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#229#5. 「WyOJ Round 1」炽 · 踏浪而歌lgvc1001056ms5980kbC++23916b2025-04-18 14:13:002025-04-18 18:00:32

answer

#include <bits/stdc++.h>
int N,a[100009],ss[1000009];
signed main(void) {
	scanf("%d",&N);
	int su=0,ma=0;
	for(int i=1;i<=N;i++) {
		scanf("%d",&a[i]);
		su+=a[i];
		ma=std::max(ma,a[i]);
	}
	int ans=std::max(ma,(su+1)/2);
	printf("%d\n",ans);
	if(ma<ans&&su%2==1) {
		printf("1 1\n");
		a[1]--;ans--;
	}
	for(int i=1;i<=N;i++) {
		ss[a[i]]++;
	}
	while(ma&&ss[ma]==0) ma--;
	int p1=1,p2=2;
	while(ans>ma) {
		while(p1<=N&&a[p1]==0) p1++;
		if(p2<=p1) p2=p1+1;
		while(p2<=N&&a[p2]==0) p2++;
		printf("%d %d\n",p1,p2);
		ss[a[p1]]--;
		ss[a[p2]]--;
		a[p1]--;
		a[p2]--;
		ss[a[p1]]++;
		ss[a[p2]]++;
		ans--;
		while(ma&&ss[ma]==0) ma--;
	}
	int id;
	for(int i=1;i<=N;i++) {
		if(a[i]==ma) {
			id=i;
		}
	}
	for(int i=1;i<=N;i++) {
		int xx=i,yy=id,va=a[i];
		if(i==id) va=2*ma-su;
		if(xx>yy) std::swap(xx,yy);
		for(int j=1;j<=va;j++) printf("%d %d\n",xx,yy);
	}
}
源文件, 语言: C++23

这程序好像有点Bug，我给组数据试试？

详细

小提示：点击横条可展开更详细的信息

Test #1:

score: 10
Accepted
time: 3ms
memory: 3492kb

input:

6
3 4 1 2 4 6

output:

10
1 2
1 2
1 2
2 3
4 6
4 6
5 6
5 6
5 6
5 6

result:

ok 21 numbers

Test #2:

score: 10
Accepted
time: 69ms
memory: 3276kb

input:

1000
1000 1000 1000 999 996 993 991 991 991 991 991 991 988 988 988 988 987 984 980 980 978 978 977 ...

output:

259517
1 1
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1...

result:

ok 519035 numbers

Test #3:

score: 10
Accepted
time: 104ms
memory: 5980kb

input:

5
93761 154479 466694 134030 151036

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1...

result:

ok 1000001 numbers

Test #4:

score: 10
Accepted
time: 140ms
memory: 3572kb

input:

56700
20 9 3 26 6 14 11 26 15 4 7 7 18 3 55 16 0 2 71 8 21 3 15 21 2 25 38 10 2 15 3 1 3 15 6 2 26 5...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 3
1 3
1 3
1 4
1 4
1 4
1 4
1 4
1 4
1 4
1 4
4 5
4 5
4 5
4...

result:

ok 1000001 numbers

Test #5:

score: 10
Accepted
time: 113ms
memory: 3676kb

input:

18574
19 245 80 2 53 157 18 27 35 19 109 14 30 97 26 10 5 22 142 102 13 114 67 70 142 131 10 177 18 ...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
2 3
2 3
2 3
2 3
2...

result:

ok 1000001 numbers

Test #6:

score: 10
Accepted
time: 137ms
memory: 5592kb

input:

36045
6 62 19 5 21 38 42 13 52 3 10 4 14 65 24 15 9 21 19 24 1 3 2 59 2 19 80 28 9 39 49 26 20 20 14...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2...

result:

ok 1000001 numbers

Test #7:

score: 10
Accepted
time: 105ms
memory: 3652kb

input:

100
442 37503 827 703 10394 1215 23599 313 1705 10819 6152 89 341 3448 778 7153 20397 5166 2735 2100...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1 2
1...

result:

ok 1000001 numbers

Test #8:

score: 10
Accepted
time: 114ms
memory: 3504kb

input:

1000
6 436 820 182 327 3272 993 1042 321 2717 69 4321 706 4565 1280 528 1632 1317 916 125 262 1712 6...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2...

result:

ok 1000001 numbers

Test #9:

score: 10
Accepted
time: 124ms
memory: 3584kb

input:

10000
6 107 38 107 3 28 89 15 30 19 89 2 435 75 45 55 119 125 15 42 101 83 9 134 3 278 292 55 255 2 ...

output:

500000
1 2
1 2
1 2
1 2
1 2
1 2
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2 3
2...

result:

ok 1000001 numbers

Test #10:

score: 10
Accepted
time: 147ms
memory: 3664kb

input:

100000
3 3 62 19 5 21 0 17 21 2 1 36 3 11 2 3 10 22 17 3 10 0 4 3 11 20 11 22 12 12 12 1 10 4 9 6 4 ...

output:

500000
1 2
1 2
1 2
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 4
3 5
3...

result:

ok 1000001 numbers

Extra Test:

score: 0
Extra Test Passed
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