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Submission #286360

# Submission time Handle Problem Language Result Execution time Memory
286360 2020-08-30T10:25:14 Z TadijaSebez Constellation 3 (JOI20_constellation3) C++11
35 / 100
 1500 ms 115324 KB 
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define ll long long
#define pb push_back
const int N=200050;
const int L=20;
int a[N],lgs[N],n;
pii rmq[N][L];
pii Get(int l,int r){
	int k=lgs[r-l+1];
	return max(rmq[l][k],rmq[r-(1<<k)+1][k]);
}
pii GetRng(int x,int y){
	int top=x,bot=1,mid,L=0,R=n+1;
	while(top>=bot){
		mid=top+bot>>1;
		if(Get(mid,x).first>=y)L=mid,bot=mid+1;
		else top=mid-1;
	}
	top=n,bot=x;
	while(top>=bot){
		mid=top+bot>>1;
		if(Get(x,mid).first>=y)R=mid,top=mid-1;
		else bot=mid+1;
	}
	return {L,R};
}
int x[N],y[N],c[N];
unordered_map<ll,vector<int>> stars;
//vector<int> idx[N];
unordered_map<ll,ll> was;
ll DP(int l,int r){
	if(r-l<2)return 0;
	if(was.count((ll)l*N+r))return was[(ll)l*N+r];
	pii m=Get(l+1,r-1);
	//int fir=upper_bound(idx[m].begin(),idx[m].end(),l)-idx[m].begin();
	//int las=lower_bound(idx[m].begin(),idx[m].end(),r)-idx[m].begin();
	ll ans=DP(l,m.second)+DP(m.second,r);
	if(stars.count((ll)l*N+r))for(int i:stars[(ll)l*N+r])ans=max(ans,DP(l,x[i])+c[i]+DP(x[i],r));
	return was[(ll)l*N+r]=ans;

	/*vector<ll> dp;
	int L=l;
	for(int i=fir;i<las;i++){
		dp.pb(DP(L,idx[m][i]));
		L=idx[m][i];
	}
	dp.pb(DP(L,r));
	ll sum=0;
	for(ll d:dp)sum+=d;
	vector<int> pts=stars[{l,r}];
	sort(pts.begin(),pts.end(),[&](int i,int j){return x[i]<x[j];});
	ll ans=sum;
	L=l;
	int j=0;
	for(int i=fir,o=0;i<las;i++,o++){
		int mx=0;
		while(j<pts.size()&&x[pts[j]]<idx[m][i])mx=max(mx,c[pts[j]]),j++;
		ans=max(ans,sum-dp[o]+mx);
		while(j<pts.size()&&x[pts[j]]==idx[m][i])ans=max(ans,sum+c[pts[j]]),j++;
		printf("%i - ",idx[m][i]);
	}
	printf("|");
	int mx=0;
	while(j<pts.size())mx=max(mx,c[pts[j]]),j++;
	ans=max(ans,sum-dp.back()+mx);
	printf("%i %i %lld\n",l,r,ans);
	return ans;*/
}
int main(){
	scanf("%i",&n);
	for(int i=1;i<=n;i++)scanf("%i",&a[i]),rmq[i][0]={a[i],i};//,idx[a[i]].pb(i);
	a[0]=a[n+1]=n;
	for(int j=1;j<L;j++){
		for(int i=1;i<=n-(1<<j)+1;i++){
			rmq[i][j]=max(rmq[i][j-1],rmq[i+(1<<j-1)][j-1]);
		}
	}
	for(int i=2;i<=n;i++)lgs[i]=lgs[i>>1]+1;
	ll sum=0;
	int m;
	scanf("%i",&m);
	for(int i=1;i<=m;i++){
		scanf("%i %i %i",&x[i],&y[i],&c[i]);
		pii rng=GetRng(x[i],y[i]);
		stars[(ll)rng.first*N+rng.second].pb(i);
		sum+=c[i];
	}
	printf("%lld\n",sum-DP(0,n+1));
	return 0;
}

