oj.uz

Submission #407268

# Submission time Handle Problem Language Result Execution time Memory
407268 2021-05-18T16:53:43 Z anime Street Lamps (APIO19_street_lamps) C++14
100 / 100
 3349 ms 57792 KB 
#include <bits/stdc++.h>
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class T> using ordered_set = tree<T,null_type,less_equal<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define int long long
#define pb push_back
#define pii pair<int,int>
#define fr first
#define sc second
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define endi puts("");
#define ret return
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
const int N = 3e5+5,INF = 1e18+7;
int q[N],z[N],xo;
char s[N];
vector <pair<pii,int>> der[4*N];

void update(int v,int l,int r,int ql,int qr,int lol,int ror,int cost){
	
	if (l > qr || r < ql)ret ;
	if (ql <= l && r <= qr){
		der[v].pb({{lol,ror},cost});
		ret ;
	}
	int m = l+r>>1;
	update(v<<1,l,m,ql,qr,lol,ror,cost);
	update(v<<1|1,m+1,r,ql,qr,lol,ror,cost);
}

int get_ans(int v,int l,int r,int pos,int x){
	
	int ans=0;
	for (pair<pii,int> z: der[v])
		if (z.fr.fr <= x && x <= z.fr.sc)
			ans += z.sc,xo^=1;
	
	if (l == r)ret ans;
	int m = l+r>>1;
	if (pos > m)
		ret get_ans(v<<1|1,m+1,r,pos,x)+ans;
	ret get_ans(v<<1,l,m,pos,x)+ans;
	
}




main(){
	int n,t,i;
	scanf("%lld%lld",&n,&t);
	scanf("%s",s+1);
	s[0] = s[n+1] = '0';
	set <int> as;
	for (i=0;i<=n+1;++i)
		if (s[i] == '0')as.insert(i);
	for (i=0;i<=n+1;++i){
		if(s[i] == '0') continue;
		int j=i;
		while(j <= n+1 && s[j] == s[i]) j++;
		update(1, 1, n, i, j-1, i, j-1, 0);
		i = j - 1;
	}
	for (i=1;i<=t;++i){
		string ss;
		cin>>ss;
		if (ss == "query"){
			int l,r;
			cin>>l>>r, r--;
			xo = 0;
			int ans = get_ans(1,1,n,l,r);
			if (xo)ans += i;
			cout <<ans<<"\n";
		}
		else {
			int pos;
			cin>>pos;
			if (s[pos] == '0'){
				as.erase(pos);
				int l = *--as.upper_bound(pos);
				int r = *as.lower_bound(pos);
				update(1,1,n,l+1,pos,pos,r-1,-i);
				s[pos] = '1';
			} 
			else {
				int l = *--as.upper_bound(pos);
				int r = *as.lower_bound(pos);
				update(1,1,n,l+1,pos,pos,r-1,i);
				s[pos] = '0';
				as.insert(pos);
				
