Submission #998391

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
998391	2024-06-13T19:51:16 Z	ag_1204	Tents (JOI18_tents)	C++17	100 / 100	73 ms	70828 KB

tents

#include<bits/stdc++.h>
using namespace std;
#define ll long long int

int main(){
    ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    ll mod=1e9+7;
    ll h,w; cin>>h>>w;
    ll grid[h+1][w+1];
    for (ll i=0;i<=h;i++) {
        for (ll j=0;j<=w;j++) {
            if (i==0 || j==0) {
                grid[i][j]=1;
            } else {
                grid[i][j]=0;
            }
        }
    }
    for (ll i=1;i<=h;i++) {
        for (ll j=1;j<=w;j++) {
            grid[i][j]=grid[i-1][j];
    		if (j>1) {
    		    ll k1=j*(j-1);
    		    k1/=2;
    		    k1*=grid[i-1][j-2];
    		    grid[i][j]+=k1;
    		}
    		if (i>1) {
			    ll k2=j*(i-1);
			    k2*=grid[i-2][j-1];
			    grid[i][j]+=k2;
			}
    		ll k=4*j;
    		k*=grid[i-1][j-1];
			grid[i][j]+=k;
			grid[i][j]%=mod;
        }
    }
    grid[h][w]--;
    cout<<grid[h][w]<<endl;
	return 0;
}

Subtask #1

48.0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	460 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	604 KB	Output is correct
7	Correct	0 ms	604 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	0 ms	604 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	1116 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	460 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	604 KB	Output is correct
7	Correct	0 ms	604 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	0 ms	604 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	1 ms	1116 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	41 ms	44124 KB	Output is correct
16	Correct	3 ms	3164 KB	Output is correct
17	Correct	10 ms	10168 KB	Output is correct
18	Correct	11 ms	12488 KB	Output is correct
19	Correct	47 ms	51288 KB	Output is correct
20	Correct	42 ms	41048 KB	Output is correct
21	Correct	25 ms	27224 KB	Output is correct
22	Correct	29 ms	26768 KB	Output is correct
23	Correct	15 ms	14940 KB	Output is correct
24	Correct	73 ms	70828 KB	Output is correct
25	Correct	48 ms	52560 KB	Output is correct
26	Correct	54 ms	60380 KB	Output is correct
27	Correct	68 ms	68176 KB	Output is correct