QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#123743#5374. 数圈fzj2007100 ✓144ms13824kbC++142.6kb2023-07-13 14:39:152023-07-13 14:39:16

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-07-13 14:39:16]
  • 评测
  • 测评结果:100
  • 用时:144ms
  • 内存:13824kb
  • [2023-07-13 14:39:15]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
template<typename T>inline void read(T &x){
	x=0;
	char ch=getchar();
	bool flag=0;
	while(ch>'9'||ch<'0') flag=flag||ch=='-',ch=getchar();
	while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar();
	x=flag?-x:x;
}
template<typename T,typename ...Args>inline void read(T &x,Args &...args){
	read(x),read(args...);
}
template<typename T>inline void prt(T x){
	if(x>9) prt(x/10);
	putchar(x%10+'0');
}
template<typename T>inline void put(T x){
	if(x<0) putchar('-'),x=-x;
	prt(x);
}
template<typename T>inline void put(char ch,T x){
	put(x),putchar(ch);
}
template<typename T,typename ...Args>inline void put(char ch,T x,Args ...args){
	put(ch,x),put(ch,args...);
}
#define N 200005
#define ll long long
int T,n,w[N];
ll a[N],b[N],s[N];
bool vis[N];
struct BIT{
	int c[N];
	BIT(){memset(c,0,sizeof(c));}
	inline void clear(){
		for(int i=1;i<=n;i++) c[i]=0;
	}
	#define lowbit(x) (x&-x)
	inline void update(int x,int v){
		for(;x<=n;x+=lowbit(x)) c[x]+=v;
	}
	inline int query(int x){
		int res=0;
		for(;x;x^=lowbit(x)) res+=c[x];
		return res;
	}
	#undef lowbit
}B,C;
inline void solve(){
	read(n),B.clear(),C.clear();
	for(int i=1;i<=n+n;i++) s[i]=w[i]=vis[i]=0;
	for(int i=1;i<=n;i++) read(w[i]);
	if(*min_element(w+1,w+n+1)>=0) return puts("0"),void();
	for(int i=1;i<=n+n;i++) s[i]=s[i-1]+w[(i-1)%n+1];
	if(s[n]<=0) return puts("-1"),void();
	int k=max_element(s+1,s+n+n+1)-s-n,num=0;
	for(int i=1;i<=n+n;i++) s[i]=0;
	for(int i=k+1;i<=n;i++) a[++num]=w[i];
	for(int i=1;i<=k;i++) a[++num]=w[i];
	for(int i=1;i<=n;i++) w[i]=a[i];
	for(int i=1;i<=n;i++) s[i]=s[i-1]+w[i];
	for(int i=1;i<=n;i++) assert(s[i]<=s[n]);
	long long ans=0;
	vector<pair<ll,int> >t;
	for(int i=1;i<=n;i++){
		if(s[i]<0){
			vis[i]=1;
			ll v=(-s[i]-1)/s[n]+1;
			t.emplace_back(v,i);
			s[i]+=v*s[n],ans+=i+(v-1)*(n-1);
		}
	}
	sort(t.begin(),t.end());
	if(t.size()){
		long long presum=0,sufnum=t.size()-1;
		for(int i=0;i<t.size();i++) C.update(t[i].second,1);
		for(int i=0,j=0;i<t.size();i++){
			while(j<i&&t[j].first<=t[i].first) presum+=t[j].first,C.update(t[j].second,-1),j++,sufnum--;
			ans-=presum+sufnum*(t[i].first-1)+C.query(t[i].second-1);
		}	
	}
	num=0;
	for(int i=1;i<n;i++)
		if(!vis[i]) a[++num]=s[i];
	for(auto v:t) a[++num]=s[v.second];
	a[++num]=s[n];
	for(int i=1;i<=n;i++) b[i]=a[i];
	sort(b+1,b+n+1),num=unique(b+1,b+n+1)-b-1;
	for(int i=1;i<=n;i++){
		a[i]=lower_bound(b+1,b+num+1,a[i])-b;
		ans+=B.query(n)-B.query(a[i]),B.update(a[i],1);
	}
	put('\n',ans);
}
int main(){
	read(T);
	while(T--) solve();
	return 0;
}

详细

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 2ms
memory: 8844kb

input:

10
3
2 -9 -4
3
4 6 0
3
3 -10 0
3
7 -6 3
3
-6 7 10
3
-3 9 -2
3
6 1 -2
3
5 2 -2
3
-9 -5 7
3
-4 -5 6

output:

-1
0
-1
3
1
4
2
1
-1
-1

result:

ok 10 lines

Subtask #2:

score: 20
Accepted

Dependency #1:

100%
Accepted

Test #2:

score: 20
Accepted
time: 2ms
memory: 8684kb

input:

