Submission #794471

#	Time	Username	Problem	Language	Result	Execution time	Memory
794471		YassirSalama	곤돌라 (IOI14_gondola)	C++14	55 / 100	42 ms	8696 KiB

gondola

#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;
#define OVL(v,s) for(auto x:v) cout<<x<<s;cout<<endl;
#define dbg(x) cout << "[ " << #x << " ] : " << x<<endl;
#define F first
#define S second
const int mod=1e9+9;
#define all(v) v.begin(),v.end()
#define ll long long
ll binpow(ll a,ll b){
	ll res=1;
	while(b>0){
		if(b&1) res=(res%mod*a%mod)%mod;
		b>>=1;
		a=(a%mod*a%mod)%mod;
	}
	return res;
}
const int INF=1e6;
vector<int> get_sequence(int n,vector<int> v){
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n+1;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n&&v[i]<=n){
			v[i+1]=v[i]%n+1;
		}
	}
	for(int i=n-2;i>=0;i--){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n+1;
				continue;
			}
		}
	}
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n&&v[i]<=n){
			v[i+1]=v[i]%n+1;
		}
	}
	for(int i=n-2;i;i--){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n&&v[i]<=n){
			v[i+1]=v[i]%n+1;
		}
	}
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n&&v[i]<=n){
			v[i+1]=v[i]%n+1;
		}
	}
	bool ok=true;
	for(int i=0;i<n;i++) ok&=v[i]>n;
	if(ok){
		v[n-1]=1;
		return get_sequence(n,v);
	}
	return v;}
int valid(int n,int arr[]){
	vector<int> v;
	for(int i=0;i<n;i++) v.push_back(arr[i]);
	set<int> s;
	set<int> ss;
	for(int i=0;i<n;i++) ss.insert(arr[i]);
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n){
			v[i+1]=v[i]%n+1;
		}
	}
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-2+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n){
			v[i+1]=v[i]%n+1;
		}
	}
	for(int i=0;i<n-1;i++){
		if(v[i]>v[i+1]){
			if(v[i]>n&&v[i+1]<=n){
				v[i]=(v[i+1]-1+n)%n;
				continue;
			}
		}
		if(v[i]<v[i+1]&&v[i+1]>n){
			v[i+1]=v[i]%n+1;
		}
	}
	int index=0;
	for(int i=0;i<n-1;i++){
		if(v[i]<=v[i+1]) index=i+1;
		else{
			index=i+1;
			break;
		}
	}
	bool ok=true;
	for(int i=index;i<n-1;i++){
		ok&=(v[i]<=v[i+1]);
	}
	for(int i=0;i<index-1;i++){
		ok&=v[i]<=v[i+1];
	}
	for(int i=0;i<n;i++) s.insert(v[i]);
	ok&=(s.size()==n&&ss.size()==n);
	return ok;}
int replacement(int n, int arr[], int replacementSeq[]){
	vector<int> v;
	for(int i=0;i<n;i++) v.push_back(arr[i]);
	vector<int> vv=get_sequence(n,v);
	set<pair<int,int>> s;
	for(int i=0;i<n;i++){
		if(v[i]>n) s.insert({v[i],i}); 
	}
	vector<int> c;
	int start=n+1;
	for(auto it=s.begin();it!=s.end();it++){
		int f=0;
		while(start<=(*it).F) {
			if(f==0) c.push_back(vv[(*it).S]);
			else{ 
				c.push_back(start);
				start++;
			}
			if(start==(*it).F) break;
			f++;
		}
		start++;
	}
	for(int i=0;i<c.size();i++) replacementSeq[i]=c[i];
	return c.size();}
int countReplacement(int n, int arr[]){
	bool x=valid(n,arr);
	if(x==false) return 0;
	vector<int> v;
	for(int i=0;i<n;i++) v.push_back(arr[i]);
	vector<int> vv;
 	for(int i=1;i<n;i++){
 		if(v[i]>n) vv.push_back(v[i]);
 	}
 	vector<int> c=get_sequence(n,v);
 	bool ok=true;
 	set<int> s;
 	// OVL(c," ")
 	//check wach no solutions exists first
 	for(int i=0;i<n;i++){ ok&=(c[i]<=n&&s.find(c[i])==s.end());s.insert(c[i]);}
 	// dbg(ok);
 	// if(!ok) return 0;
 	sort(all(vv));
 	sort(all(v));
 	// OVL(vv," ")
 	ll ans=1;
 	ll lst=n;
 	for(int i=0;i<vv.size();i++){
 		ans=(ans%mod*binpow(vv.size()-i,vv[i]-lst-1)%mod)%mod;
 		ans%=mod;
 		lst=vv[i];
 	}
 	if(ans>=mod) ans-=mod;
 	if(vv.size()==n) {
 		ans=(ans*n)%mod;
 	}
 	if(ans<0) ans+=mod;
 	if(ans>=mod) ans-=mod;
 	return (int)(ans%mod);

}
 
 
// int gondolaSequence[100001];
// int replacementSequence[250001];
 
// int main() {
//   int i, n, tag;
//   int nr;
//   assert(scanf("%d", &tag) == 1);
//   assert(scanf("%d", &n) == 1);
//   for (i = 0; i < n; i++)
//     assert(scanf("%d", &gondolaSequence[i]) == 1);
 
//   switch (tag) {
//   case 1:
//   case 2:
//   case 3:
//     printf("%d\n", valid(n, gondolaSequence));
//     break;
 
//   case 4:
//   case 5:
//   case 6:
//     nr = replacement(n, gondolaSequence, replacementSequence);
//     printf("%d ", nr);
//     if (nr > 0) {
//       for (i = 0; i < nr - 1; i++)
//         printf("%d ", replacementSequence[i]);
//       printf("%d\n", replacementSequence[nr - 1]);
//     } else
//       printf("\n");
//     break;
 
//   case 7:
//   case 8:
//   case 9:
//   case 10:
//     printf("%d\n", countReplacement(n, gondolaSequence));
//     break;
//   }
 
//   return 0;
// }

Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:136:15: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  136 |  ok&=(s.size()==n&&ss.size()==n);
      |       ~~~~~~~~^~~
gondola.cpp:136:29: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  136 |  ok&=(s.size()==n&&ss.size()==n);
      |                    ~~~~~~~~~^~~
gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:161:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  161 |  for(int i=0;i<c.size();i++) replacementSeq[i]=c[i];
      |              ~^~~~~~~~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:185:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  185 |   for(int i=0;i<vv.size();i++){
      |               ~^~~~~~~~~~
gondola.cpp:191:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  191 |   if(vv.size()==n) {
      |      ~~~~~~~~~^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 0 / 5
• Subtask 8: 0 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10