CodeForces - 1264B (分類討論即可)

Examples

input

2 2 2 1

output

YES
0 1 0 1 2 3 2

input

1 2 3 4

output

NO

input

2 2 2 3

output

NO

#include <bits/stdc++.h>
#define ll long long
using namespace std;
int a, b, c, d;
int main() {
	cin >> a >> b >> c >> d;
	int cnt = (a > 0) + (b > 0) + (c > 0) + (d > 0);
	//0 0 0 0
	if (cnt == 1) {
		if (a > 0) {
			if (a == 1) { printf("YES\n0"); }
			else printf("NO");
		}
		if (b > 0) {
			if (b == 1) { printf("YES\n1"); }
			else printf("NO");
		}
		if (c > 0) {
			if (c == 1) { printf("YES\n2"); }
			else printf("NO");
		}
		if (d > 0) {
			if (d == 1) { printf("YES\n3"); }
			else printf("NO");
		}
		return 0;
	}

	if (c == d && c == 0 && a == b + 1) {
		printf("YES\n0 ");
		for (int i = 1; i <= b; i++) printf("1 0 ");
		return 0;
	}
	if (a == b && a == 0 && d == c + 1) {
		printf("YES\n3 ");
		for (int i = 1; i <= c; i++) printf("2 3 ");
		return 0;
	}

	
	
	if (a > b || d > c) { printf("NO"); return 0; }





	int p = b - a, q = c - d;


	if (abs(p - q) > 1) { printf("NO"); return 0; }

	puts("YES");
	if (p == q) {
		for (int i = 1; i <= a; i++) printf("0 1 ");
		for (int i = 1; i <= p; i++) printf("2 1 ");
		for (int i = 1; i <= d; i++) printf("2 3 ");
	}
	else if (p < q) {
		for (int i = 1; i <= a; i++) printf("0 1 ");
		for (int i = 1; i <= p; i++) printf("2 1 ");
		for (int i = 1; i <= d; i++) printf("2 3 ");
		printf("2");
	}
	else {
		printf("1 ");
		for (int i = 1; i <= a; i++) printf("0 1 ");
		for (int i = 1; i <= q; i++) printf("2 1 ");
		for (int i = 1; i <= d; i++) printf("2 3 ");
	}
	return 0;
}