Submission #1279413

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279413		muhammad-mutahir	Airplane (NOI23_airplane)	C++20	0 / 100	141 ms	6092 KiB

Main

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

#define print(l) for(auto i:l) cout<<i<<" ";cout<<endl;
#define input(t,l,n) vector<t>l(n);for(int i = 0;i<n;i++)cin>>l[i];
#define int long long
#define pb push_back
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> 
#define all(l) l.begin(),l.end()
#define pii pair<int,int>
#define fi first
#define se second

const int M = 1e9+7;
const int inf = 1e18;
void io(){
    #ifndef ONLINE_JUDGE
    freopen("input.in","r",stdin);
    // freopen("outputf.in","w",stdout*);
    #endif

    ios::sync_with_stdio(0);//DO NOT USE IN INTERACTIVE
    cin.tie(0), cout.tie(0);
    cout << fixed<<setprecision(9);

}

int bp(int x, int y, int p){
    int res = 1;
    x = x % p;
    while (y > 0) {
 
        if (y & 1)
            res = (res * x) % p;
        y = y >> 1;
        x = (x * x) % p;
    }
    return res;
}
 
int MI(int n, int p){
    return bp(n, p - 2, p);
}
int mul(int x,int y, int p){
    return x * 1ull * y % p;
}
int di(int x,int y, int p){
    return mul(x, MI(y, p), p);
}


int n , m , k , q;

void yn(int t){
	if(t){
		cout<<"YES"<<endl;
	}
	else{
		cout<<"NO"<<endl;
	}
}

void solve(int testcase_number){
	cin>>n>>m;
	if(n == 1){
		cout<<0<<endl;
		return;
	}
	input(int,l,n);
	vector<int>vis(n,0);
	for(int i = 0;i<m;i++){
		cin>>q>>q;
	}
	int mx = 0;
	for(int i:l){
		mx = max(mx,i);
	}
	int li = 0;
	int r = 0;
	for(int i = 1;i<n;i++){
		if(l[i]<l[i-1]){
			if(l[i-1] == mx){
				break;
			}
			l[i] = l[i-1];
		}
		vis[i-1] = 1;
	}
	reverse(all(l));
	reverse(all(vis));
	for(int i = 1;i<n;i++){
		if(l[i]<l[i-1]){
			if(l[i-1] == mx){
				break;
			}
			l[i] = l[i-1];
		}
		vis[i-1] = 1;
	
	}

	reverse(all(l));
	reverse(all(vis));
	int ans = -1;
	for(int i = 0;i<n;i++){
		if(vis[i] == 0){
			l[i] = mx;
			ans++;
		}
	}
	vector<int>v1,v2;
	int  f = 0;
	for(int i = 0;i<n;i++){
		if(f == 0 and !vis[i]){
			v1.pb(l[i]);
		}
		if(f and i-1>=0 and !vis[i-1] and vis[i]){
			v2.pb(l[i-1]);
		}
		if(vis[i] == 0){
			f = 1;
		}
		if(!f and vis[i]){
			v1.pb(l[i]);
		}
		else if(f and vis[i]){
			v2.pb(l[i]);
		}
	}
	// print(l);
	// pritn(vis);
	reverse(all(v1));
	// print(v1);
	// print(v2);
	int al = v1[0];

	for(int i = 1;i<v1.size();i++){
		if(v1[i] == al){
			ans++;
		}
		else{
			ans++;
			al--;
		}

	}
	ans+=al;
	al = v2[0];

	for(int i = 1;i<v2.size();i++){
		if(v2[i] == al){
			ans++;
		}
		else{
			ans++;
			al--;
		}

	}
	ans+=al;
	cout<<ans<<endl;
}


signed main(){
    // io();
    int t = 1;
    // cin>>t;
    for(int i = 1;i<=t;i++){
        solve(i);
    }

}

Compilation message (stderr)

Main.cpp: In function 'void io()':
Main.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen("input.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 10
• Subtask 3: 0 / 31
• Subtask 4: 0 / 37