Submission #1177201

#	Time	Username	Problem	Language	Result	Execution time	Memory
1177201		nguyn	Stone Arranging 2 (JOI23_ho_t1)	C++20	100 / 100	95 ms	13384 KiB

Main

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

#define ll long long 
#define F first
#define S second
#define pb push_back 
#define pii pair<int,int>

const int N = 2e5 + 5;

int n; 
int a[N]; 
map<int, int> pos;
int nxt[N];

signed main(){
    ios_base::sync_with_stdio(false) ; 
    cin.tie(0) ; cout.tie(0) ; 
    if (fopen("INP.INP" ,"r")) {
        freopen("INP.INP" ,"r" , stdin) ;
        freopen("OUT.OUT" , "w" , stdout) ;
    }
    cin >> n;
    for (int i = 1; i <= n; i++) {
    	cin >> a[i]; 
    }
    for (int i = n; i >= 1; i--) {
    	if (!pos.count(a[i])) {
    		nxt[i] = i;
    		pos[a[i]] = i;
    	}
    	else {
    		nxt[i] = pos[a[i]]; 
    		pos[a[i]] = i;
    	}
    }
    int npos = 0;
    int cur = a[1];
    for (int i = 1; i <= n; i++) {
    	if (i > npos) {
    		cout << a[i];
    		cur = a[i];
    		npos = nxt[i]; 
    	}
    	else {
    		if (cur == a[i]) {
    			npos = nxt[i];
    		}
    		cout << cur; 
    	}
    	cout << '\n';
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen("INP.INP" ,"r" , stdin) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen("OUT.OUT" , "w" , stdout) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40