oj.uz

Submission #792897

# Submission time Handle Problem Language Result Execution time Memory
792897 2023-07-25T10:39:52 Z Cookie Boat (APIO16_boat) C++14
100 / 100
 460 ms 4428 KB 
#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("FEEDING.INP");
ofstream fout("FEEDING.OUT");
#define sz(a) (int)a.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ld PI = 3.14159265359;
using u128 = __uint128_t;
const int x[4] = {1, -1, 0, 0};
const int y[4] = {0, 0, 1, -1};
const ll mod = 1e9 + 7, inf = 1e16;
const int mxn = 3e5 + 5;
int n;
ll l[505], r[505], inv[505], dp[1005][505];
ll pw(ll a, ll b){
    ll res = 1;
    for(;b;b >>= 1){
        if(b & 1){
            res = (res * a) % mod;
        }
        a = (a * a) % mod;
    }
    return(res);
}
signed main()
{
     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    vt<int>comp;
    for(int i = 1; i <= n; i++){
        cin >> l[i] >> r[i];
        inv[i] = pw(i, mod - 2);
        comp.pb(l[i]); comp.pb(r[i] + 1);
    }
    comp.pb(0);
    sort(comp.begin(), comp.end()); comp.resize(unique(comp.begin(), comp.end()) - comp.begin());
    for(int i = 0; i <= n; i++){
        dp[0][i] = 1;
    }
    for(int i = 1; i < sz(comp) - 1; i++){
        for(int j = 0; j <= n; j++){
            dp[i][j] = dp[i - 1][j];
            ll ways = 1, cnt = 0;
            for(int k = j; k >= 1; k--){
                if(l[k] <= comp[i] && comp[i + 1] - 1 <= r[k]){
                    cnt++;
                    ll sus = ((comp[i + 1] - comp[i] + cnt - 1) * inv[cnt]) % mod;
                    ways = (ways * sus) % mod;
                    //cout << sus << " ";
                    dp[i][j] = (dp[i][j] + dp[i - 1][k - 1] * ways) % mod;
                }
            }
        }
    }
    cout << (dp[sz(comp) - 2][n] - 1 + mod) % mod;
    return(0);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 4188 KB Output is correct
2 Correct 158 ms 4228 KB Output is correct
3 Correct 164 ms 4304 KB Output is correct
4 Correct 163 ms 4188 KB Output is correct
5 Correct 162 ms 4288 KB Output is correct
6 Correct 133 ms 4220 KB Output is correct
7 Correct 145 ms 4284 KB Output is correct
8 Correct 133 ms 4224 KB Output is correct
9 Correct 130 ms 4192 KB Output is correct
10 Correct 128 ms 4232 KB Output is correct
11 Correct 131 ms 4280 KB Output is correct
12 Correct 144 ms 4180 KB Output is correct
13 Correct 134 ms 4212 KB Output is correct
14 Correct 124 ms 4200 KB Output is correct
15 Correct 149 ms 4232 KB Output is correct
16 Correct 29 ms 972 KB Output is correct
17 Correct 34 ms 1080 KB Output is correct
18 Correct 30 ms 984 KB Output is correct
19 Correct 31 ms 972 KB Output is correct
20 Correct 31 ms 1028 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 4188 KB Output is correct
2 Correct 158 ms 4228 KB Output is correct
3 Correct 164 ms 4304 KB Output is correct
4 Correct 163 ms 4188 KB Output is correct
5 Correct 162 ms 4288 KB Output is correct
6 Correct 133 ms 4220 KB Output is correct
7 Correct 145 ms 4284 KB Output is correct
8 Correct 133 ms 4224 KB Output is correct
9 Correct 130 ms 4192 KB Output is correct
10 Correct 128 ms 4232 KB Output is correct
11 Correct 131 ms 4280 KB Output is correct
12 Correct 144 ms 4180 KB Output is correct
13 Correct 134 ms 4212 KB Output is correct
14 Correct 124 ms 4200 KB Output is correct
15 Correct 149 ms 4232 KB Output is correct
16 Correct 29 ms 972 KB Output is correct
17 Correct 34 ms 1080 KB Output is correct
18 Correct 30 ms 984 KB Output is correct
19 Correct 31 ms 972 KB Output is correct
20 Correct 31 ms 1028 KB Output is correct
21 Correct 297 ms 3880 KB Output is correct
22 Correct 305 ms 3996 KB Output is correct
23 Correct 348 ms 3832 KB Output is correct
24 Correct 309 ms 3876 KB Output is correct
25 Correct 330 ms 3832 KB Output is correct
26 Correct 413 ms 3832 KB Output is correct
27 Correct 395 ms 3788 KB Output is correct
28 Correct 389 ms 3860 KB Output is correct
29 Correct 390 ms 3788 KB Output is correct
30 Correct 133 ms 4168 KB Output is correct
31 Correct 129 ms 4228 KB Output is correct
32 Correct 128 ms 4252 KB Output is correct
33 Correct 127 ms 4296 KB Output is correct
34 Correct 129 ms 4172 KB Output is correct
35 Correct 167 ms 4180 KB Output is correct
36 Correct 160 ms 4264 KB Output is correct
