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답안 #851680

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
851680 2023-09-20T11:21:45 Z MilosMilutinovic Fish 2 (JOI22_fish2) C++14
31 / 100
 1065 ms 54236 KB 
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef basic_string<int> B;
typedef long long ll;
typedef pair<int,int> PII;
typedef double db;
mt19937 mrand(random_device{}()); 
const ll mod=1000000007;
int rnd(int x) { return mrand() % x;}
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
ll gcd(ll a,ll b) { return b?gcd(b,a%b):a;}
// head

const int N=100100;
const int M=8*N;
const int inf=(int)1e9;
int n,q,a[N];

namespace sum {
	ll c[N];
	void modify(int p,int v) {
		for (;p<N;p+=p&-p) c[p]+=v;
	}
	ll get(int p) {
		ll r=0;
		for (;p>0;p-=p&-p) r+=c[p];
		return r;
	}
	ll get(int l,int r) {
		if (l>r) {
			return 0ll;
		}
		return get(r)-get(l-1);
	}
};

namespace segs {
	vector<PII> st[M];
	void add(int x,int l,int r,int ql,int qr,PII p) {
		if (l>r||l>qr||r<ql) {
			return;
		}
		if (ql<=l&&r<=qr) {
			st[x].pb(p);
			return;
		}
		int mid=l+r>>1;
		add(x*2,l,mid,ql,qr,p);
		add(x*2+1,mid+1,r,ql,qr,p);
	}
};

namespace cnt {
	PII st[M];
	int lzy[M];
	void push(int x) {
		st[x*2].fi+=lzy[x];
		st[x*2+1].fi+=lzy[x];
		lzy[x*2]+=lzy[x];
		lzy[x*2+1]+=lzy[x];
		lzy[x]=0;
	}
	PII mrg(PII a,PII b) {
		PII r;
		r.fi=min(a.fi,b.fi);
		r.se=(a.fi==r.fi?a.se:0)+(b.fi==r.fi?b.se:0);
		return r;
	}
	void pull(int x) {
		st[x]=mrg(st[x*2],st[x*2+1]);
	}
	void build(int x,int l,int r) {
		if (l==r) {
			st[x].fi=0;
			st[x].se=1;
			return;
		}
		int mid=l+r>>1;
		build(x*2,l,mid);
		build(x*2+1,mid+1,r);
		pull(x);
	}
	void add(int x,int l,int r,int ql,int qr,int v) {
		if (l>r||l>qr||r<ql||ql>qr) {
			return;
		}
		if (ql<=l&&r<=qr) {
			st[x].fi+=v;
			lzy[x]+=v;
			push(x);
			return;
		}
		push(x);
		int mid=l+r>>1;
		add(x*2,l,mid,ql,qr,v);
		add(x*2+1,mid+1,r,ql,qr,v);
		pull(x);
	}
	PII query(int x,int l,int r,int ql,int qr) {
		if (l>r||l>qr||r<ql) {
			return mp(inf,0);
		}
		if (ql<=l&&r<=qr) {
			return st[x];
		}
		push(x);
		int mid=l+r>>1;
		auto qvl=query(x*2,l,mid,ql,qr);
		auto qvr=query(x*2+1,mid+1,r,ql,qr);
		pull(x);
		return mrg(qvl,qvr);
	}
	int sol(int l,int r) {
		auto p=query(1,1,n,l,r);
		return p.se;
	}
};

namespace pref {
	struct node {
		ll vl,vr;
		node(ll _vl=0,ll _vr=0) : vl(_vl),vr(_vr) {}
	};
	node st[M];
	node mrg(node a,node b) {
		node r;
		r.vl=max(a.vl,b.vl);
		r.vr=max(a.vr,b.vr);
		return r;
	}
	void pull(int x) {
		st[x]=mrg(st[x*2],st[x*2+1]);
	}
	void modify(int x,int l,int r,int p) {
		if (l==r) {
			st[x].vl=a[p]-sum::get(1,p-1);
			st[x].vr=a[p]-sum::get(p+1,N-1);
			return;
		}
		int mid=l+r>>1;
		if (p<=mid) {
			modify(x*2,l,mid,p);
		} else {
			modify(x*2+1,mid+1,r,p);
		}
		pull(x);
	}
	node query(int x,int l,int r,int ql,int qr) {
		if (l>r||l>qr||r<ql||ql>qr) {
			return node(-inf*1ll*inf,-inf*1ll*inf);
		}
		if (ql<=l&&r<=qr) {
			return st[x];
		}
		int mid=l+r>>1;
		return mrg(query(x*2,l,mid,ql,qr),query(x*2+1,mid+1,r,ql,qr));
	}
};

