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Submission #382548

# Submission time Handle Problem Language Result Execution time Memory
382548 2021-03-27T16:09:28 Z talant117408 Strange Device (APIO19_strange_device) C++17
100 / 100
 543 ms 42716 KB 
/*
    Code written by Talant I.D.
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace __gnu_pbds;
using namespace std;

typedef long long ll;
typedef long double bigInt;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
typedef tree <pii, null_type, less <pii>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;

const int mod = 1e9+7;

ll mode(ll a) {
    a %= mod;
    if (a < 0) a += mod;
    return a;
}

ll subt(ll a, ll b) {
    return mode(mode(a)-mode(b));
}

ll add(ll a, ll b) {
    return mode(mode(a)+mode(b));
}

ll mult(ll a, ll b) {
    return mode(mode(a)*mode(b));
}

ll binpow(ll a, ll b) {
    ll res = 1;
    while (b) {
        if (b&1) res = mult(res, a);
        a = mult(a, a);
        b >>= 1;
    }
    return res;
}

void usaco(string s) {
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

ll n, a, b;

ll A(ll x) {
    return (x+x/b)%a;
}

ll B(ll x) {
    return x%b;
}

bool check(bigInt a, bigInt b) {
    return a*b > ll(1e18);
}

int main() {
    do_not_disturb
    //~ usaco("dirtraverse");
    
    cin >> n >> a >> b;
    vector <pll> v(n), segs;
    for (auto &to : v) cin >> to.first >> to.second;
    a = a/__gcd(a, b+1);
    ll t = (check(a, b) ? (ll)1e18 : a*b);
    bool flag = 0;
    for (auto to : v) {
        if (to.first/t == to.second/t) {
            segs.pb(mp(to.first%t, to.second%t));
        }
        else if (to.first/t+1 == to.second/t) {
            segs.pb(mp(to.first%t, t-1));
            segs.pb(mp(0, to.second%t));
        }
        else {
            flag = 1;
        }
    }
    if (flag) cout << t << endl;
    else {
        ll ans = 0;
        sort(all(segs));
        for (int i = 0, j = 0; i < sz(segs); i = j) {
            auto l = segs[i].first, r = segs[i].second;
            for ( ; j < sz(segs) && segs[j].first <= r; j++) {
                r = max(r, segs[j].second);
            }
            ans += r-l+1;
        }
        cout << ans << endl;
    }
    
