제출 #404097

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
404097		errorgorn	조개 줍기 (KOI17_shell)	C++17	34 / 100	696 ms	222276 KiB

shell

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

struct node{
	int s,e,m;
	int val=0;
	node *l,*r;
	
	node (int _s,int _e){
		s=_s,e=_e,m=s+e>>1;
		if (s!=e){
			l=new node(s,m);
			r=new node(m+1,e);
		}
	}
	
	void update(int i,int j,int k){
		if (s==i && e==j) val+=k;
		else if (j<=m) l->update(i,j,k);
		else if (m<i) r->update(i,j,k);
		else l->update(i,m,k),r->update(m+1,j,k);
	}
	
	int query(int i){
		if (s==e) return val;
		else if (i<=m) return val+l->query(i);
		else return val+r->query(i);
	}
} *root[1505];

int n;
int arr[1505][1505];

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n;
	rep(x,1,n+1) rep(y,1,n+1) cin>>arr[x][y];
	
	rep(x,0,1505) root[x]=new node(0,1505);
	
	ll ans=0;
	rep(x,1,n+1) rep(y,1,n+1){
		int temp=max(root[x]->query(y-1),root[x-1]->query(y))+arr[x][y];
		root[x]->update(y,y,temp);
		ans+=temp;
	}
	
	cout<<ans<<endl;
	
	char c;
	int a,b;
	
	rep(x,0,n){
		cin>>c>>a>>b;
		
		if (c=='U'){
			arr[a][b]++;
			
			int l=b,r=b;
			rep(y,a,n+1){
				while (l<=r && root[y]->query(l)==
					max(root[y-1]->query(l),root[y]->query(l-1))+arr[y][l]){
						
					l++;
				}
				if (r<l) break;
				while (r!=n && root[y]->query(r)+arr[y][r+1]==root[y]->query(b+1)){
					r++;
				}
				
				
				root[y]->update(l,r,1);
				ans+=(r-l+1);
			}
		}
		else{
			arr[a][b]--;
			
			int l=b,r=b;
			rep(y,a,n+1){
				while (r!=n && root[y-1]->query(r+1)+arr[y][r+1]!=root[y]->query(r+1)){
					r++;
				}
				while (l<=r && root[y]->query(l)==
					max(root[y-1]->query(l),root[y]->query(l-1))+arr[y][l]){
						
					l++;
				}
				
				if (r<l) break;
				root[y]->update(l,r,-1);
				ans-=(r-l+1);
			}
		}
		
		cout<<ans<<endl;
	}
}

컴파일 시 표준 에러 (stderr) 메시지

shell.cpp: In constructor 'node::node(int, int)':
shell.cpp:41:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   41 |   s=_s,e=_e,m=s+e>>1;
      |               ~^~

• Subtask 1: 0 / 12
• Subtask 2: 34 / 34
• Subtask 3: 0 / 54