void build() {
	cnt::build(1,1,n);
	rep(i,1,n+1) {
		sum::modify(i,a[i]);
	}
	rep(i,1,n+1) {
		pref::modify(1,1,n,i);
	}
	stack<int> stk;
	rep(i,1,n+1) {
		while (SZ(stk)>0&&a[i]>a[stk.top()]) {
			int L=stk.top();
			int R=i;
			if (L!=R-1&&min(a[L],a[R])>sum::get(L+1,R-1)) {
				segs::add(1,1,n,L,R,mp(L,R));
				cnt::add(1,1,n,L+1,R-1,1);
			}
			stk.pop();
		}
		stk.push(i);
	}
	while (SZ(stk)) stk.pop();
	rep(i,1,n+1) {
		while (SZ(stk)>0&&a[i]>=a[stk.top()]) {
			int L=stk.top();
			int R=i;
			if (L!=R-1&&min(a[L],a[R])>sum::get(L+1,R-1)) {
				segs::add(1,1,n,L,R,mp(L,R));
				cnt::add(1,1,n,L+1,R-1,1);
			}
			stk.pop();
		}
		stk.push(i);
	}
	while (SZ(stk)) stk.pop();
	per(i,1,n+1) {
		while (SZ(stk)>0&&a[i]>a[stk.top()]) {
			int L=i;
			int R=stk.top();
			if (L!=R-1&&min(a[L],a[R])>sum::get(L+1,R-1)) {
				segs::add(1,1,n,L,R,mp(L,R));
				cnt::add(1,1,n,L+1,R-1,1);
			}
			stk.pop();
		}
		stk.push(i);
	}
	per(i,1,n+1) {
		while (SZ(stk)>0&&a[i]>=a[stk.top()]) {
			int L=i;
			int R=stk.top();
			if (L!=R-1&&min(a[L],a[R])>sum::get(L+1,R-1)) {
				segs::add(1,1,n,L,R,mp(L,R));
				cnt::add(1,1,n,L+1,R-1,1);
			}
			stk.pop();
		}
		stk.push(i);
	}
}

int main() {
	scanf("%d",&n);
	rep(i,1,n+1) {
		scanf("%d",&a[i]);
	}
	build();
	scanf("%d",&q);
	while (q--) {
		int op;
		scanf("%d",&op);
		if (op==1) {

		} else {
			int l,r;
			scanf("%d%d",&l,&r);
			{
				int low=l,high=r,pos=l;
				while (low<=high) {
					int mid=low+high>>1;
					if (pref::query(1,1,n,mid,r).vl+sum::get(1,l-1)>0) {
						pos=mid;
						low=mid+1;
					} else {
						high=mid-1;
					}
				}
				l=pos;
			}
			{
				int low=l,high=r,pos=r;
				while (low<=high) {
					int mid=low+high>>1;
					if (pref::query(1,1,n,l,mid).vr+sum::get(r+1,n)>0) {
						pos=mid;
						high=mid-1;
					} else {
						low=mid+1;
					}
				}
				r=pos;
			}
			//printf("%d %d\n",l,r);
			printf("%d\n",cnt::sol(l,r));
		}
	}
}

