Submission #589234

#	Time	Username	Problem	Language	Result	Execution time	Memory
589234		fuad27	Gondola (IOI14_gondola)	C++17	75 / 100	18 ms	2164 KiB

gondola

#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;
#define prev(i)	((i-1+n)%n)
typedef long long ll;
typedef long double ld;
const ll inf = 1e18;
const ll mod = 1e9+9;
#define pii		pair<int,int>
#define pll		pair<ll,ll>
#define vi		vector<int>
#define vll		vector<ll>
#define rep(i, a, b)	for(int i = (a);i<(b);i++)
#define repn(i, a, b)	for(int i = (a);i>=(b);i--)
#define ss		second
#define ff		first
#define mkp		make_pair
#define pb		push_back
 
#define all(x)		(x).begin(), (x).end()
ll binpow(ll a, ll b) {
   a%=mod;
   ll ans = 1;
   while(b) {
	   if(b&1ll) {
		   ans=(ans*a)%mod;
	   }
	   a=(a*a)%mod;
	   b>>=1ll;
   }
   return ans;
}   
int valid(int n, int a[])
{
	int cnt = a[0]-1;
	for(int i = 1;i<n-cnt;i++) {
		if(a[i] != a[i-1]+1) {
			return 0;
		}
	}
	for(int i = n-cnt+1;i<n;i++) {
		if(a[i]!=a[i-1]+1)return 0;	
	}
	if(cnt==0)return 1;
	if(a[0] != a[n-1]+1)return 0;
	return 1;
	return -1;
}
 
int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
	int cnt=0;
	for(int i = 0;i<n;i++) {
		if(gondolaSeq[i]>n)cnt++;	 
	}
	if(cnt == 0)return 0;
	else if(cnt == n) {
		vector<pair<int,int>> res;
		res.push_back(mkp(n,n));
		for(int i = 0;i<n;i++) {
			res.push_back(mkp(gondolaSeq[i], i+1));
		}
		sort(res.begin(), res.end());
		vector<int> ans;
		for(int i=1;i<(int)res.size();i++) {
			ans.push_back(res[i].second);
			for(int j = res[i-1].first;j<res[i].first-1;j++) {
				ans.push_back(j+1);
			}
		}
		for(int i=0;i<(int)ans.size();i++) {
			replacementSeq[i]=ans[i];
		}
		return (int)ans.size();
	}
	else {
		vector<pair<int,int>> res;
		res.push_back(make_pair(n,n));
		for(int i = 0;i<n;i++) {
			if(gondolaSeq[i] > n and gondolaSeq[prev(i)]<=n) {
				int tmp = gondolaSeq[i];
				gondolaSeq[i] = (gondolaSeq[prev(i)]%n)+1;
				res.push_back(make_pair(tmp, gondolaSeq[i]));
			}
		}
		for(int i = 0;i<n;i++) {
			if(gondolaSeq[i] > n and gondolaSeq[prev(i)]<=n) {
				int tmp = gondolaSeq[i];
				gondolaSeq[i] = (gondolaSeq[prev(i)]%n)+1;
				res.push_back(make_pair(tmp, gondolaSeq[i]));
			}
		}
		sort(res.begin(), res.end());
		vector<int> ans;
		for(int i=1;i<(int)res.size();i++) {
			ans.push_back(res[i].second);
			for(int j = res[i-1].first;j<res[i].first-1;j++) {
				ans.push_back(j+1);
			}
		}
		for(int i=0;i<(int)ans.size();i++) {
			replacementSeq[i]=ans[i];
		}
		return (int)ans.size();
	}
	return 0;
}
 
 
int countReplacement(int n, int inputSeq[])
{
	vll diff;
	int gondolaSeq[n];
	bool check=1;
	for(int i = 0;i<n;i++) {
		if(gondolaSeq[i]<=n)check=0;
	}
	rep(i, 0, n)gondolaSeq[i]=inputSeq[i];
	vector<pair<ll,ll>> res;
	res.push_back(make_pair(n,n));
	for(int i = 0;i<n;i++) {
		if(gondolaSeq[i] > n and gondolaSeq[prev(i)]<=n) {
			ll tmp = gondolaSeq[i];
			gondolaSeq[i] = (gondolaSeq[prev(i)]%n)+1;
		}
	}
	for(int i = 0;i<n;i++) {
		if(gondolaSeq[i] > n and gondolaSeq[prev(i)]<=n) {
			ll tmp = gondolaSeq[i];
			gondolaSeq[i] = (gondolaSeq[prev(i)]%n)+1;
		}
	}
	ll ans = 1;
	diff.pb(n);
	rep(i, 0, n) {
		if(inputSeq[i] > n)diff.pb(inputSeq[i]);
	}
	sort(all(diff));
	rep(i, 1, diff.size()) {
		ll d = diff[i]-diff[i-1]-1;
		if(d>0)ans=(ans*binpow(diff.size()-i, d))%mod;
	}
	if(!valid(n, gondolaSeq) and !check)return 0;
	if(check) {
		ll fc=n-1;
		ans=(ans*fc)%mod;
	}
	return ans;
}

Compilation message (stderr)

gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:123:7: warning: unused variable 'tmp' [-Wunused-variable]
  123 |    ll tmp = gondolaSeq[i];
      |       ^~~
gondola.cpp:129:7: warning: unused variable 'tmp' [-Wunused-variable]
  129 |    ll tmp = gondolaSeq[i];
      |       ^~~
gondola.cpp:13:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define rep(i, a, b) for(int i = (a);i<(b);i++)
      |                                       ^
gondola.cpp:139:2: note: in expansion of macro 'rep'
  139 |  rep(i, 1, diff.size()) {
      |  ^~~

• 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: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10