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답안 #337968

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
337968 2020-12-22T08:02:40 Z Kerim 아름다운 순열 (IZhO12_beauty) C++17
100 / 100
 2708 ms 164716 KB 
#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int n,all,two[22],three[22];
ll dp[1<<20][20];
ll rec(int mask,int last){
	if(mask==all)return 1;
	ll &ret=dp[mask][last];
	if(~ret)
		return ret;ret=0;
	for(int i=0;i<n;i++)
		if(!(mask>>i&1) and (two[i]==two[last] or three[i]==three[last]))
			ret+=rec(mask|(1<<i),i);
	return ret;	
}
int main(){
  //  freopen("file.in", "r", stdin);
    memset(dp,-1,sizeof dp);
    scanf("%d",&n);all=(1<<n)-1;
    for(int i=0;i<n;i++){
    	int x,xx;
		scanf("%d",&x);xx=x;
		while(x>=1){
			if(x%2==1)
				two[i]++;
			x/=2;
		}x=xx;
		while(x>=1){
			if(x%3==1)
				three[i]++;
			x/=3;	
		}
    }
    ll ans=0;
    for(int i=0;i<n;i++)
    	ans+=rec(1<<i,i);
    printf("%lld\n",ans);
	return 0;
}

Compilation message

beauty.cpp: In function 'll rec(int, int)':
beauty.cpp:25:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   25 |  if(~ret)
      |  ^~
beauty.cpp:26:14: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   26 |   return ret;ret=0;
      |              ^~~
beauty.cpp: In function 'int main()':
beauty.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |     scanf("%d",&n);all=(1<<n)-1;
      |     ~~~~~^~~~~~~~~
beauty.cpp:38:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |   scanf("%d",&x);xx=x;
      |   ~~~~~^~~~~~~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 77 ms 164460 KB Output is correct
2 Correct 78 ms 164460 KB Output is correct
3 Correct 79 ms 164460 KB Output is correct
4 Correct 78 ms 164460 KB Output is correct
5 Correct 79 ms 164460 KB Output is correct
6 Correct 80 ms 164460 KB Output is correct
7 Correct 76 ms 164460 KB Output is correct
8 Correct 78 ms 164460 KB Output is correct
9 Correct 79 ms 164460 KB Output is correct
10 Correct 77 ms 164588 KB Output is correct
11 Correct 87 ms 164460 KB Output is correct
12 Correct 85 ms 164460 KB Output is correct
13 Correct 138 ms 164588 KB Output is correct
14 Correct 445 ms 164460 KB Output is correct
15 Correct 561 ms 164588 KB Output is correct
16 Correct 379 ms 164588 KB Output is correct
17 Correct 500 ms 164716 KB Output is correct
18 Correct 311 ms 164716 KB Output is correct
19 Correct 2625 ms 164588 KB Output is correct
20 Correct 2708 ms 164588 KB Output is correct