b / 2; i++){
            y++;
            prit();
        }
        for (int i = 0; i < c / 2; i++){
            x++; y++;
            prit();
        }
        for (int i = 1; i < d / 2; i++){
            x--; y++;
            prit();
        }
        x--;
        prit();
        for (int i = 1; i < d / 2; i++){
            x++; y--;
            prit();
        }
        for (int i = 0; i < c / 2; i++){
            x--; y--;
            prit();
        }
        for (int i = 0; i < b / 2; i++){
            y--;
            prit();
        }
        for (int i = 1; i < a / 2; i++){
            x--;
            prit();
        }
        return 0;
    }
    if (a % 2 == 0 && a > 0 && c % 2 == 1 && d % 2 == 1){
        for (int i = 1; i < a / 2; i++){
            x++;
            prit();
        }
        x++; y++;
        prit();
        for (int it = 0; it < b / 2; it++){
            y++;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x++; y++;
            prit();
        }
        for (int it = 0; it < d / 2; it++){
            x--; y++;
            prit();
        }
        x--;
        prit();
        for (int it = 0; it < d / 2; it++){
            x++; y--;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x--; y--;
            prit();
        }
        for (int it = 1; it < b / 2; it++){
            y--;
            prit();
        }
        for (int i = 0; i < a / 2; i++){
            x--;
            prit();
        }
        return 0;
    }
    if (b % 2 == 0 && b > 0 && c % 2 == 1 && d % 2 == 1){
        for (int i = 1; i < b / 2; i++){
            y++;
            prit();
        }
        x--; y++;
        prit();
        for (int it = 0; it < a / 2; it++){
            x--;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x--; y--;
            prit();
        }
        for (int it = 0; it < d / 2; it++){
            x--; y++;
            prit();
        }
        y--;
        prit();
        for (int it = 0; it < d / 2; it++){
            x++; y--;
            prit();
        }
        for (int it = 0; it < c / 2; it++){
            x++; y++;
            prit();
        }
        for (int it = 1; it < a / 2; it++){
            x++;
            prit();
        }
        for (int i = 0; i < b / 2; i++){
            y--;
            prit();
        }
        return 0;
    }
    if (b % 2 == 0 && b > 0 && c % 2 == 0 && c > 0){
        for (int i = 0; i < b / 2; i++){
            y++;
            prit();
        }
        x--; y--;
        prit();
        for (int it = 0; it < a / 2; it++){
            x--;
            prit();
        }
        for (int it = 1; it < c / 2; it++){
            x--; y--;
            prit();
        }
        for (int it = 0; it < d / 2; it++){
            x--; y++;
            prit();
        }
        y--;
        prit();
        for (int it = 0; it < d / 2; it++){
            x++; y--;
            prit();
        }
        for (int it = 1; it < c / 2; it++){
            x++; y++;
            prit();
        }
        for (int it = 0; it < a / 2; it++){
            x++;
            prit();
        }
        for (int i = 1; i < b / 2; i++){
            y--;
            prit();
        }
        return 0;
    }
    return -1;
}
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