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Submission #363989

# Submission time Handle Problem Language Result Execution time Memory
363989 2021-02-07T20:55:00 Z erfanmir Strange Device (APIO19_strange_device) C++17
25 / 100
 821 ms 51792 KB 
// In the name of god

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 

using namespace std;
using namespace __gnu_pbds; 

template < class T > using ordered_set = tree < T , null_type , less < T > , rb_tree_tag , tree_order_statistics_node_update >;
  
typedef long long                   ll;
typedef long double                 ld;
typedef pair<int,int>               pii;
typedef pair<ll,ll>                 pll;
#define all(x)                      (x).begin(),(x).end()
#define lc(x)                       (x) << 1
#define rc(x)                       (x) << 1 | 1
#define F                           first
#define S                           second
#define fast_io                     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io                     freopen("in.txt" , "r+" , stdin) ; freopen("out.txt" , "w+" , stdout);
#define mp                          make_pair
ll poww(ll a, ll b, ll md) {
    ll ans = 1;
    for(; b; b >>= 1, a = a * a % md){
        if(b & 1){
            ans = ans * a % md;
        }
    }
    return ans % md;
}

const int MAXN = 1e6 + 10;
const int MAXLG = 18;
const int MOD = 1e9 + 7;
const int MOD2 = 998244353;
const ll INF = 1e18 + 10;

int n, val[MAXN];
ll A, B, ans, l[MAXN], r[MAXN];
vector<ll> vec;
vector<pll> seg;

int main()
{
    scanf("%d %lld %lld", &n, &A, &B);
    for(int i = 1; i <= n; i++){
        scanf("%lld %lld", l + i, r + i);
    }
    ll x = A / __gcd(A, B + 1);
    if(x > INF / B){
        for(int i = 1; i <= n; i++){
            ans += r[i] - l[i] + 1;
        }
        printf("%lld\n", ans);
        return 0;
    }
    x *= B;
    vec.push_back(0);
    vec.push_back(x);
    for(int i = 1; i <= n; i++){
        if(r[i] - l[i] + 1 >= x){
            printf("%lld\n", x);
            return 0;
        }
        ll L = l[i], R = r[i];
        L %= x;
        R %= x;
        vec.push_back(L);
        vec.push_back(R + 1);
        if(L > R){
            seg.push_back(mp(L, x - 1));
            seg.push_back(mp(0, R));
        }
        else{
            seg.push_back(mp(L, R));
        }
    }
    sort(all(vec));
    vec.erase(unique(all(vec)), vec.end());
    for(auto v : seg){
        int ind1;
        int ind2;
        ind1 = lower_bound(all(vec), v.F) - vec.begin();
        ind2 = lower_bound(all(vec), v.S + 1) - vec.begin();
        val[ind1]++;
        val[ind2]--;
    }
    for(int i = 1; i < (int)vec.size(); i++){
        val[i] += val[i - 1];
    }
    for(int i = 0; i < (int)vec.size() - 1; i++){
        if(val[i]){
            ans += vec[i + 1] - vec[i];
        }
    }
    printf("%lld\n", ans);
}

Compilation message

strange_device.cpp:3: warning: ignoring #pragma comment  [-Wunknown-pragmas]
    3 | #pragma comment(linker, "/stack:200000000")
      | 
strange_device.cpp: In function 'int main()':
strange_device.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |     scanf("%d %lld %lld", &n, &A, &B);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |         scanf("%lld %lld", l + i, r + i);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 7 ms 1004 KB Output is correct
3 Correct 8 ms 1132 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 7 ms 1004 KB Output is correct
17 Correct 74 ms 5584 KB Output is correct
18 Correct 0 ms 364 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct
5 Correct 404 ms 47652 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 711 ms 51792 KB Output is correct
3 Correct 782 ms 51568 KB Output is correct
4 Correct 693 ms 51716 KB Output is correct

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 711 ms 51792 KB Output is correct
3 Correct 782 ms 51568 KB Output is correct
4 Correct 693 ms 51716 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 749 ms 51656 KB Output is correct
7 Correct 683 ms 51608 KB Output is correct
8 Correct 690 ms 51588 KB Output is correct
9 Incorrect 821 ms 51588 KB Output isn't correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 711 ms 51792 KB Output is correct
3 Correct 782 ms 51568 KB Output is correct
4 Correct 693 ms 51716 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 69 ms 5584 KB Output is correct
7 Correct 71 ms 5584 KB Output is correct
8 Correct 63 ms 5732 KB Output is correct
9 Correct 70 ms 5584 KB Output is correct
10 Correct 70 ms 5584 KB Output is correct
11 Correct 76 ms 5584 KB Output is correct
12 Correct 74 ms 5712 KB Output is correct
13 Correct 77 ms 5584 KB Output is correct
14 Correct 67 ms 5584 KB Output is correct
15 Correct 82 ms 5584 KB Output is correct
16 Correct 76 ms 5584 KB Output is correct
17 Correct 69 ms 5584 KB Output is correct
18 Correct 695 ms 51588 KB Output is correct
19 Correct 718 ms 51472 KB Output is correct
20 Incorrect 778 ms 51628 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 75 ms 5584 KB Output is correct
3 Correct 77 ms 5712 KB Output is correct
4 Incorrect 791 ms 51564 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 7 ms 1004 KB Output is correct
3 Correct 8 ms 1132 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 0 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 7 ms 1004 KB Output is correct
17 Correct 74 ms 5584 KB Output is correct
18 Correct 0 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 0 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 0 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 2 ms 364 KB Output is correct
28 Correct 404 ms 47652 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 711 ms 51792 KB Output is correct
31 Correct 782 ms 51568 KB Output is correct
32 Correct 693 ms 51716 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 749 ms 51656 KB Output is correct
35 Correct 683 ms 51608 KB Output is correct
36 Correct 690 ms 51588 KB Output is correct
37 Incorrect 821 ms 51588 KB Output isn't correct