37 Correct 158 ms 4168 KB Output is correct
38 Correct 161 ms 4232 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1108 KB Output is correct
2 Correct 3 ms 1108 KB Output is correct
3 Correct 4 ms 1108 KB Output is correct
4 Correct 3 ms 1108 KB Output is correct
5 Correct 4 ms 1108 KB Output is correct
6 Correct 4 ms 1108 KB Output is correct
7 Correct 4 ms 1108 KB Output is correct
8 Correct 4 ms 1108 KB Output is correct
9 Correct 5 ms 1108 KB Output is correct
10 Correct 5 ms 1108 KB Output is correct
11 Correct 4 ms 1068 KB Output is correct
12 Correct 4 ms 1108 KB Output is correct
13 Correct 4 ms 1108 KB Output is correct
14 Correct 4 ms 1108 KB Output is correct
15 Correct 4 ms 1108 KB Output is correct
16 Correct 2 ms 724 KB Output is correct
17 Correct 2 ms 724 KB Output is correct
18 Correct 2 ms 724 KB Output is correct
19 Correct 2 ms 724 KB Output is correct
20 Correct 2 ms 724 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 4188 KB Output is correct
2 Correct 158 ms 4228 KB Output is correct
3 Correct 164 ms 4304 KB Output is correct
4 Correct 163 ms 4188 KB Output is correct
5 Correct 162 ms 4288 KB Output is correct
6 Correct 133 ms 4220 KB Output is correct
7 Correct 145 ms 4284 KB Output is correct
8 Correct 133 ms 4224 KB Output is correct
9 Correct 130 ms 4192 KB Output is correct
10 Correct 128 ms 4232 KB Output is correct
11 Correct 131 ms 4280 KB Output is correct
12 Correct 144 ms 4180 KB Output is correct
13 Correct 134 ms 4212 KB Output is correct
14 Correct 124 ms 4200 KB Output is correct
15 Correct 149 ms 4232 KB Output is correct
16 Correct 29 ms 972 KB Output is correct
17 Correct 34 ms 1080 KB Output is correct
18 Correct 30 ms 984 KB Output is correct
19 Correct 31 ms 972 KB Output is correct
20 Correct 31 ms 1028 KB Output is correct
21 Correct 297 ms 3880 KB Output is correct
22 Correct 305 ms 3996 KB Output is correct
23 Correct 348 ms 3832 KB Output is correct
24 Correct 309 ms 3876 KB Output is correct
25 Correct 330 ms 3832 KB Output is correct
26 Correct 413 ms 3832 KB Output is correct
27 Correct 395 ms 3788 KB Output is correct
28 Correct 389 ms 3860 KB Output is correct
29 Correct 390 ms 3788 KB Output is correct
30 Correct 133 ms 4168 KB Output is correct
31 Correct 129 ms 4228 KB Output is correct
32 Correct 128 ms 4252 KB Output is correct
33 Correct 127 ms 4296 KB Output is correct
34 Correct 129 ms 4172 KB Output is correct
35 Correct 167 ms 4180 KB Output is correct
36 Correct 160 ms 4264 KB Output is correct
37 Correct 158 ms 4168 KB Output is correct
38 Correct 161 ms 4232 KB Output is correct
39 Correct 4 ms 1108 KB Output is correct
40 Correct 3 ms 1108 KB Output is correct
41 Correct 4 ms 1108 KB Output is correct
42 Correct 3 ms 1108 KB Output is correct
43 Correct 4 ms 1108 KB Output is correct
44 Correct 4 ms 1108 KB Output is correct
45 Correct 4 ms 1108 KB Output is correct
46 Correct 4 ms 1108 KB Output is correct
47 Correct 5 ms 1108 KB Output is correct
48 Correct 5 ms 1108 KB Output is correct
49 Correct 4 ms 1068 KB Output is correct
50 Correct 4 ms 1108 KB Output is correct
51 Correct 4 ms 1108 KB Output is correct
52 Correct 4 ms 1108 KB Output is correct
53 Correct 4 ms 1108 KB Output is correct
54 Correct 2 ms 724 KB Output is correct
55 Correct 2 ms 724 KB Output is correct
56 Correct 2 ms 724 KB Output is correct
57 Correct 2 ms 724 KB Output is correct
58 Correct 2 ms 724 KB Output is correct
59 Correct 328 ms 4216 KB Output is correct
60 Correct 313 ms 4288 KB Output is correct
61 Correct 315 ms 4356 KB Output is correct
62 Correct 331 ms 4288 KB Output is correct
63 Correct 317 ms 4212 KB Output is correct
64 Correct 453 ms 4220 KB Output is correct
65 Correct 444 ms 4340 KB Output is correct
66 Correct 449 ms 4256 KB Output is correct
67 Correct 453 ms 4428 KB Output is correct
68 Correct 460 ms 4288 KB Output is correct
69 Correct 361 ms 4312 KB Output is correct
70 Correct 378 ms 4236 KB Output is correct
71 Correct 365 ms 4272 KB Output is correct
72 Correct 391 ms 4204 KB Output is correct
73 Correct 367 ms 4304 KB Output is correct
74 Correct 62 ms 1016 KB Output is correct
75 Correct 66 ms 972 KB Output is correct
76 Correct 64 ms 1044 KB Output is correct
77 Correct 68 ms 1076 KB Output is correct
78 Correct 64 ms 984 KB Output is correct