oj.uz

Submission #765307

# Submission time Handle Problem Language Result Execution time Memory
765307 2023-06-24T10:36:30 Z bachhoangxuan Tents (JOI18_tents) C++17
100 / 100
 75 ms 70912 KB 
// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma,tune=native")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
- insert(x),erase(x)
- find_by_order(k): return iterator to the k-th smallest element
- order_of_key(x): the number of elements that are strictly smaller
*/
#include<bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
uniform_real_distribution<> pp(0.0,1.0);
#define int long long
#define ld long double
#define pii pair<int,int>
#define piii pair<pii,int>
#define mpp make_pair
#define fi first
#define se second
const int inf=1e18;
const int mod=1e9+7;
const int maxn=200005;
const int bl=650;
const int maxs=655;
const int maxm=200005;
const int maxq=500005;
const int maxl=20;
const int maxa=250000;
const int root=3;
int power(int a,int n){
    int res=1;
    while(n){
        if(n&1) res=res*a%mod;
        a=a*a%mod;n>>=1;
    }
    return res;
}
const int iroot=power(3,mod-2);
const int base=101;

void solve(){
    int n,m;cin >> n >> m;
    vector<vector<int>> dp(n+1,vector<int>(m+1,1));
    for(int i=1;i<=n;i++){
        for(int j=0;j<=m;j++){
            dp[i][j]=dp[i-1][j];
            if(!j) continue;
            dp[i][j]=(dp[i][j]+dp[i-1][j-1]*j*4)%mod;
            if(i>=2) dp[i][j]=(dp[i][j]+dp[i-2][j-1]*(i-1)*j)%mod;
            if(j>=2) dp[i][j]=(dp[i][j]+dp[i-1][j-2]*(j*(j-1)/2))%mod;
        }
    }
    cout << (dp[n][m]+mod-1)%mod << '\n';
}
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    int test=1;//cin >> test;
    while(test--) solve();
}

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 980 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 0 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 980 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 452 KB Output is correct
15 Correct 46 ms 44172 KB Output is correct
16 Correct 4 ms 3156 KB Output is correct
17 Correct 11 ms 10068 KB Output is correct
18 Correct 13 ms 12500 KB Output is correct
19 Correct 55 ms 51400 KB Output is correct
20 Correct 43 ms 41196 KB Output is correct
21 Correct 29 ms 27204 KB Output is correct
22 Correct 30 ms 26836 KB Output is correct
23 Correct 21 ms 15072 KB Output is correct
24 Correct 75 ms 70912 KB Output is correct
25 Correct 55 ms 52564 KB Output is correct
26 Correct 74 ms 60392 KB Output is correct
27 Correct 74 ms 68164 KB Output is correct