Submission #136597

# Submission time Handle Problem Language Result Execution time Memory
136597 2019-07-25T17:36:59 Z liwi Street Lamps (APIO19_street_lamps) C++11
100 / 100
4967 ms 228940 KB
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;

#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);

#define MAXN 300005
#define MAXS 22000000

typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;

mt19937 g1(time(0));

int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}

ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll  b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}

int cnt;

struct node{
//	int l,r;
	int lft,rgt;
//	ll lazy0,lazy1;
	int sum;
	short cnt; //lazy0 for sum, lazy1 for cnt
//	node *lft,*rgt;
//
//	node(int l, int r){
//		this->l = l;
//		this->r = r;
//		this->lazy0 = this->lazy1 = this->sum = this->cnt = 0;
//		lft = rgt = 0;
//	}
};

int len,num_q,arr[MAXN],rt[MAXN];
node seg[MAXS];
set<int> zeros;
//
//inline void build_needed(int rt){
//	if(!seg[rt].lft){
//		seg[rt].lft = ++cnt;
//		seg[cnt] = {0,0,0,0};
//	}
//	if(!seg[rt].rgt){
//		seg[rt].rgt = ++cnt;
//		seg[cnt] = {0,0,0,0};
//	}
//}

//inline void push_down(int rt){
//	build_needed(rt);
//	seg[seg[rt].lft].lazy0+=seg[rt].lazy0, seg[seg[rt].rgt].lazy0+=seg[rt].lazy0;
//	seg[seg[rt].lft].sum+=seg[rt].lazy0, seg[seg[rt].rgt].sum+=seg[rt].lazy0;
//
//	seg[seg[rt].lft].lazy1+=seg[rt].lazy1, seg[seg[rt].rgt].lazy1+=seg[rt].lazy1;
//	seg[seg[rt].lft].cnt+=seg[rt].lazy1, seg[seg[rt].rgt].cnt+=seg[rt].lazy1;
//
//	seg[rt].lazy0 = seg[rt].lazy1 = 0;
//}

void update(int sl, int sr, int pos, int rt, int sumv, int cntv){
	if(sl == sr){
		seg[rt].sum+=sumv;
		seg[rt].cnt+=cntv;
		return;
	}
//	if(seg[rt].lazy0 || seg[rt].lazy1) push_down(rt);
//	build_needed(rt);
	int mid = (sl+sr)>>1;
	if(pos <= mid){
		if(!seg[rt].lft){
			seg[rt].lft = ++cnt;
			seg[cnt] = {0,0,0,0};
		}
		update(sl,mid,pos,seg[rt].lft,sumv,cntv);
	}else{
		if(!seg[rt].rgt){
			seg[rt].rgt = ++cnt;
			seg[cnt] = {0,0,0,0};
		}
		update(mid+1,sr,pos,seg[rt].rgt,sumv,cntv);
	}
	seg[rt].sum = seg[seg[rt].lft].sum+seg[seg[rt].rgt].sum;
	seg[rt].cnt = seg[seg[rt].lft].cnt+seg[seg[rt].rgt].cnt;
}

pll query(int sl, int sr, int pos, int rt){
	if(sl == sr){
		return mp(seg[rt].sum,seg[rt].cnt);
//		if(s == 0) return seg[rt].sum;
//		return seg[rt].cnt;
	}
//	if(seg[rt].lazy0 || seg[rt].lazy1) push_down(rt);
//	build_needed(rt);
	int mid = (sl+sr)>>1;
	if(pos <= mid){
		if(!seg[rt].lft) return mp(0,0);
		return query(sl,mid,pos,seg[rt].lft);
	}
	if(!seg[rt].rgt) return mp(seg[seg[rt].lft].sum,seg[seg[rt].lft].cnt);
	pll t = query(mid+1,sr,pos,seg[rt].rgt);
	t.first+=seg[seg[rt].lft].sum;
	t.second+=seg[seg[rt].lft].cnt;
	return t;
}

inline void bupdate(int xl, int xr, int l, int r, int sv, int cv){
//	for(int i=xl; i<=xr; i++)
//		bit[i].update(l,r,bit[i].rt,v);
	for(int i=xl; i<=len+1; i+=i&-i){
		if(!rt[i]){
			rt[i] = ++cnt;
			seg[cnt] = {0,0,0,0};
		}
		update(1,len+1,l,rt[i],sv,cv);
		if(r+1 <= len+1)
			update(1,len+1,r+1,rt[i],-sv,-cv);
	}
//		bit[i].update(l,r,bit[i].rt,v,s);
//	if(r < len+1){
		for(int i=xr+1; i<=len+1; i+=i&-i){
			if(!rt[i]){
				rt[i] = ++cnt;
				seg[cnt] = {0,0,0,0};
			}
			update(1,len+1,l,rt[i],-sv,-cv);
			if(r+1 <= len+1)
				update(1,len+1,r+1,rt[i],sv,cv);
//		update(1,len+1,l,r,rt[i],-v,s);
		}
//	}
//		bit[i].update(l,r,bit[i].rt,-v,s);
}

