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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
#292765#7417. Honorable MentionDaiRuiChen007WA 1077ms33724kbC++172.2kb2023-12-28 12:52:452023-12-28 12:52:45

Judging History

你现在查看的是最新测评结果

  • [2023-12-28 12:52:45]
  • 评测
  • 测评结果:WA
  • 用时:1077ms
  • 内存:33724kb
  • [2023-12-28 12:52:45]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
#define sz(v) int(v.size())
using namespace std;
const int MAXN=35005;
const ll inf=1e12;
typedef vector<ll> poly;
poly operator *(const poly &f,const poly &g) {
	if(f.empty()||g.empty()) return {};
	poly h(sz(f)+sz(g)-1);
	int i=1,j=1,k=1; h[0]=f[0]+g[0];
	while(i<sz(f)&&j<sz(g)) {
		if(f[i]-f[i-1]>g[j]-g[j-1]) h[k]=h[k-1]+f[i]-f[i-1],++i,++k;
		else h[k]=h[k-1]+g[j]-g[j-1],++j,++k;
	}
	while(i<sz(f)) h[k]=h[k-1]+f[i]-f[i-1],++i,++k;
	while(j<sz(g)) h[k]=h[k-1]+g[j]-g[j-1],++j,++k;
	return h;
}
int n,q,a[MAXN];
poly tr[MAXN<<2][2][2],f0,f1;
void build(int l=1,int r=n,int p=1) {
	if(l==r) {
		tr[p][0][0]={0,a[l]},tr[p][0][1]=tr[p][1][0]=tr[p][1][1]={-inf,a[l]};
		return ;
	}
	int mid=(l+r)>>1;
	build(l,mid,p<<1),build(mid+1,r,p<<1|1);
	for(int i:{0,1}) for(int j:{0,1}) {
		f0=tr[p<<1][i][0]*tr[p<<1|1][0][j];
		f1=tr[p<<1][i][1]*tr[p<<1|1][1][j];
		tr[p][i][j].resize(r-l+2);
		for(int k=0;k<=r-l;++k) tr[p][i][j][k]=max(f0[k],f1[k+1]);
		tr[p][i][j][r-l+1]=f0[r-l+1];
	}
}
struct info {
	ll v; int c;
	friend info operator +(info x,info y) { return {x.v+y.v,x.c+y.c}; }
	friend bool operator <(info x,info y) { return x.v==y.v?x.c<y.c:x.v<y.v; }
};
typedef array<array<info,2>,2> mat;
info eval(poly &f,ll d) {
	int l=1,r=sz(f)-1,p=0;
	while(l<=r) {
		int mid=(l+r)>>1;
		if(f[mid]-f[mid-1]>=d) l=mid+1,p=mid;
		else r=mid-1;
	}
	return {f[p]-d*p,p};
}
mat qry(int ul,int ur,ll d,int l=1,int r=n,int p=1) {
	if(ul<=l&&r<=ur) {
		mat f;
		for(int i:{0,1}) for(int j:{0,1}) f[i][j]=eval(tr[p][i][j],d);
		return f;
	}
	int mid=(l+r)>>1;
	if(ur<=mid) return qry(ul,ur,d,l,mid,p<<1);
	if(mid<ul) return qry(ul,ur,d,mid+1,r,p<<1|1);
	mat f=qry(ul,ur,d,l,mid,p<<1),g=qry(ul,ur,d,mid+1,r,p<<1|1),h;
	for(int i:{0,1}) for(int j:{0,1}) {
		h[i][j]=max(f[i][0]+g[0][j],f[i][1]+g[1][j]+info{d,-1});
	}
	return h;
}
signed main() {
	scanf("%d%d",&n,&q);
	for(int i=1;i<=n;++i) scanf("%d",&a[i]);
	build();
	for(int l,r,k;q--;) {
		scanf("%d%d%d",&l,&r,&k);
		ll L=-2e9,R=2e9,d=R;
		while(L<=R) {
			ll mid=(L+R)>>1;
			if(qry(l,r,mid)[0][0].c<=k) R=mid-1,d=mid;
			else L=mid+1;
		}
		printf("%lld\n",qry(l,r,d)[0][0].v+k*d);
	}
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 17024kb

input:

5 5
-1 2 -3 4 -5
1 5 1
1 5 2
1 5 3
1 5 4
1 5 5

output:

4
6
5
2
-3

result:

ok 5 number(s): "4 6 5 2 -3"

Test #2:

score: 0
Accepted
time: 0ms
memory: 16944kb

input:

5 1
7 7 7 7 7
1 5 1

output:

35

result:

ok 1 number(s): "35"

Test #3:

score: -100
Wrong Answer
time: 1077ms
memory: 33724kb

input:

25000 25000
-11889 -16468 18402 -13238 14125 12120 -3295 -12106 20152 7478 8575 9968 -13946 -13408 23715 -14670 -21837 12589 7029 20609 2868 12728 -6942 982 5884 -7561 -2058 -7892 7806 16344 14645 13904 7355 9860 15446 -539 24072 21969 19028 -24939 -21911 -11836 21045 -4727 -3882 2138 18513 -4796 -1...

output:

10342053
44514177
6687268
77971944
99605102
107726056
15473041
17383093
62018237
10703102
41214044
22949449
9407209
9022260
39351814
72311293
5178065
42027491
52701707
38135774
37045964
4761513
16326256
16812497
107987457
28306484
46710957
864270
102812861
27960495
50366764
16379719
2791377
21113338...

result:

wrong answer 1st numbers differ - expected: '10341941', found: '10342053'