제출 #222545

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
222545		Fshoaib	Collecting Stamps 3 (JOI20_ho_t3)	C++11	0 / 100	5 ms	384 KiB

ho_t3

#include "bits/stdc++.h"
using namespace std;
/*ios_base::sync_with_stdio(false);
    cin.tie(NULL);*/
    
typedef long long ll;
struct node {
    int s, e;
    ll mn, mx, sum;
    bool lset;
    ll add_val, set_val;
    node *l, *r;
    node (int _s, int _e, int A[] = NULL): s(_s), e(_e), mn(0), mx(0), sum(0), lset(0), add_val(0), set_val(0), l(NULL), r(NULL) {
        if (A == NULL) return;
        if (s == e) mn = mx = sum = A[s];
        else {
            l = new node(s, (s+e)>>1, A), r = new node((s+e+2)>>1, e, A);
            combine();
        }
    }
    void create_children() {
        if (s == e) return;
        if (l != NULL) return;
        int m = (s+e)>>1;
        l = new node(s, m);
        r = new node(m+1, e);
    }
    void self_set(ll v) {
        lset = 1;
        mn = mx = set_val = v;
        sum = v * (e-s+1);
        add_val = 0;
    }
    void self_add(ll v) {
        if (lset) { self_set(v + set_val); return; }
        mn += v, mx += v, add_val += v;
        sum += v*(e-s+1);
    }
    void lazy_propagate() {
        if (s == e) return;
        if (lset) {
            l->self_set(set_val), r->self_set(set_val);
            lset = set_val = 0;
        }   
        if (add_val != 0) {
            l->self_add(add_val), r->self_add(add_val);
            add_val = 0;
        }
    }
    void combine() {
        if (l == NULL) return;
        sum = l->sum + r->sum;
        mn = min(l->mn, r->mn);
        mx = max(l->mx, r->mx);
    }
    void add(int x, int y, ll v) {
        if (s == x && e == y) { self_add(v); return; }
        int m = (s+e)>>1;
        create_children(); lazy_propagate();
        if (x <= m) l->add(x, min(y, m), v);
        if (y > m) r->add(max(x, m+1), y, v);
        combine();
    }
    void set(int x, int y, ll v) {
        if (s == x && e == y) { self_set(v); return; }
        int m = (s+e)>>1;
        create_children(); lazy_propagate();
        if (x <= m) l->set(x, min(y, m), v);
        if (y > m) r->set(max(x, m+1), y, v);
        combine();
    }
    ll range_sum(int x, int y) {
        if (s == x && e == y) return sum;
        if (l == NULL || lset) return (sum / (e-s+1)) * (y-x+1);
        int m = (s+e)>>1;
        lazy_propagate();
        if (y <= m) return l->range_sum(x, y);
        if (x > m) return r->range_sum(x, y);
        return l->range_sum(x, m) + r->range_sum(m+1, y);
    }
    ll range_min(int x, int y) {
        if (s == x && e == y) return mn;
        if (l == NULL || lset) return mn;
        int m = (s+e)>>1;
        lazy_propagate();
        if (y <= m) return l->range_min(x, y);
        if (x > m) return r->range_min(x, y);
        return min(l->range_min(x, m), r->range_min(m+1, y));
    }
    ll range_max(int x, int y) {
        if (s == x && e == y) return mx;
        if (l == NULL || lset) return mx;
        int m = (s+e)>>1;
        lazy_propagate();
        if (y <= m) return l->range_max(x, y);
        if (x > m) return r->range_max(x, y);
        return max(l->range_max(x, m), r->range_max(m+1, y));
    }
    ~node() {
        if (l != NULL) delete l;
        if (r != NULL) delete r;
    }
} *root;
 
 int sta = 0; 
 ll N, L; 
 ll h = -1; 
pair<ll,ll> stamps[205];
ll s; 
 void search(set<ll> vis, ll idx, ll prev, ll time){
	  
	 if (stamps[idx].first == -1){
	 } else if (vis.size() == N){
		 sta = N; 
		 for(int i =0; i < 205; i++){
			stamps[i] = make_pair(-1,-1); 
		 } 
	 } else if (time > h) {
	 } else { //edge cases 
		 ll beg = vis.size();
		 if (time <= stamps[idx].second){
			 vis.insert(idx); 
		 } 
		 
		 if (vis.size() > sta){
			 sta = vis.size(); 
		 }
		 
		 ll bak = idx - 1; 
		 ll db = stamps[idx].first - stamps[bak].first; 
		 if (bak < 0){
			 bak = s - 1; 
			 db = L - stamps[bak].first + stamps[idx].first; 
		 } 
		 
		 ll fron = idx + 1; 
		 ll df = stamps[fron].first - stamps[idx].first; 
		 if (fron >= s){
			 fron = 0; 
			 df = L - stamps[idx].first + stamps[fron].first; 
		 }
		 if (beg == vis.size()){
			 if (prev != bak){
				 search(vis, bak, idx, db + time); 
			 }
			 if (prev != fron){
				 search(vis, fron, idx, df + time); 
			 }
		 } else {
			 search(vis, bak, idx, db + time); 
			 search(vis, fron, idx, df + time); 
		 }
	 }
	 
	 
	 
	 
 }
 
int main( )
{	ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    for(int i =0; i < 205; i++){
		stamps[i] = make_pair(-1,-1); 
	}
	
	cin >> N >> L; 
	ll p[N];
	ll t[N]; 
	for(int i=0; i < N; i++){
		cin >> p[i]; 
	}
	for(int i=0; i < N; i++){
		cin >> t[i]; 
		h = max(t[i],h); 
	}
	s = 0; 
	priority_queue<pair<ll,ll> > st; 
	for(int i=0; i < N; i++){
		if (min(L - p[i], p[i]) <= t[i]){
			st.push(make_pair(-p[i],-t[i])); 
			s++; 
		}
	}
	for(int i=0; i < s; i++){
		stamps[i] = make_pair(-st.top().first, -st.top().second); 
		st.pop(); 
	}
	
	
	set<ll> ini; 
	if (s > 0) {
		search(ini, 0, -1, min(L - p[0], p[0])); 
		
	}
	if (s > 1){
		search(ini, s-1, -1, min(L - p[s-1], p[s-1])); 
	}
	
	cout << sta; 
	
   
}

컴파일 시 표준 에러 (stderr) 메시지

ho_t3.cpp: In member function 'void node::lazy_propagate()':
ho_t3.cpp:43:28: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
             lset = set_val = 0;
                    ~~~~~~~~^~~
ho_t3.cpp: In function 'void search(std::set<long long int>, ll, ll, ll)':
ho_t3.cpp:113:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   } else if (vis.size() == N){
              ~~~~~~~~~~~^~~~
ho_t3.cpp:125:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (vis.size() > sta){
        ~~~~~~~~~~~^~~~~
ho_t3.cpp:142:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (beg == vis.size()){
        ~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75