Submission #891789

#	Time	Username	Problem	Language	Result	Execution time	Memory
891789		LCJLY	Group Photo (JOI21_ho_t3)	C++14	0 / 100	0 ms	348 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl; 
#define show4(x,y) for(auto it:x) cout << it << " "; cout << #y << endl;
typedef pair<int,int>pii;
typedef pair<pii,pii>pi2;

void solve(){
	int n;
	cin >> n;
	int arr[n];
	for(int x=0;x<n;x++){
		cin >> arr[x];
	}
	
	int last[n+5];
	memset(last,-1,sizeof(last));
	int add[n+5];
	memset(add,0,sizeof(add));
	
	int counter=0;
	for(int x=0;x<n;x++){
		int index=arr[x];
		if(last[index+1]==-1){
			last[index]=x;
			continue;
		}
		int prev=last[index+1];
		//show2(prev,prev,x,x);
		int hold=x-prev+add[prev]-1;
		for(int y=x-1;y>=prev;y--){
			add[y]--;
		}
		counter+=hold;
		last[index]=last[index+1];
	}
	cout << counter;
}

int32_t main(){										
	ios::sync_with_stdio(0);	
	cin.tie(0);
	//freopen("in.txt", "r", stdin);
	int t=1;
	//cin >> t;
	while(t--){
		solve();
	}	
}



		


		
		
	

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 32
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36