oj.uz

Submission #888862

# Submission time Handle Problem Language Result Execution time Memory
888862 2023-12-18T09:46:45 Z vjudge1 Passport (JOI23_passport) C++17
22 / 100
 2000 ms 57020 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<=2505){
	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 24 ms 49500 KB Output is correct
2 Correct 25 ms 49500 KB Output is correct
3 Correct 24 ms 49492 KB Output is correct
4 Correct 49 ms 57020 KB Output is correct
5 Correct 49 ms 56172 KB Output is correct
6 Correct 49 ms 56888 KB Output is correct
7 Correct 45 ms 56516 KB Output is correct
8 Correct 41 ms 55744 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 49636 KB Output is correct
3 Correct 25 ms 49500 KB Output is correct
4 Correct 24 ms 49416 KB Output is correct
5 Correct 23 ms 49496 KB Output is correct
6 Correct 24 ms 49496 KB Output is correct
7 Correct 25 ms 49492 KB Output is correct
8 Correct 24 ms 49500 KB Output is correct
9 Correct 24 ms 49588 KB Output is correct
10 Correct 23 ms 49496 KB Output is correct
11 Correct 25 ms 49576 KB Output is correct
12 Correct 25 ms 49500 KB Output is correct
13 Correct 24 ms 49500 KB Output is correct
14 Correct 23 ms 49456 KB Output is correct
15 Correct 25 ms 49500 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 49636 KB Output is correct
3 Correct 25 ms 49500 KB Output is correct
4 Correct 24 ms 49416 KB Output is correct
5 Correct 23 ms 49496 KB Output is correct
6 Correct 24 ms 49496 KB Output is correct
7 Correct 25 ms 49492 KB Output is correct
8 Correct 24 ms 49500 KB Output is correct
9 Correct 24 ms 49588 KB Output is correct
10 Correct 23 ms 49496 KB Output is correct
11 Correct 25 ms 49576 KB Output is correct
12 Correct 25 ms 49500 KB Output is correct
13 Correct 24 ms 49500 KB Output is correct
14 Correct 23 ms 49456 KB Output is correct
15 Correct 25 ms 49500 KB Output is correct
16 Correct 1737 ms 53404 KB Output is correct
17 Correct 986 ms 49704 KB Output is correct
18 Correct 39 ms 49728 KB Output is correct
19 Correct 56 ms 49696 KB Output is correct
20 Execution timed out 2056 ms 49680 KB Time limit exceeded
21 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 49636 KB Output is correct
3 Correct 25 ms 49500 KB Output is correct
4 Correct 24 ms 49416 KB Output is correct
5 Correct 23 ms 49496 KB Output is correct
6 Correct 24 ms 49496 KB Output is correct
7 Correct 25 ms 49492 KB Output is correct
8 Correct 24 ms 49500 KB Output is correct
9 Correct 24 ms 49588 KB Output is correct
10 Correct 23 ms 49496 KB Output is correct
11 Correct 25 ms 49576 KB Output is correct
12 Correct 25 ms 49500 KB Output is correct
13 Correct 24 ms 49500 KB Output is correct
14 Correct 23 ms 49456 KB Output is correct
15 Correct 25 ms 49500 KB Output is correct
16 Correct 1737 ms 53404 KB Output is correct
17 Correct 986 ms 49704 KB Output is correct
18 Correct 39 ms 49728 KB Output is correct
19 Correct 56 ms 49696 KB Output is correct
20 Execution timed out 2056 ms 49680 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 49500 KB Output is correct
2 Correct 25 ms 49500 KB Output is correct
3 Correct 24 ms 49492 KB Output is correct
4 Correct 49 ms 57020 KB Output is correct
5 Correct 49 ms 56172 KB Output is correct
6 Correct 49 ms 56888 KB Output is correct
7 Correct 45 ms 56516 KB Output is correct
8 Correct 41 ms 55744 KB Output is correct
9 Correct 24 ms 49500 KB Output is correct
10 Correct 23 ms 49636 KB Output is correct
11 Correct 25 ms 49500 KB Output is correct
12 Correct 24 ms 49416 KB Output is correct
13 Correct 23 ms 49496 KB Output is correct
14 Correct 24 ms 49496 KB Output is correct
15 Correct 25 ms 49492 KB Output is correct
16 Correct 24 ms 49500 KB Output is correct
17 Correct 24 ms 49588 KB Output is correct
18 Correct 23 ms 49496 KB Output is correct
19 Correct 25 ms 49576 KB Output is correct
20 Correct 25 ms 49500 KB Output is correct
21 Correct 24 ms 49500 KB Output is correct
22 Correct 23 ms 49456 KB Output is correct
23 Correct 25 ms 49500 KB Output is correct
24 Correct 1737 ms 53404 KB Output is correct
25 Correct 986 ms 49704 KB Output is correct
26 Correct 39 ms 49728 KB Output is correct
27 Correct 56 ms 49696 KB Output is correct
28 Execution timed out 2056 ms 49680 KB Time limit exceeded
29 Halted 0 ms 0 KB -