oj.uz

답안 #105262

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
105262 2019-04-11T05:13:50 Z he_____he Tents (JOI18_tents) C++14
100 / 100
 157 ms 70904 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

int readint(){
	int x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

const int cys=1000000007;
int n,m;
ll d[3005][3005];

int mod(int x){return x>=cys?x-cys:x;}

ll qpow(ll x,ll p){
	ll ret=1;
	for(;p;p>>=1,x=x*x%cys) if(p&1) ret=ret*x%cys;
	return ret;
}

int main(){
	n=readint(); m=readint();
	for(int i=0;i<=m;i++) d[0][i]=1;
	for(int i=1;i<=n;i++){
		for(int j=0;j<=m;j++){
			if(i) d[i][j]=d[i-1][j];
			if(i&&j) d[i][j]=mod(d[i][j]+4*j*d[i-1][j-1]%cys);
			if(i&&j>1) d[i][j]=mod(d[i][j]+(j*(j-1)/2)%cys*d[i-1][j-2]%cys);
			if(i>1&&j) d[i][j]=mod(d[i][j]+(i-1)*j%cys*d[i-2][j-1]%cys);
		}
	}
	printf("%lld\n",mod(d[n][m]+cys-1));
	return 0;
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:37:36: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
  printf("%lld\n",mod(d[n][m]+cys-1));
                  ~~~~~~~~~~~~~~~~~~^

Subtask #1
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 512 KB Output is correct
4 Correct 3 ms 1152 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 1408 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 4 ms 1792 KB Output is correct
11 Correct 2 ms 380 KB Output is correct
12 Correct 4 ms 2176 KB Output is correct

Subtask #2
52.0 / 52.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 512 KB Output is correct
4 Correct 3 ms 1152 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 3 ms 1408 KB Output is correct
7 Correct 4 ms 896 KB Output is correct
8 Correct 4 ms 1536 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 4 ms 1792 KB Output is correct
11 Correct 2 ms 380 KB Output is correct
12 Correct 4 ms 2176 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 9 ms 9728 KB Output is correct
15 Correct 130 ms 55280 KB Output is correct
16 Correct 11 ms 4096 KB Output is correct
17 Correct 25 ms 12920 KB Output is correct
18 Correct 32 ms 17144 KB Output is correct
19 Correct 127 ms 63028 KB Output is correct
20 Correct 100 ms 50940 KB Output is correct
21 Correct 71 ms 33824 KB Output is correct
22 Correct 65 ms 35544 KB Output is correct
23 Correct 40 ms 27128 KB Output is correct
24 Correct 147 ms 70904 KB Output is correct
25 Correct 123 ms 61204 KB Output is correct
26 Correct 139 ms 66652 KB Output is correct
27 Correct 157 ms 69068 KB Output is correct