    return 0;
}

Compilation message

strange_device.cpp: In function 'void usaco(std::string)':
strange_device.cpp:61:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   61 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
strange_device.cpp:62:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   62 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 5 ms 876 KB Output is correct
3 Correct 6 ms 876 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 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 5 ms 876 KB Output is correct
17 Correct 50 ms 4200 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 1 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 1 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 1 ms 364 KB Output is correct
5 Correct 338 ms 34048 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 463 ms 40552 KB Output is correct
3 Correct 469 ms 32604 KB Output is correct
4 Correct 446 ms 32728 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 463 ms 40552 KB Output is correct
3 Correct 469 ms 32604 KB Output is correct
4 Correct 446 ms 32728 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 456 ms 32544 KB Output is correct
7 Correct 457 ms 32604 KB Output is correct
8 Correct 455 ms 34780 KB Output is correct
9 Correct 492 ms 37084 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 463 ms 40552 KB Output is correct
3 Correct 469 ms 32604 KB Output is correct
4 Correct 446 ms 32728 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 46 ms 6888 KB Output is correct
7 Correct 51 ms 6760 KB Output is correct
8 Correct 47 ms 7784 KB Output is correct
9 Correct 49 ms 7912 KB Output is correct
10 Correct 49 ms 6376 KB Output is correct
11 Correct 48 ms 7784 KB Output is correct
12 Correct 47 ms 7528 KB Output is correct
13 Correct 49 ms 7784 KB Output is correct
14 Correct 47 ms 7784 KB Output is correct
15 Correct 52 ms 7784 KB Output is correct
16 Correct 50 ms 7784 KB Output is correct
17 Correct 52 ms 7912 KB Output is correct
18 Correct 469 ms 42716 KB Output is correct
19 Correct 456 ms 42716 KB Output is correct
20 Correct 516 ms 42716 KB Output is correct
21 Correct 51 ms 7912 KB Output is correct
22 Correct 45 ms 7784 KB Output is correct
23 Correct 148 ms 26592 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 48 ms 4072 KB Output is correct
3 Correct 50 ms 7784 KB Output is correct
4 Correct 539 ms 42076 KB Output is correct
5 Correct 51 ms 7912 KB Output is correct
6 Correct 50 ms 7784 KB Output is correct
7 Correct 52 ms 7784 KB Output is correct
8 Correct 50 ms 7784 KB Output is correct
9 Correct 50 ms 7784 KB Output is correct
10 Correct 50 ms 7912 KB Output is correct
11 Correct 52 ms 7912 KB Output is correct
12 Correct 44 ms 7784 KB Output is correct
13 Correct 49 ms 7784 KB Output is correct
14 Correct 497 ms 41436 KB Output is correct
15 Correct 48 ms 7784 KB Output is correct
16 Correct 459 ms 40028 KB Output is correct
17 Correct 449 ms 38288 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 5 ms 876 KB Output is correct
3 Correct 6 ms 876 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 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 5 ms 876 KB Output is correct
17 Correct 50 ms 4200 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 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 1 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 1 ms 364 KB Output is correct
28 Correct 338 ms 34048 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 463 ms 40552 KB Output is correct
31 Correct 469 ms 32604 KB Output is correct
32 Correct 446 ms 32728 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 456 ms 32544 KB Output is correct
35 Correct 457 ms 32604 KB Output is correct
36 Correct 455 ms 34780 KB Output is correct
37 Correct 492 ms 37084 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 46 ms 6888 KB Output is correct
40 Correct 51 ms 6760 KB Output is correct
41 Correct 47 ms 7784 KB Output is correct
42 Correct 49 ms 7912 KB Output is correct
43 Correct 49 ms 6376 KB Output is correct
44 Correct 48 ms 7784 KB Output is correct
45 Correct 47 ms 7528 KB Output is correct
46 Correct 49 ms 7784 KB Output is correct
47 Correct 47 ms 7784 KB Output is correct
48 Correct 52 ms 7784 KB Output is correct
49 Correct 50 ms 7784 KB Output is correct
50 Correct 52 ms 7912 KB Output is correct
51 Correct 469 ms 42716 KB Output is correct
52 Correct 456 ms 42716 KB Output is correct
53 Correct 516 ms 42716 KB Output is correct
54 Correct 51 ms 7912 KB Output is correct
55 Correct 45 ms 7784 KB Output is correct
56 Correct 148 ms 26592 KB Output is correct
57 Correct 1 ms 364 KB Output is correct
58 Correct 48 ms 4072 KB Output is correct
59 Correct 50 ms 7784 KB Output is correct
60 Correct 539 ms 42076 KB Output is correct
61 Correct 51 ms 7912 KB Output is correct
62 Correct 50 ms 7784 KB Output is correct
63 Correct 52 ms 7784 KB Output is correct
64 Correct 50 ms 7784 KB Output is correct
65 Correct 50 ms 7784 KB Output is correct
66 Correct 50 ms 7912 KB Output is correct
67 Correct 52 ms 7912 KB Output is correct
68 Correct 44 ms 7784 KB Output is correct
69 Correct 49 ms 7784 KB Output is correct
70 Correct 497 ms 41436 KB Output is correct
71 Correct 48 ms 7784 KB Output is correct
72 Correct 459 ms 40028 KB Output is correct
73 Correct 449 ms 38288 KB Output is correct
74 Correct 1 ms 364 KB Output is correct
75 Correct 1 ms 364 KB Output is correct
76 Correct 1 ms 364 KB Output is correct
77 Correct 1 ms 364 KB Output is correct
78 Correct 1 ms 364 KB Output is correct
79 Correct 6 ms 1132 KB Output is correct
80 Correct 543 ms 36568 KB Output is correct
81 Correct 527 ms 35164 KB Output is correct
82 Correct 503 ms 33376 KB Output is correct
83 Correct 495 ms 33372 KB Output is correct
84 Correct 491 ms 32680 KB Output is correct
85 Correct 488 ms 35292 KB Output is correct
86 Correct 147 ms 15968 KB Output is correct
87 Correct 1 ms 364 KB Output is correct