Compilation message

constellation3.cpp: In function 'std::pair<int, int> GetRng(int, int)':
constellation3.cpp:17:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |   mid=top+bot>>1;
      |       ~~~^~~~
constellation3.cpp:23:10: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   23 |   mid=top+bot>>1;
      |       ~~~^~~~
constellation3.cpp: In function 'int main()':
constellation3.cpp:77:41: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   77 |    rmq[i][j]=max(rmq[i][j-1],rmq[i+(1<<j-1)][j-1]);
      |                                        ~^~
constellation3.cpp:72:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |  scanf("%i",&n);
      |  ~~~~~^~~~~~~~~
constellation3.cpp:73:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   73 |  for(int i=1;i<=n;i++)scanf("%i",&a[i]),rmq[i][0]={a[i],i};//,idx[a[i]].pb(i);
      |                       ~~~~~^~~~~~~~~~~~
constellation3.cpp:83:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   83 |  scanf("%i",&m);
      |  ~~~~~^~~~~~~~~
constellation3.cpp:85:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   85 |   scanf("%i %i %i",&x[i],&y[i],&c[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 3 ms 1024 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 1 ms 512 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 3 ms 1024 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 1 ms 512 KB Output is correct
23 Correct 4 ms 1024 KB Output is correct
24 Correct 4 ms 1024 KB Output is correct
25 Correct 4 ms 1152 KB Output is correct
26 Correct 4 ms 1024 KB Output is correct
27 Correct 5 ms 1024 KB Output is correct
28 Correct 4 ms 1024 KB Output is correct
29 Correct 3 ms 1024 KB Output is correct
30 Correct 4 ms 1024 KB Output is correct
31 Correct 4 ms 1024 KB Output is correct
32 Correct 156 ms 19684 KB Output is correct
33 Correct 126 ms 15972 KB Output is correct
34 Correct 107 ms 14908 KB Output is correct
35 Correct 79 ms 10560 KB Output is correct
36 Correct 73 ms 19048 KB Output is correct
37 Correct 77 ms 18664 KB Output is correct
38 Correct 3 ms 1152 KB Output is correct
39 Correct 6 ms 1536 KB Output is correct
40 Correct 149 ms 20708 KB Output is correct
41 Correct 8 ms 1664 KB Output is correct
42 Correct 6 ms 1536 KB Output is correct
43 Correct 196 ms 29540 KB Output is correct
44 Correct 7 ms 1664 KB Output is correct

Subtask #3
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 3 ms 896 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 3 ms 640 KB Output is correct
14 Correct 2 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 512 KB Output is correct
18 Correct 3 ms 1024 KB Output is correct
19 Correct 1 ms 512 KB Output is correct
20 Correct 1 ms 512 KB Output is correct
21 Correct 3 ms 896 KB Output is correct
22 Correct 1 ms 512 KB Output is correct
23 Correct 4 ms 1024 KB Output is correct
24 Correct 4 ms 1024 KB Output is correct
25 Correct 4 ms 1152 KB Output is correct
26 Correct 4 ms 1024 KB Output is correct
27 Correct 5 ms 1024 KB Output is correct
28 Correct 4 ms 1024 KB Output is correct
29 Correct 3 ms 1024 KB Output is correct
30 Correct 4 ms 1024 KB Output is correct
31 Correct 4 ms 1024 KB Output is correct
32 Correct 156 ms 19684 KB Output is correct
33 Correct 126 ms 15972 KB Output is correct
34 Correct 107 ms 14908 KB Output is correct
35 Correct 79 ms 10560 KB Output is correct
36 Correct 73 ms 19048 KB Output is correct
37 Correct 77 ms 18664 KB Output is correct
38 Correct 3 ms 1152 KB Output is correct
39 Correct 6 ms 1536 KB Output is correct
40 Correct 149 ms 20708 KB Output is correct
41 Correct 8 ms 1664 KB Output is correct
42 Correct 6 ms 1536 KB Output is correct
43 Correct 196 ms 29540 KB Output is correct
44 Correct 7 ms 1664 KB Output is correct
45 Correct 898 ms 63980 KB Output is correct
46 Correct 882 ms 62956 KB Output is correct
47 Correct 912 ms 62820 KB Output is correct
48 Correct 895 ms 63468 KB Output is correct
49 Correct 897 ms 62100 KB Output is correct
50 Correct 868 ms 62012 KB Output is correct
51 Correct 874 ms 62444 KB Output is correct
52 Correct 900 ms 63468 KB Output is correct
53 Correct 884 ms 63080 KB Output is correct
54 Execution timed out 1585 ms 115324 KB Time limit exceeded
55 Halted 0 ms 0 KB -