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NOI.AC

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#205507#3658. 删数游戏snow_trace100492ms2032kbC++111.1kb2024-07-07 12:52:552024-07-07 13:20:56

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
int a[100005];int n;
void solve(){
	cin >> n;for(int i = 1;i<=n;i++)cin >> a[i];
	if(n%2 == 1){
		int mid = n+1>>1;
		if(a[mid]<=a[mid-1] or a[mid]<=a[mid+1])cout << a[mid] << '\n';
		else cout << max(a[mid-1],a[mid+1]) << '\n';
	}else{
		int mid = n>>1;
		cout << max(a[mid],a[mid+1]) << '\n';
	}
}
signed main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int t;cin >> t;
	while(t--){
		solve();
	}
	return 0;
}
/*
首先很容易写出 dp。
这个 dp 长得很可爱。
偶数轮取 min 合并,奇数轮取 max 合并。
然后这个很难维护。
考虑二分答案,可以变成 01 序列。
怎么维护呢。怎么维护呢。怎么维护呢。怎么维护呢。
对于 n 是奇数的情况
如果中间是 0 就肯定是 0
否则,中间是1,如果只有这一个 1 就似了
发现如果它左边或者右边有一个就行,否则就一定不行。
对于 n 是偶数的情况
你发现中间只要有一个数是 1 就是 1
否则中间两个数都是 0 
那肯定不行。

有点牛了。
*/

Details

小提示:点击横条可展开更详细的信息

Test #1:

score: 10
Accepted
time: 0ms
memory: 1248kb

input:

10
3
613758771 356937637 286925413
3
309635201 4119573 12672577
3
908539837 376256867 673742215
3
25...

output:

356937637
4119573
376256867
29280187
378806137
500071651
148732984
491253760
231506155
208737943

result:

ok 10 lines

Test #2:

score: 10
Accepted
time: 0ms
memory: 1244kb

input:

10
3
10931386 117297147 159933961
3
90337741 212594593 98873674
3
129454241 303988881 730905561
3
75...

output:

117297147
98873674
303988881
15612529
356387186
550811017
407438865
51789077
107735813
151748426

result:

ok 10 lines

Test #3:

score: 10
Accepted
time: 0ms
memory: 1260kb

input:

10
1000
167905485 208763751 138626601 932784449 228519721 282400288 132186355 15872271 92282711 1325...

output:

403988845
457552801
388265001
10811020
705772900
114763687
659759507
307132303
354245321
52388641

result:

ok 10 lines

Test #4:

score: 10
Accepted
time: 0ms
memory: 1260kb

input:

10
1000
106935067 125402369 613861873 127608150 118554097 28464487 542845281 156683332 14063068 3248...

output:

141900130
846636441
649729872
24210741
613578049
243179119
546303628
238813241
105984529
610132501

result:

ok 10 lines

Test #5:

score: 10
Accepted
time: 1ms
memory: 1256kb

input:

10
1000
411526119 637006177 911588822 496496161 61356302 111514144 542096029 760634253 672439501 662...

output:

461178612
567420205
376347565
196693046
209902232
329106989
136551481
962827830
235347389
593955181

result:

ok 10 lines

Test #6:

score: 10
Accepted
time: 95ms
memory: 2028kb

input:

10
100000
718749825 746785710 27749441 41444821 259131727 172557178 793955441 99599666 163197987 188...

output:

297493249
413115093
708045870
716500401
175485168
799161715
700496161
460682083
241487782
70418526

result:

ok 10 lines

Test #7:

score: 10
Accepted
time: 103ms
memory: 2028kb

input:

10
100000
27978370 4374151 754505581 132813041 320978233 345428200 623829321 71676746 291401501 1585...

output:

104182345
309479031
328440619
146794570
265110993
411769891
633244971
501695415
196061569
544061920

result:

ok 10 lines

Test #8:

score: 10
Accepted
time: 103ms
memory: 2028kb

input:

10
100000
798861877 388220845 79152789 386994909 245031499 68960243 96481409 432630870 15115816 8533...

output:

195962218
260552755
911776641
402660721
119793143
274866561
314728574
503302149
753573121
792835121

result:

ok 10 lines

Test #9:

score: 10
Accepted
time: 97ms
memory: 2032kb

input:

10
100000
499504565 41637903 385913456 724832195 97810294 237878941 44757307 19358717 822946397 6529...

output:

300631009
536510449
579244986
735966766
125851446
712283829
113242101
622967187
165130096
203337377

result:

ok 10 lines

Test #10:

score: 10
Accepted
time: 93ms
memory: 2032kb

input:

10
100000
30813538 582753601 68526921 602383881 25599691 58344973 337240 254442202 56661307 10202082...

output:

387102581
429962248
434239070
27726119
309516446
534466201
454709979
519867587
336570310
80091964

result:

ok 10 lines