oj.uz

Submission #888861

# Submission time Handle Problem Language Result Execution time Memory
888861 2023-12-18T09:45:40 Z vjudge1 Passport (JOI23_passport) C++17
22 / 100
 50 ms 56984 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
#define pii pair<int,int>
using namespace __gnu_pbds;
using namespace std;
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
#define f first
#define s second
#define pii pair<int,int>
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
	tree_order_statistics_node_update> ordered_set;
const int mod= 1e9 +7;
const int N=2505;

int binpow (int a, int n) {
	if (n == 0)
		return 1;
	if (n % 2 == 1)
		return binpow (a, n-1) * a;
	else {
		int b = binpow (a, n/2);
		return b * b;
	}
}

vector<vector<int>> dist(N, vector<int> (N, mod));

void solve(){
	int n,m,k;

	cin>>n;
	
	if(n<=300){
	vector<int>l(n+1),r(n+1);
	
	for(int i = 0;i<n;i++){
		int a,b;
		cin>>l[i]>>r[i];
		l[i]--;r[i]--;
	}
	
	int h,x;
	cin>>h>>x;
	x--;
	queue<pii>q;
	q.push({l[x],r[x]});
	dist[l[x]][r[x]] = 1;
	
	while(!q.empty()){
		auto [x,y] = q.front();
		q.pop();
		
		for(int i = x;i<=y;i++){
			int mxl = min(x,l[i]),mxr = max(r[i],y);
			if(umin(dist[mxl][mxr],dist[x][y] + 1)){
				q.push({mxl,mxr});
			}
		}
	}
	
	if(dist[0][n-1]==mod)cout<<-1<<"\n";
	else cout<<dist[0][n-1]<<"\n";
	
		
	}
	else{
		vector<pii>v;vector<int>pref(n+1,0);
	int r1 = 1;
	int cnt = 1;
	for(int i = 0;i<n;i++){
		int l,r;
		cin>>l>>r;
		v.pb({l,r});
		if(i==0)r1 = r;
		if(i==n)cout<<"Baiysh want a rulet!!!!!!!!!!!!!!!!!!!!!!\n";
		else{
			pref[i+1] = max(pref[i],r);
		}
	}
	int last = -1;int ans = 1;
	while(r1!=n){
		last = r1;
		r1 = pref[r1];
		ans++;
		if(last==r1){
			cout<<-1<<"\n";
			exit(0);
		}
	}
	cout<<ans<<"\n";
	}
	






}

 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int cnt=0;
	int tt=1;
	while(tt--)solve();

}

Compilation message

passport.cpp: In function 'void solve()':
passport.cpp:45:7: warning: unused variable 'a' [-Wunused-variable]
   45 |   int a,b;
      |       ^
passport.cpp:45:9: warning: unused variable 'b' [-Wunused-variable]
   45 |   int a,b;
      |         ^
passport.cpp:77:6: warning: unused variable 'cnt' [-Wunused-variable]
   77 |  int cnt = 1;
      |      ^~~
passport.cpp:37:8: warning: unused variable 'm' [-Wunused-variable]
   37 |  int n,m,k;
      |        ^
passport.cpp:37:10: warning: unused variable 'k' [-Wunused-variable]
   37 |  int n,m,k;
      |          ^
passport.cpp: In function 'int main()':
passport.cpp:114:6: warning: unused variable 'cnt' [-Wunused-variable]
  114 |  int cnt=0;
      |      ^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 49500 KB Output is correct
2 Correct 23 ms 49496 KB Output is correct
3 Correct 23 ms 49500 KB Output is correct
4 Correct 49 ms 55756 KB Output is correct
5 Correct 48 ms 56716 KB Output is correct
6 Correct 50 ms 56984 KB Output is correct
7 Correct 45 ms 56780 KB Output is correct
8 Correct 43 ms 56584 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 49500 KB Output is correct
2 Correct 23 ms 49500 KB Output is correct
3 Correct 23 ms 49500 KB Output is correct
4 Correct 23 ms 49588 KB Output is correct
5 Correct 27 ms 49748 KB Output is correct
6 Correct 23 ms 49500 KB Output is correct
7 Correct 23 ms 49424 KB Output is correct
8 Correct 23 ms 49500 KB Output is correct
9 Correct 23 ms 49500 KB Output is correct
10 Correct 24 ms 49604 KB Output is correct
11 Correct 25 ms 49492 KB Output is correct
12 Correct 24 ms 49488 KB Output is correct
13 Correct 24 ms 49468 KB Output is correct
14 Correct 24 ms 49584 KB Output is correct
15 Correct 25 ms 49496 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 49500 KB Output is correct
2 Correct 23 ms 49500 KB Output is correct
3 Correct 23 ms 49500 KB Output is correct
4 Correct 23 ms 49588 KB Output is correct
5 Correct 27 ms 49748 KB Output is correct
6 Correct 23 ms 49500 KB Output is correct
7 Correct 23 ms 49424 KB Output is correct
8 Correct 23 ms 49500 KB Output is correct
9 Correct 23 ms 49500 KB Output is correct
10 Correct 24 ms 49604 KB Output is correct
11 Correct 25 ms 49492 KB Output is correct
12 Correct 24 ms 49488 KB Output is correct
13 Correct 24 ms 49468 KB Output is correct
14 Correct 24 ms 49584 KB Output is correct
15 Correct 25 ms 49496 KB Output is correct
16 Incorrect 24 ms 49756 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 49500 KB Output is correct
2 Correct 23 ms 49500 KB Output is correct
3 Correct 23 ms 49500 KB Output is correct
4 Correct 23 ms 49588 KB Output is correct
5 Correct 27 ms 49748 KB Output is correct
6 Correct 23 ms 49500 KB Output is correct
7 Correct 23 ms 49424 KB Output is correct
8 Correct 23 ms 49500 KB Output is correct
9 Correct 23 ms 49500 KB Output is correct
10 Correct 24 ms 49604 KB Output is correct
11 Correct 25 ms 49492 KB Output is correct
12 Correct 24 ms 49488 KB Output is correct
13 Correct 24 ms 49468 KB Output is correct
14 Correct 24 ms 49584 KB Output is correct
15 Correct 25 ms 49496 KB Output is correct
16 Incorrect 24 ms 49756 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 49500 KB Output is correct
2 Correct 23 ms 49496 KB Output is correct
3 Correct 23 ms 49500 KB Output is correct
4 Correct 49 ms 55756 KB Output is correct
5 Correct 48 ms 56716 KB Output is correct
6 Correct 50 ms 56984 KB Output is correct
7 Correct 45 ms 56780 KB Output is correct
8 Correct 43 ms 56584 KB Output is correct
9 Correct 24 ms 49500 KB Output is correct
10 Correct 23 ms 49500 KB Output is correct
11 Correct 23 ms 49500 KB Output is correct
12 Correct 23 ms 49588 KB Output is correct
13 Correct 27 ms 49748 KB Output is correct
14 Correct 23 ms 49500 KB Output is correct
15 Correct 23 ms 49424 KB Output is correct
16 Correct 23 ms 49500 KB Output is correct
17 Correct 23 ms 49500 KB Output is correct
18 Correct 24 ms 49604 KB Output is correct
19 Correct 25 ms 49492 KB Output is correct
20 Correct 24 ms 49488 KB Output is correct
21 Correct 24 ms 49468 KB Output is correct
22 Correct 24 ms 49584 KB Output is correct
23 Correct 25 ms 49496 KB Output is correct
24 Incorrect 24 ms 49756 KB Output isn't correct
25 Halted 0 ms 0 KB -