Submission #1273790

#	Time	Username	Problem	Language	Result	Execution time	Memory
1273790		nthvn	Just Long Neckties (JOI20_ho_t1)	C++20	100 / 100	66 ms	8664 KiB

ho_t1

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

#define LOG(n) (63 - __builtin_clzll((n)))
#define fi first
#define se second
#define pii pair<int,int> 
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define pb push_back
#define ll long long
const int N = 2e5+5;
int n,a[N],b[N],pos[N];
int pre[N], suf[N], fans[N];

void precalc(){
	static pii v[N];
	for(int i=1;i<=n+1;i++) v[i] = {a[i], i};
	sort(v+1,v+n+2);
	for(int i=1;i<=n+1;i++){
		pos[i] = v[i].se;
		a[i] = v[i].fi;
	}
	sort(b+1,b+n+1);
}

signed main(){
	ios_base::sync_with_stdio(NULL);
	cin.tie(NULL);
	if(fopen("TASK.INP", "r")){
		freopen("TASK.INP", "r", stdin);
		freopen("TASK.OUT", "w", stdout);
	}
	cin>>n;
	for(int i=1;i<=n+1;i++) cin>>a[i];
	for(int i=1;i<=n;i++) cin>>b[i];
	precalc();
	for(int i=1;i<=n;i++){
		pre[i] = max(pre[i-1], a[i]-b[i]);
	}
	for(int i=n+1;i>=2;i--){
		suf[i] = max(suf[i+1], a[i]-b[i-1]);
	}
	
	for(int i=1;i<=n+1;i++){
		fans[pos[i]] = max(pre[i-1], suf[i+1]);
	}
	for(int i=1;i<=n+1;i++) cout<<fans[i]<<" ";
	
	
}

Compilation message (stderr)

ho_t1.cpp: In function 'int main()':
ho_t1.cpp:31:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |                 freopen("TASK.INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
ho_t1.cpp:32:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |                 freopen("TASK.OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 8 / 8
• Subtask 3: 91 / 91