oj.uz

Submission #1102176

# Submission time Handle Problem Language Result Execution time Memory
1102176 2024-10-17T15:36:46 Z quocthang Zapina (COCI20_zapina) C++14
110 / 110
 269 ms 3668 KB 
#include <bits/stdc++.h>
#define base 31
#define fi first
#define endl "\n"
#define se second
#define NAME "FILE"
#define ll long long
#define int long long
#define mod 1000000007
#define pii pair<int,int>
#define bit(mask,i) (mask&(1<<i))
#define lcm(a,b) ((a*b)/__gcd(a,b))
#define turn_on(mask,i) (mask|(1<<i))
#define turn_off(mask,i) (mask^(1<<i))

template <class T1, class T2>
bool maximize(T1 &a, T2 b){if (a < b){a = b; return 1;} return 0;}

template <class T1, class T2>
bool minimize(T1 &a, T2 b){if (a > b){a = b; return 1;} return 0;}

template <class T1, class T2>
void add(T1 &a, T2 b){a += b; if (a >= mod) a -= mod;}

template <class T1, class T2>
void sub(T1 &a, T2 b){a -= b; if (a < 0) a += mod;}

using namespace std;
int dp[360][360][2];
int C[360][360];
int POW[360],n;
int lt(int a,int k){
	if(k==0)return 1;
	if(k==1)return a;
	int b=lt(a,k/2);
	(b*=b)%=mod;
	if(k&1)(b*=a)%=mod;
	return b;
}
// (n!)/(k!(n-k)!)
int c(int n,int k){
	if(k>n)return 0;
	if(C[n][k]!=-1)return C[n][k];
	int tmp=(POW[k]%mod*POW[n-k]%mod)%mod;
	 tmp=(POW[n]%mod*lt(tmp,mod-2)%mod+mod)%mod;
	 return C[n][k]=tmp;
}
int calc(int id,int job,bool is){
	if(!id)return is && job==0;
	if(dp[id][job][is]!=-1)return dp[id][job][is];
	int res=0;
	for(int i=0;i<=job;i++){
	 // cout<<job<<endl;
		add(res,calc(id-1,job-i,(i==id)||is)*c(job,i)%mod);
	}
	return dp[id][job][is]=res;
}
signed main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);cout.tie(NULL);
	if (fopen(NAME".inp","r")){
		freopen(NAME".inp","r",stdin);
		freopen(NAME".out","w",stdout);
	}
	POW[0]=1;
	for(int i=1;i<=350;i++)POW[i]=POW[i-1]*i%mod;
// 	for(int i=1;i<=350;i++)
// 		for(int j=1;j<=350;j++) C[i][j]=c(i,j)%mod;
	memset(dp,-1,sizeof dp);
	memset(C,-1,sizeof C);
	cin>>n;	
	cout<<calc(n,n,0);
}

Compilation message

zapina.cpp: In function 'int main()':
zapina.cpp:62:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |   freopen(NAME".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
zapina.cpp:63:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |   freopen(NAME".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3424 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 1 ms 3412 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 1 ms 3412 KB Output is correct
16 Correct 1 ms 3412 KB Output is correct

Subtask #3
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Correct 2 ms 3412 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 2 ms 3412 KB Output is correct
9 Correct 2 ms 3424 KB Output is correct
10 Correct 2 ms 3412 KB Output is correct
11 Correct 1 ms 3412 KB Output is correct
12 Correct 2 ms 3412 KB Output is correct
13 Correct 2 ms 3412 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 1 ms 3412 KB Output is correct
16 Correct 1 ms 3412 KB Output is correct
17 Correct 128 ms 3412 KB Output is correct
18 Correct 3 ms 3412 KB Output is correct
19 Correct 31 ms 3412 KB Output is correct
20 Correct 2 ms 3412 KB Output is correct
21 Correct 165 ms 3412 KB Output is correct
22 Correct 23 ms 3412 KB Output is correct
23 Correct 4 ms 3412 KB Output is correct
24 Correct 38 ms 3412 KB Output is correct
25 Correct 28 ms 3412 KB Output is correct
26 Correct 51 ms 3412 KB Output is correct
27 Correct 245 ms 3412 KB Output is correct
28 Correct 257 ms 3412 KB Output is correct
29 Correct 251 ms 3576 KB Output is correct
30 Correct 250 ms 3520 KB Output is correct
31 Correct 251 ms 3416 KB Output is correct
32 Correct 269 ms 3412 KB Output is correct
33 Correct 265 ms 3576 KB Output is correct
34 Correct 257 ms 3412 KB Output is correct
35 Correct 268 ms 3516 KB Output is correct
36 Correct 257 ms 3668 KB Output is correct
37 Correct 253 ms 3412 KB Output is correct