oj.uz

Submission #236878

# Submission time Handle Problem Language Result Execution time Memory
236878 2020-06-03T15:46:58 Z nishkarsh Tents (JOI18_tents) C++14
100 / 100
 244 ms 70904 KB 
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pcc pair<char,char>
#define vi vector <int>
#define vl vector <ll>
#define sd(x) scanf("%d",&x)
#define slld(x) scanf("%lld",&x)
#define pd(x) printf("%d",x)
#define plld(x) printf("%lld",x)
#define pds(x) printf("%d ",x)
#define pllds(x) printf("%lld ",x)
#define pdn(x) printf("%d\n",x)
#define plldn(x) printf("%lld\n",x)
#define INF 2e9
#define INFLL 4e18
using namespace std;
ll powmod(ll base,ll exponent,ll mod){ // with mod < 1e9
	ll ans=1;
	while(exponent){
		if(exponent&1)ans=(ans*base)%mod;
		base=(base*base)%mod;
		exponent/=2;
	}
	return ans;
}
ll gcd(ll a, ll b){
	if(b==0) return a;
	else return gcd(b,a%b);
}
const int upperlimit = 3e3+1;
const int mod = 1e9+7;
ll dp[upperlimit][upperlimit];
int main() {
//	freopen(".in","r",stdin);freopen(".out","w",stdout);
	for(int i = 0; i < upperlimit; i++){
		dp[i][0]=dp[0][i]=1;
	}
	for(int i = 1; i < upperlimit; i++){
		dp[i][1]=dp[1][i]=((i*(i-1))/2)+(4*i)+1;
	}
	for(int i = 2; i < upperlimit; i++){
		for(int j = 2; j < upperlimit; j++){
			dp[i][j]=4*dp[i-1][j-1];
			ll calc=i-1;calc*=dp[i-2][j-1];calc%=mod;
			dp[i][j]+=calc;dp[i][j]%=mod;
			calc=j-1;calc*=dp[i-1][j-2];calc%=mod;
			dp[i][j]+=calc;dp[i][j]%=mod;
			calc=i-1;calc*=i-2;calc>>=1;calc*=dp[i-2][j-1];calc%=mod;
			dp[i][j]+=calc;dp[i][j]%=mod;
			calc=i-1;calc*=4;calc*=dp[i-1][j-1];calc%=mod;
			dp[i][j]+=calc;dp[i][j]%=mod;
			calc=i-1;calc*=j-1;calc*=dp[i-1][j-2];calc%=mod;
			dp[i][j]+=calc;dp[i][j]%=mod;
			dp[i][j]+=dp[i][j-1];dp[i][j]%=mod;
		}
	}
	int h,w;
	sd(h);sd(w);
	plld(dp[h][w]-1);
	return 0;
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:12:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define sd(x) scanf("%d",&x)
               ~~~~~^~~~~~~~~
tents.cpp:64:2: note: in expansion of macro 'sd'
  sd(h);sd(w);
  ^~
tents.cpp:12:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define sd(x) scanf("%d",&x)
               ~~~~~^~~~~~~~~
tents.cpp:64:8: note: in expansion of macro 'sd'
  sd(h);sd(w);
        ^~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 228 ms 70904 KB Output is correct
2 Correct 230 ms 70788 KB Output is correct
3 Correct 234 ms 70740 KB Output is correct
4 Correct 223 ms 70776 KB Output is correct
5 Correct 236 ms 70776 KB Output is correct
6 Correct 222 ms 70776 KB Output is correct
7 Correct 222 ms 70904 KB Output is correct
8 Correct 233 ms 70776 KB Output is correct
9 Correct 218 ms 70776 KB Output is correct
10 Correct 222 ms 70776 KB Output is correct
11 Correct 217 ms 70776 KB Output is correct
12 Correct 218 ms 70776 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 228 ms 70904 KB Output is correct
2 Correct 230 ms 70788 KB Output is correct
3 Correct 234 ms 70740 KB Output is correct
4 Correct 223 ms 70776 KB Output is correct
5 Correct 236 ms 70776 KB Output is correct
6 Correct 222 ms 70776 KB Output is correct
7 Correct 222 ms 70904 KB Output is correct
8 Correct 233 ms 70776 KB Output is correct
9 Correct 218 ms 70776 KB Output is correct
10 Correct 222 ms 70776 KB Output is correct
11 Correct 217 ms 70776 KB Output is correct
12 Correct 218 ms 70776 KB Output is correct
13 Correct 228 ms 70904 KB Output is correct
14 Correct 229 ms 70776 KB Output is correct
15 Correct 218 ms 70776 KB Output is correct
16 Correct 217 ms 70776 KB Output is correct
17 Correct 224 ms 70776 KB Output is correct
18 Correct 223 ms 70776 KB Output is correct
19 Correct 222 ms 70780 KB Output is correct
20 Correct 220 ms 70776 KB Output is correct
21 Correct 230 ms 70776 KB Output is correct
22 Correct 244 ms 70776 KB Output is correct
23 Correct 222 ms 70776 KB Output is correct
24 Correct 216 ms 70780 KB Output is correct
25 Correct 223 ms 70776 KB Output is correct
26 Correct 216 ms 70776 KB Output is correct
27 Correct 225 ms 70776 KB Output is correct