			}
			
		}
	}
	
	
}

Compilation message

street_lamps.cpp: In function 'void update(long long int, long long int, long long int, long long int, long long int, long long int, long long int, long long int)':
street_lamps.cpp:33:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   33 |  int m = l+r>>1;
      |          ~^~
street_lamps.cpp: In function 'long long int get_ans(long long int, long long int, long long int, long long int, long long int)':
street_lamps.cpp:46:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |  int m = l+r>>1;
      |          ~^~
street_lamps.cpp: At global scope:
street_lamps.cpp:56:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   56 | main(){
      | ^~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:58:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |  scanf("%lld%lld",&n,&t);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
street_lamps.cpp:59:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |  scanf("%s",s+1);
      |  ~~~~~^~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 21 ms 28400 KB Output is correct
3 Correct 18 ms 28456 KB Output is correct
4 Correct 19 ms 28472 KB Output is correct
5 Correct 18 ms 28492 KB Output is correct
6 Correct 18 ms 28492 KB Output is correct
7 Correct 19 ms 28428 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1251 ms 38276 KB Output is correct
2 Correct 826 ms 40028 KB Output is correct
3 Correct 676 ms 42436 KB Output is correct
4 Correct 957 ms 52184 KB Output is correct
5 Correct 994 ms 49896 KB Output is correct
6 Correct 883 ms 53476 KB Output is correct
7 Correct 965 ms 49424 KB Output is correct
8 Correct 899 ms 36676 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 19 ms 28492 KB Output is correct
3 Correct 19 ms 28492 KB Output is correct
4 Correct 20 ms 28492 KB Output is correct
5 Correct 969 ms 54036 KB Output is correct
6 Correct 959 ms 52808 KB Output is correct
7 Correct 976 ms 49292 KB Output is correct
8 Correct 911 ms 36644 KB Output is correct
9 Correct 613 ms 32124 KB Output is correct
10 Correct 681 ms 32452 KB Output is correct
11 Correct 673 ms 32652 KB Output is correct
12 Correct 992 ms 49268 KB Output is correct
13 Correct 911 ms 36612 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 17 ms 28424 KB Output is correct
3 Correct 17 ms 28496 KB Output is correct
4 Correct 17 ms 28492 KB Output is correct
5 Correct 960 ms 45980 KB Output is correct
6 Correct 898 ms 49316 KB Output is correct
7 Correct 850 ms 53060 KB Output is correct
8 Correct 745 ms 57792 KB Output is correct
9 Correct 583 ms 44008 KB Output is correct
10 Correct 321 ms 45752 KB Output is correct
11 Correct 574 ms 44148 KB Output is correct
12 Correct 320 ms 45632 KB Output is correct
13 Correct 585 ms 43828 KB Output is correct
14 Correct 320 ms 45496 KB Output is correct
15 Correct 978 ms 49268 KB Output is correct
16 Correct 921 ms 36676 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 28492 KB Output is correct
2 Correct 21 ms 28400 KB Output is correct
3 Correct 18 ms 28456 KB Output is correct
4 Correct 19 ms 28472 KB Output is correct
5 Correct 18 ms 28492 KB Output is correct
6 Correct 18 ms 28492 KB Output is correct
7 Correct 19 ms 28428 KB Output is correct
8 Correct 1251 ms 38276 KB Output is correct
9 Correct 826 ms 40028 KB Output is correct
10 Correct 676 ms 42436 KB Output is correct
11 Correct 957 ms 52184 KB Output is correct
12 Correct 994 ms 49896 KB Output is correct
13 Correct 883 ms 53476 KB Output is correct
14 Correct 965 ms 49424 KB Output is correct
15 Correct 899 ms 36676 KB Output is correct
16 Correct 18 ms 28492 KB Output is correct
17 Correct 19 ms 28492 KB Output is correct
18 Correct 19 ms 28492 KB Output is correct
19 Correct 20 ms 28492 KB Output is correct
20 Correct 969 ms 54036 KB Output is correct
21 Correct 959 ms 52808 KB Output is correct
22 Correct 976 ms 49292 KB Output is correct
23 Correct 911 ms 36644 KB Output is correct
24 Correct 613 ms 32124 KB Output is correct
25 Correct 681 ms 32452 KB Output is correct
26 Correct 673 ms 32652 KB Output is correct
27 Correct 992 ms 49268 KB Output is correct
28 Correct 911 ms 36612 KB Output is correct
29 Correct 18 ms 28492 KB Output is correct
30 Correct 17 ms 28424 KB Output is correct
31 Correct 17 ms 28496 KB Output is correct
32 Correct 17 ms 28492 KB Output is correct
33 Correct 960 ms 45980 KB Output is correct
34 Correct 898 ms 49316 KB Output is correct
35 Correct 850 ms 53060 KB Output is correct
36 Correct 745 ms 57792 KB Output is correct
37 Correct 583 ms 44008 KB Output is correct
38 Correct 321 ms 45752 KB Output is correct
39 Correct 574 ms 44148 KB Output is correct
40 Correct 320 ms 45632 KB Output is correct
41 Correct 585 ms 43828 KB Output is correct
42 Correct 320 ms 45496 KB Output is correct
43 Correct 978 ms 49268 KB Output is correct
44 Correct 921 ms 36676 KB Output is correct
45 Correct 3349 ms 35012 KB Output is correct
46 Correct 522 ms 35328 KB Output is correct
47 Correct 537 ms 40176 KB Output is correct
48 Correct 913 ms 51788 KB Output is correct
49 Correct 737 ms 32580 KB Output is correct
50 Correct 736 ms 32652 KB Output is correct
51 Correct 749 ms 32820 KB Output is correct
52 Correct 791 ms 32996 KB Output is correct
53 Correct 774 ms 32972 KB Output is correct
54 Correct 770 ms 32952 KB Output is correct