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Submission #1087228

# Submission time Handle Problem Language Result Execution time Memory
1087228 2024-09-12T10:33:43 Z mispertion Boat (APIO16_boat) C++17
9 / 100
 684 ms 4988 KB 
#include <bits/stdc++.h>

using namespace std;    
#pragma GCC optimize("Ofast")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
#define int ll
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pb push_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mispertion ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define F first
#define S second
#define getlast(s) (*s.rbegin())
#define debg cout << "OK\n"

const ld PI = 3.1415926535;
const int N = 5e4 + 10;
const int M = 1e5 + 10;
int mod = 1e9+7;
const int infi = INT_MAX;
const ll infl = 2e18;
const int P = 505319;
const ld eps = 1e-9;

int mult(int a, int b){
    return a * 1LL * b % mod;
}

int sum(int a, int b){
    a %= mod;
    b %= mod;
    if(a + b >= mod)
        return a + b - mod;
    if(a + b < 0)
        return a + b + mod;
    return a + b;
}

int binpow(int a, int n){
    if (n == 0)
        return 1;
    if (n % 2 == 1){
        return mult(binpow(a, n - 1), a);
    }
    else{
        auto b = binpow(a, n / 2);
        return mult(b, b);
    }
}

int n, l[N], r[N], sm[N], f[N], fi[N];
vector<int> al[N];

int C(int n, int k){
    return mult(f[n], mult(fi[k], fi[n - k]));
}

void solve(){
    cin >> n;
    vector<int> di = {};
    for(int i = 1; i <= n; i++){
        cin >> l[i] >> r[i];
        di.pb(l[i]);
        di.pb(r[i] + 1);
    }
    di.pb(0);
    sort(all(di));
    di.resize(unique(all(di)) - di.begin());
    sm[0] = 1;
    al[0].pb(1);
    for(int i = 1; i <= n; i++){
        int cur = 0;
        for(int j = 0; j < sz(di) - 1; j++){
            int lr = di[j], rr = di[j + 1] - 1;
            int len = rr - lr + 1;
            if(lr >= l[i] && rr <= r[i]){
                al[j].pb(cur);
                int nsm = 0;
                for(int k = 0; k < sz(al[j]); k++){
                    nsm =sum(nsm, mult(C(sz(al[j]) - k - 1 + len, sz(al[j]) - k), al[j][k]));
                }
                cur = sum(cur, sm[j]);
                sm[j] = nsm;
            }else{
                cur = sum(cur, sm[j]);
            }
        }
    }
    int ans = 0;
    for(int i = 0; i < sz(di) - 1; i++)
        ans = sum(ans, sm[i]);
    cout << sum(ans, -1) << '\n';
}   

signed main(){
    mispertion;
    f[0] = 1;
    for(int i = 1; i < N; i++)
        f[i] = mult(f[i - 1], i);
    for(int i = 0; i < N; i++){
        fi[i] = binpow(f[i], mod - 2);
    }
    int t = 1;
    //cin >> t;
    while (t--){
        solve();
    }
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2392 KB Output is correct
2 Correct 18 ms 2328 KB Output is correct
3 Correct 18 ms 2428 KB Output is correct
4 Correct 18 ms 2392 KB Output is correct
5 Correct 18 ms 2264 KB Output is correct
6 Correct 18 ms 2392 KB Output is correct
7 Correct 18 ms 2460 KB Output is correct
8 Correct 18 ms 2336 KB Output is correct
9 Correct 18 ms 2392 KB Output is correct
10 Correct 18 ms 2424 KB Output is correct
11 Correct 18 ms 2396 KB Output is correct
12 Correct 18 ms 2420 KB Output is correct
13 Correct 18 ms 2392 KB Output is correct
14 Correct 18 ms 2396 KB Output is correct
15 Correct 18 ms 2396 KB Output is correct
16 Correct 16 ms 2432 KB Output is correct
17 Correct 16 ms 2396 KB Output is correct
18 Correct 17 ms 2392 KB Output is correct
19 Correct 16 ms 2396 KB Output is correct
20 Correct 16 ms 2396 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2392 KB Output is correct
2 Correct 18 ms 2328 KB Output is correct
3 Correct 18 ms 2428 KB Output is correct
4 Correct 18 ms 2392 KB Output is correct
5 Correct 18 ms 2264 KB Output is correct
6 Correct 18 ms 2392 KB Output is correct
7 Correct 18 ms 2460 KB Output is correct
8 Correct 18 ms 2336 KB Output is correct
9 Correct 18 ms 2392 KB Output is correct
10 Correct 18 ms 2424 KB Output is correct
11 Correct 18 ms 2396 KB Output is correct
12 Correct 18 ms 2420 KB Output is correct
13 Correct 18 ms 2392 KB Output is correct
14 Correct 18 ms 2396 KB Output is correct
15 Correct 18 ms 2396 KB Output is correct
16 Correct 16 ms 2432 KB Output is correct
17 Correct 16 ms 2396 KB Output is correct
18 Correct 17 ms 2392 KB Output is correct
19 Correct 16 ms 2396 KB Output is correct
20 Correct 16 ms 2396 KB Output is correct
21 Correct 312 ms 4180 KB Output is correct
22 Correct 298 ms 4268 KB Output is correct
23 Correct 261 ms 3952 KB Output is correct
24 Correct 294 ms 4180 KB Output is correct
25 Correct 308 ms 4176 KB Output is correct
26 Correct 660 ms 4692 KB Output is correct
27 Correct 684 ms 4740 KB Output is correct
28 Correct 669 ms 4988 KB Output is correct
29 Correct 659 ms 4688 KB Output is correct
30 Correct 19 ms 2396 KB Output is correct
31 Correct 18 ms 2436 KB Output is correct
32 Incorrect 18 ms 2368 KB Output isn't correct
33 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 17 ms 4444 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 2392 KB Output is correct
2 Correct 18 ms 2328 KB Output is correct
3 Correct 18 ms 2428 KB Output is correct
4 Correct 18 ms 2392 KB Output is correct
5 Correct 18 ms 2264 KB Output is correct
6 Correct 18 ms 2392 KB Output is correct
7 Correct 18 ms 2460 KB Output is correct
8 Correct 18 ms 2336 KB Output is correct
9 Correct 18 ms 2392 KB Output is correct
10 Correct 18 ms 2424 KB Output is correct
11 Correct 18 ms 2396 KB Output is correct
12 Correct 18 ms 2420 KB Output is correct
13 Correct 18 ms 2392 KB Output is correct
14 Correct 18 ms 2396 KB Output is correct
15 Correct 18 ms 2396 KB Output is correct
16 Correct 16 ms 2432 KB Output is correct
17 Correct 16 ms 2396 KB Output is correct
18 Correct 17 ms 2392 KB Output is correct
19 Correct 16 ms 2396 KB Output is correct
20 Correct 16 ms 2396 KB Output is correct
21 Correct 312 ms 4180 KB Output is correct
22 Correct 298 ms 4268 KB Output is correct
23 Correct 261 ms 3952 KB Output is correct
24 Correct 294 ms 4180 KB Output is correct
25 Correct 308 ms 4176 KB Output is correct
26 Correct 660 ms 4692 KB Output is correct
27 Correct 684 ms 4740 KB Output is correct
28 Correct 669 ms 4988 KB Output is correct
29 Correct 659 ms 4688 KB Output is correct
30 Correct 19 ms 2396 KB Output is correct
31 Correct 18 ms 2436 KB Output is correct
32 Incorrect 18 ms 2368 KB Output isn't correct
33 Halted 0 ms 0 KB -