oj.uz

Submission #139203

# Submission time Handle Problem Language Result Execution time Memory
139203 2019-07-31T11:31:06 Z zoooma13 Tents (JOI18_tents) C++14
48 / 100
 466 ms 108288 KB 
#include <bits/stdc++.h>
using namespace std;

const int mod = 1e9+7;
int GM(long long num){
    return num%mod;
}

int n ,m ,dp[302][302][302];
int solve(int p ,int l ,int t){
    if(t<0 || l<0)  return 0;
    if(p == n)      return !l;
    int&ret = dp[p][t][l];
    if(~ret)
        return ret;

    ret = solve(p+1 ,l ,t); ///nothing
    ret = GM(ret + 1LL*l*solve(p+1 ,l-1 ,t)); ///adding rest of vertical tent
    ret = GM(ret + 1LL*t*solve(p+1 ,l+1 ,t-1)); ///adding vertical tents
    ret = GM(ret + 4LL*t*solve(p+1 ,l ,t-1)); ///adding a solo tent
    ret = GM(ret + 1LL*t*(t-1)/2*solve(p+1 ,l ,t-2)); ///adding horizontal tents
    //cout << p << " " << l << " " << t << " = " << ret << endl;
    return ret;
}

int main()
{
    scanf("%d%d",&n,&m);
    memset(dp ,-1 ,sizeof dp);
    printf("%d\n",solve(0,0,m)-1);
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:28:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 93 ms 108280 KB Output is correct
2 Correct 92 ms 108152 KB Output is correct
3 Correct 92 ms 108152 KB Output is correct
4 Correct 92 ms 108152 KB Output is correct
5 Correct 95 ms 108152 KB Output is correct
6 Correct 125 ms 108152 KB Output is correct
7 Correct 103 ms 108152 KB Output is correct
8 Correct 110 ms 108132 KB Output is correct
9 Correct 93 ms 108080 KB Output is correct
10 Correct 196 ms 108288 KB Output is correct
11 Correct 92 ms 108152 KB Output is correct
12 Correct 466 ms 108280 KB Output is correct

Subtask #2
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 93 ms 108280 KB Output is correct
2 Correct 92 ms 108152 KB Output is correct
3 Correct 92 ms 108152 KB Output is correct
4 Correct 92 ms 108152 KB Output is correct
5 Correct 95 ms 108152 KB Output is correct
6 Correct 125 ms 108152 KB Output is correct
7 Correct 103 ms 108152 KB Output is correct
8 Correct 110 ms 108132 KB Output is correct
9 Correct 93 ms 108080 KB Output is correct
10 Correct 196 ms 108288 KB Output is correct
11 Correct 92 ms 108152 KB Output is correct
12 Correct 466 ms 108280 KB Output is correct
13 Correct 92 ms 108052 KB Output is correct
14 Incorrect 92 ms 108164 KB Output isn't correct
15 Halted 0 ms 0 KB -