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Submission #363990

# Submission time Handle Problem Language Result Execution time Memory
363990 2021-02-07T20:59:37 Z erfanmir Strange Device (APIO19_strange_device) C++17
25 / 100
 1187 ms 168596 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;
unordered_map<ll, int> um;

int main()
{
    um.max_load_factor(0.13);
    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(int i = 0; i < (int)vec.size(); i++){
        um[vec[i]] = i;
    }
    for(auto v : seg){
        int ind1;
        int ind2;
        ind1 = um[v.F];
        ind2 = um[v.S + 1];
        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:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   51 |     scanf("%d %lld %lld", &n, &A, &B);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |         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 8 ms 2508 KB Output is correct
3 Correct 9 ms 2636 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 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 0 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 8 ms 2508 KB Output is correct
17 Correct 97 ms 19496 KB Output is correct
18 Correct 1 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 0 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 620 KB Output is correct
3 Correct 1 ms 620 KB Output is correct
4 Correct 1 ms 620 KB Output is correct
5 Correct 421 ms 47544 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 779 ms 168352 KB Output is correct
3 Correct 1072 ms 168480 KB Output is correct
4 Correct 1080 ms 168416 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 779 ms 168352 KB Output is correct
3 Correct 1072 ms 168480 KB Output is correct
4 Correct 1080 ms 168416 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1014 ms 168352 KB Output is correct
7 Correct 763 ms 168480 KB Output is correct
8 Correct 1030 ms 168480 KB Output is correct
9 Incorrect 1187 ms 168500 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 779 ms 168352 KB Output is correct
3 Correct 1072 ms 168480 KB Output is correct
4 Correct 1080 ms 168416 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 77 ms 19452 KB Output is correct
7 Correct 83 ms 19452 KB Output is correct
8 Correct 84 ms 19580 KB Output is correct
9 Correct 101 ms 19452 KB Output is correct
10 Correct 80 ms 19452 KB Output is correct
11 Correct 100 ms 19584 KB Output is correct
12 Correct 99 ms 19580 KB Output is correct
13 Correct 106 ms 19580 KB Output is correct
14 Correct 80 ms 19708 KB Output is correct
15 Correct 107 ms 19580 KB Output is correct
16 Correct 99 ms 19452 KB Output is correct
17 Correct 95 ms 19452 KB Output is correct
18 Correct 831 ms 168440 KB Output is correct
19 Correct 1057 ms 168476 KB Output is correct
20 Incorrect 1140 ms 168596 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 85 ms 19452 KB Output is correct
3 Correct 103 ms 19452 KB Output is correct
4 Incorrect 1153 ms 168496 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 8 ms 2508 KB Output is correct
3 Correct 9 ms 2636 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 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 0 ms 364 KB Output is correct
14 Correct 0 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 8 ms 2508 KB Output is correct
17 Correct 97 ms 19496 KB Output is correct
18 Correct 1 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 0 ms 364 KB Output is correct
24 Correct 0 ms 364 KB Output is correct
25 Correct 1 ms 620 KB Output is correct
26 Correct 1 ms 620 KB Output is correct
27 Correct 1 ms 620 KB Output is correct
28 Correct 421 ms 47544 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 779 ms 168352 KB Output is correct
31 Correct 1072 ms 168480 KB Output is correct
32 Correct 1080 ms 168416 KB Output is correct
33 Correct 0 ms 364 KB Output is correct
34 Correct 1014 ms 168352 KB Output is correct
35 Correct 763 ms 168480 KB Output is correct
36 Correct 1030 ms 168480 KB Output is correct
37 Incorrect 1187 ms 168500 KB Output isn't correct