10
50
-5 -5 3 8 0 0 3 8 5 -7 6 -9 5 5 2 7 -9 1 -7 5 0 10 -6 -2 -6 -8 9 7 4 3 -9 9 5 9 8 1 7 0 0 -5 -1 -3 5 -7 5 -4 6 8 -1 1
50
-6 4 3 -6 -9 -8 -5 -2 -10 7 -4 1 -1 -5 2 1 -10 8 8 7 -8 -5 3 -6 10 3 2 -1 10 0 4 -6 9 3 -6 3 9 -4 4 -2 -3 4 -9 -7 7 1 5 2 -4 5
50
2 -10 5 3 -1 1 9 -1 -5 3 -2 -10 7 0 5 -5 -1...

output:

161
-1
249
-1
21873
-1
452
-1
-1
314

result:

ok 10 lines

Subtask #3:

score: 30
Accepted

Dependency #2:

100%
Accepted

Test #3:

score: 30
Accepted
time: 1ms
memory: 9172kb

input:

10
2000
-4438 -448 2902 3873 -5348 1821 -5284 2787 -1369 -4712 3298 2808 1651 -4568 4377 870 2217 -2683 1217 120 -3854 1156 -2129 -3757 -2704 3026 -1745 -5327 -1315 405 3944 340 -1510 2213 -24 -32 -5414 -2330 760 3715 -4871 2831 1917 3148 1360 -3662 -4281 -1248 788 1334 -3401 2050 4174 3163 -2456 33...

output:

90206708583
9272643195
2640993721
148400379
20504656
2904294
-1
6666669000000
61998
67150

result:

ok 10 lines

Subtask #4:

score: 10
Accepted

Test #4:

score: 10
Accepted
time: 38ms
memory: 10980kb

input:

10
30000
-3879 -556 4570 1863 2815 -4010 2471 -270 2835 3071 -3331 -1251 -2243 4221 -5249 -4134 3376 1978 858 2545 -4207 386 3875 2029 1706 1119 3065 -3097 4399 4385 -3021 2473 2506 2157 3946 -886 3929 1478 2728 -4239 4091 -151 -4762 -2136 -1424 2162 -669 267 190 -1180 2640 -757 -2078 -1409 3165 216...

output:

121860198793245
46938573692959
57703965834328
59944493006183
81807878531011
49309954483988
78546660217267
113040545520897
33896072757379
62212580026212

result:

ok 10 lines

Subtask #5:

score: 10
Accepted

Dependency #4:

100%
Accepted

Test #5:

score: 10
Accepted
time: 40ms
memory: 10840kb

input:

10
30000
-2595 -3716 4165 858 -5266 -3829 811 -2088 3328 3550 4682 -4106 1810 -1775 -470 189 2599 -4024 2125 1382 2756 3173 1951 975 3411 389 4564 3431 -4952 4333 -2522 2676 2205 -105 -3087 -1781 4430 2299 4505 1113 -826 312 1429 52 -985 2395 2056 -2832 1613 -3243 3271 2772 -2816 -3652 4580 1365 123...

output:

-1
66307718106454
20087854603233
17527604892002
14265304369524
24031060577728
6589862789507
11905532141244
8996204627296
6585172490432

result:

ok 10 lines

Subtask #6:

score: 10
Accepted

Dependency #5:

100%
Accepted

Test #6:

score: 10
Accepted
time: 53ms
memory: 10768kb

input:

10
30000
-2244 -2644 2809 3538 -285 1898 -2058 -24 2091 2790 -2955 1099 -5143 1121 -3846 -999 -4595 3085 3334 -4501 -5091 358 -3560 -3527 4423 2862 4342 -2080 4525 2521 4106 -5224 1559 3007 -398 4417 -351 -5309 2315 3950 -1249 3651 -2944 -3367 3232 -1595 2952 -2194 4228 -4421 -4415 -88 -2072 3485 -1...

output:

85413029344138
4691174120217
246528544689
26919261466
816932685
45240604
-1
22499999825000000
1482487
1674097

result:

ok 10 lines

Subtask #7:

score: 10
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Dependency #4:

100%
Accepted

Dependency #5:

100%
Accepted

Dependency #6:

100%
Accepted

Test #7:

score: 10
Accepted
time: 144ms
memory: 13824kb

input:

10
100000
-295 3757 395 376 4467 -4688 -3479 1495 -2386 687 -1139 4137 2777 4198 2479 3744 -1902 1207 3000 -5091 1112 2776 -1673 4050 -5247 -3011 -1961 2442 -5024 3036 226 3508 2020 -1793 4283 3340 -115 2844 -3134 -847 -4850 3377 -1756 3602 4408 4043 69 -4157 -2612 3591 2041 -1034 4648 3484 -1086 12...

output:

1335845168539966
35870296157487
1936542233238
42129253701
1713350305
3538646
-1
833333331000000000
4603056
4382225

result:

ok 10 lines