inline pll bquery(int a, int b){
	pll res = mp(0,0); //sum,cnt
//	res = bit[a].query(b,bit[a].rt);
	for(int i=a; i>0; i-=i&-i){
		if(!rt[i]) continue;
		pll t = query(1,len+1,b,rt[i]);
		res.first+=t.first;
		res.second+=t.second;
	}
//		res+=bit[i].query(b,bit[i].rt,s);
	return res;
}

//inline void cupdate(int xl, int xr, int l, int r, ll v){
////	for(int i=xl; i<=xr; i++)
////		cnt[i].update(l,r,cnt[i].rt,v);
//	for(int i=xl; i<=len+1; i+=i&-i)
//		cnt[i].update(l,r,cnt[i].rt,v);
//	for(int i=xr+1; i<=len+1; i+=i&-i)
//		cnt[i].update(l,r,cnt[i].rt,-v);
//}
//
//inline ll cquery(int a, int b){
//	ll res = 0;
////	res = cnt[a].query(b,cnt[a].rt);
//	for(int i=a; i>0; i-=i&-i)
//		res+=cnt[i].query(b,cnt[i].rt);
//	return res;
//}

int main(){
//	freopen("28","r",stdin);
//	fastio; cin>>len>>num_q;
	scanf("%d %d",&len,&num_q);
	for(int i=1; i<=len; i++){
		char c; scanf(" %c",&c); // cin>>c;
		arr[i] = c-'0';
	}
//	for(int i=1; i<=len+1; i++){
//		rt[i] = ++cnt;
//		seg[cnt] = {0,0,0,0};
////		bit[i].rt = new node(1,len+1);
////		cnt[i].rt = new node(1,len+1,0,0);
////		bit[i].build(1,len+1,1);
////		cnt[i].build(1,len+1,1);
//	}
	zeros.insert(0); zeros.insert(len+1);
//	cupdate(1,len+1,1,len+1,1);
	bupdate(1,len+1,1,len+1,0,1);
	int lst = 0;
	for(int a=1; a<=len; a++){
		if(arr[a] == 0){
			zeros.insert(a);
			int l = lst;
			int r = len+1;
//			update(bit,l+1,a,a+1,r-1,i);
//			cupdate(l+1,a,a+1,r,-1);
			bupdate(l+1,a,a+1,r,0,-1);
			lst = a;
//			printf("R1: %d   R2: %d    C1: %d    C2: %d    V: %d\n",l+1,a,a+1,r,-1);
		}
	}
	for(int i=1; i<=num_q; i++){
		char op[10]; int a; scanf(" %s %d",op,&a);
//		string op; int a; cin>>op>>a;
		if(op[0] == 't'){
			int l = *(--zeros.lower_bound(a));
			int r = *zeros.upper_bound(a);
			if(arr[a] == 0){
				bupdate(l+1,a,a+1,r,-i,1);
//				bupdate(l+1,a,a+1,r,1,1);
				zeros.erase(a);
				//(previous value)+(t-i)
				//(previous value)+t-i
			}else{
				bupdate(l+1,a,a+1,r,i,-1);
//				bupdate(l+1,a,a+1,r,-1,1);
				zeros.insert(a);
				//(previous value)-(t-i)
				//(previous value)-t+i
			}
			arr[a] = !arr[a];
		}else{
			int b; scanf(" %d",&b); //cin>>b;
			pll t = bquery(a,b);
			ll f = t.second*i;
			ll s = t.first;
//			if(f+s < 0) assert(false);
//			cout<<f+s<<endl;
			printf("%lld\n",f+s);
		}
	}
//	cout<<"lol"<<endl;
}
/*
5 1
11111
query 1 2
ans=1