Compilation message

fish2.cpp: In function 'void segs::add(int, int, int, int, int, PII)':
fish2.cpp:57:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   57 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'void cnt::build(int, int, int)':
fish2.cpp:88:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   88 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'void cnt::add(int, int, int, int, int, int)':
fish2.cpp:104:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  104 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'PII cnt::query(int, int, int, int, int)':
fish2.cpp:117:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  117 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'void pref::modify(int, int, int, int)':
fish2.cpp:150:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  150 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'pref::node pref::query(int, int, int, int, int)':
fish2.cpp:165:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  165 |   int mid=l+r>>1;
      |           ~^~
fish2.cpp: In function 'int main()':
fish2.cpp:249:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  249 |      int mid=low+high>>1;
      |              ~~~^~~~~
fish2.cpp:262:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  262 |      int mid=low+high>>1;
      |              ~~~^~~~~
fish2.cpp:232:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  232 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
fish2.cpp:234:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  234 |   scanf("%d",&a[i]);
      |   ~~~~~^~~~~~~~~~~~
fish2.cpp:237:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  237 |  scanf("%d",&q);
      |  ~~~~~^~~~~~~~~
fish2.cpp:240:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  240 |   scanf("%d",&op);
      |   ~~~~~^~~~~~~~~~
fish2.cpp:245:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  245 |    scanf("%d%d",&l,&r);
      |    ~~~~~^~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 37464 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 37464 KB Output is correct
2 Correct 118 ms 50944 KB Output is correct
3 Correct 111 ms 49488 KB Output is correct
4 Correct 121 ms 51100 KB Output is correct
5 Correct 115 ms 49808 KB Output is correct
6 Correct 76 ms 44880 KB Output is correct
7 Correct 61 ms 44116 KB Output is correct
8 Correct 82 ms 44880 KB Output is correct
9 Correct 67 ms 44372 KB Output is correct
10 Correct 80 ms 47176 KB Output is correct
11 Correct 76 ms 46416 KB Output is correct
12 Correct 71 ms 44628 KB Output is correct
13 Correct 69 ms 44624 KB Output is correct
14 Correct 90 ms 46672 KB Output is correct
15 Correct 102 ms 46768 KB Output is correct

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 37464 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 37464 KB Output is correct
2 Correct 118 ms 50944 KB Output is correct
3 Correct 111 ms 49488 KB Output is correct
4 Correct 121 ms 51100 KB Output is correct
5 Correct 115 ms 49808 KB Output is correct
6 Correct 76 ms 44880 KB Output is correct
7 Correct 61 ms 44116 KB Output is correct
8 Correct 82 ms 44880 KB Output is correct
9 Correct 67 ms 44372 KB Output is correct
10 Correct 80 ms 47176 KB Output is correct
11 Correct 76 ms 46416 KB Output is correct
12 Correct 71 ms 44628 KB Output is correct
13 Correct 69 ms 44624 KB Output is correct
14 Correct 90 ms 46672 KB Output is correct
15 Correct 102 ms 46768 KB Output is correct
16 Correct 8 ms 37464 KB Output is correct
17 Correct 966 ms 50272 KB Output is correct
18 Correct 968 ms 54096 KB Output is correct
19 Correct 959 ms 51988 KB Output is correct
20 Correct 956 ms 52284 KB Output is correct
21 Correct 958 ms 51800 KB Output is correct
22 Correct 985 ms 54236 KB Output is correct
23 Correct 959 ms 51788 KB Output is correct
24 Correct 989 ms 52356 KB Output is correct
25 Correct 967 ms 52048 KB Output is correct
26 Correct 964 ms 52632 KB Output is correct
27 Correct 937 ms 47840 KB Output is correct
28 Correct 924 ms 47840 KB Output is correct
29 Correct 891 ms 47928 KB Output is correct
30 Correct 790 ms 46244 KB Output is correct
31 Correct 762 ms 45812 KB Output is correct
32 Correct 966 ms 48464 KB Output is correct
33 Correct 982 ms 49548 KB Output is correct
34 Correct 933 ms 48124 KB Output is correct
35 Correct 897 ms 47400 KB Output is correct
36 Correct 937 ms 50324 KB Output is correct
37 Correct 912 ms 46752 KB Output is correct
38 Correct 828 ms 46880 KB Output is correct
39 Correct 921 ms 49100 KB Output is correct
40 Correct 1065 ms 49068 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 37464 KB Output is correct
2 Correct 118 ms 50944 KB Output is correct
3 Correct 111 ms 49488 KB Output is correct
4 Correct 121 ms 51100 KB Output is correct
5 Correct 115 ms 49808 KB Output is correct
6 Correct 76 ms 44880 KB Output is correct
7 Correct 61 ms 44116 KB Output is correct
8 Correct 82 ms 44880 KB Output is correct
9 Correct 67 ms 44372 KB Output is correct
10 Correct 80 ms 47176 KB Output is correct
11 Correct 76 ms 46416 KB Output is correct
12 Correct 71 ms 44628 KB Output is correct
13 Correct 69 ms 44624 KB Output is correct
14 Correct 90 ms 46672 KB Output is correct
15 Correct 102 ms 46768 KB Output is correct
16 Incorrect 7 ms 37464 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 37464 KB Output isn't correct
2 Halted 0 ms 0 KB -