5 4
00001
toggle 3
toggle 2
toggle 4
query 2 6
ans=1
 */

Compilation message

street_lamps.cpp: In function 'int main()':
street_lamps.cpp:201:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&len,&num_q);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:203:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   char c; scanf(" %c",&c); // cin>>c;
           ~~~~~^~~~~~~~~~
street_lamps.cpp:231:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   char op[10]; int a; scanf(" %s %d",op,&a);
                       ~~~~~^~~~~~~~~~~~~~~~
street_lamps.cpp:251:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    int b; scanf(" %d",&b); //cin>>b;
           ~~~~~^~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 271 ms 4552 KB Output is correct
2 Correct 362 ms 4988 KB Output is correct
3 Correct 729 ms 8692 KB Output is correct
4 Correct 2965 ms 173028 KB Output is correct
5 Correct 2584 ms 141420 KB Output is correct
6 Correct 3193 ms 177628 KB Output is correct
7 Correct 2082 ms 205652 KB Output is correct
8 Correct 184 ms 9464 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 6 ms 760 KB Output is correct
2 Correct 5 ms 760 KB Output is correct
3 Correct 4 ms 632 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 4967 ms 228940 KB Output is correct
6 Correct 3566 ms 191676 KB Output is correct
7 Correct 2240 ms 140952 KB Output is correct
8 Correct 184 ms 9568 KB Output is correct
9 Correct 109 ms 4112 KB Output is correct
10 Correct 120 ms 4368 KB Output is correct
11 Correct 119 ms 4572 KB Output is correct
12 Correct 1286 ms 205748 KB Output is correct
13 Correct 184 ms 9508 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 3 ms 632 KB Output is correct
2 Correct 4 ms 636 KB Output is correct
3 Correct 4 ms 760 KB Output is correct
4 Correct 5 ms 760 KB Output is correct
5 Correct 854 ms 141292 KB Output is correct
6 Correct 1867 ms 162416 KB Output is correct
7 Correct 2913 ms 177208 KB Output is correct
8 Correct 4276 ms 190476 KB Output is correct
9 Correct 431 ms 4216 KB Output is correct
10 Correct 353 ms 3448 KB Output is correct
11 Correct 426 ms 4088 KB Output is correct
12 Correct 345 ms 3448 KB Output is correct
13 Correct 425 ms 4088 KB Output is correct
14 Correct 346 ms 3364 KB Output is correct
15 Correct 1296 ms 205720 KB Output is correct
16 Correct 183 ms 9488 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 2 ms 380 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 271 ms 4552 KB Output is correct
9 Correct 362 ms 4988 KB Output is correct
10 Correct 729 ms 8692 KB Output is correct
11 Correct 2965 ms 173028 KB Output is correct
12 Correct 2584 ms 141420 KB Output is correct
13 Correct 3193 ms 177628 KB Output is correct
14 Correct 2082 ms 205652 KB Output is correct
15 Correct 184 ms 9464 KB Output is correct
16 Correct 6 ms 760 KB Output is correct
17 Correct 5 ms 760 KB Output is correct
18 Correct 4 ms 632 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 4967 ms 228940 KB Output is correct
21 Correct 3566 ms 191676 KB Output is correct
22 Correct 2240 ms 140952 KB Output is correct
23 Correct 184 ms 9568 KB Output is correct
24 Correct 109 ms 4112 KB Output is correct
25 Correct 120 ms 4368 KB Output is correct
26 Correct 119 ms 4572 KB Output is correct
27 Correct 1286 ms 205748 KB Output is correct
28 Correct 184 ms 9508 KB Output is correct
29 Correct 3 ms 632 KB Output is correct
30 Correct 4 ms 636 KB Output is correct
31 Correct 4 ms 760 KB Output is correct
32 Correct 5 ms 760 KB Output is correct
33 Correct 854 ms 141292 KB Output is correct
34 Correct 1867 ms 162416 KB Output is correct
35 Correct 2913 ms 177208 KB Output is correct
36 Correct 4276 ms 190476 KB Output is correct
37 Correct 431 ms 4216 KB Output is correct
38 Correct 353 ms 3448 KB Output is correct
39 Correct 426 ms 4088 KB Output is correct
40 Correct 345 ms 3448 KB Output is correct
41 Correct 425 ms 4088 KB Output is correct
42 Correct 346 ms 3364 KB Output is correct
43 Correct 1296 ms 205720 KB Output is correct
44 Correct 183 ms 9488 KB Output is correct
45 Correct 104 ms 2808 KB Output is correct
46 Correct 174 ms 2808 KB Output is correct
47 Correct 1337 ms 60700 KB Output is correct
48 Correct 2559 ms 172972 KB Output is correct
49 Correct 130 ms 4584 KB Output is correct
50 Correct 131 ms 4416 KB Output is correct
51 Correct 130 ms 4600 KB Output is correct
52 Correct 136 ms 4984 KB Output is correct
53 Correct 136 ms 5132 KB Output is correct
54 Correct 133 ms 5004 KB Output is correct