Submission #398445

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
398445	2021-05-04T09:54:11 Z	AKiko	Strange Device (APIO19_strange_device)	C++17	100 / 100	1954 ms	82608 KB

strange_device

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define ss second
#define ff first
#define pb push_back
#define pii pair<int, int>
#define INF INT64_MAX
#define debug(n) cout << #n << " = " << n << "\n";
#define FAST ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

using namespace std;

const ll MOD = 1e9 + 7;

int main() {
    ll n, A, B, T, K;
    cin >> n >> A >> B;
    K = A / __gcd(B + 1, A);
    if(INF / K / B > 0) {
        T = K * B;
    } else {
        T = INF;
    }
    map<ll, ll> m;
    for(int i = 0; i < n; i++) {
        ll l, r;
        cin >> l >> r;
        if(r - l + 1 >= T) {
            cout << T << "\n";
            return 0;
        }
        if(r % T < l % T) {
            m[0]++;
            m[r % T + 1]--;
            m[l % T]++;
            m[T]--;
        } else {
            m[l % T]++;
            m[r % T + 1]--;
        }
    }
    ll prev = 0;
    vector<pair<ll, ll> > segments;
    for(auto el : m) {
        prev += el.ss;
        segments.pb({el.ff, prev});
    }

    ll ans = 0;
    for(int i = 0; i < int(segments.size() - 1); i++) {
        if(segments[i].ss > 0){
            ans += segments[i + 1].ff - segments[i].ff;
        }
    }

    cout << ans << "\n";

    return 0;
}

/* stuff you should look for
    * int overflow, array bounds
    * special cases (n=1?)
    * do smth instead of nothing and stay organized
    * WRITE STUFF DOWN
    * DON'T GET STUCK ON ONE APPROACH
*/

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	17 ms	1264 KB	Output is correct
3	Correct	17 ms	1300 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	18 ms	1332 KB	Output is correct
17	Correct	205 ms	8704 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct

Subtask #2
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct

Subtask #3
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	3 ms	332 KB	Output is correct
3	Correct	2 ms	332 KB	Output is correct
4	Correct	3 ms	332 KB	Output is correct
5	Correct	1052 ms	272 KB	Output is correct

Subtask #4
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1828 ms	79492 KB	Output is correct
3	Correct	1840 ms	79476 KB	Output is correct
4	Correct	1860 ms	79568 KB	Output is correct

Subtask #5
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1828 ms	79492 KB	Output is correct
3	Correct	1840 ms	79476 KB	Output is correct
4	Correct	1860 ms	79568 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1850 ms	79448 KB	Output is correct
7	Correct	1874 ms	79432 KB	Output is correct
8	Correct	1814 ms	79520 KB	Output is correct
9	Correct	1898 ms	81388 KB	Output is correct

Subtask #6
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1828 ms	79492 KB	Output is correct
3	Correct	1840 ms	79476 KB	Output is correct
4	Correct	1860 ms	79568 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	175 ms	8760 KB	Output is correct
7	Correct	171 ms	8728 KB	Output is correct
8	Correct	175 ms	8744 KB	Output is correct
9	Correct	177 ms	8688 KB	Output is correct
10	Correct	174 ms	8636 KB	Output is correct
11	Correct	177 ms	8756 KB	Output is correct
12	Correct	183 ms	8656 KB	Output is correct
13	Correct	181 ms	8720 KB	Output is correct
14	Correct	179 ms	8696 KB	Output is correct
15	Correct	186 ms	8712 KB	Output is correct
16	Correct	204 ms	8688 KB	Output is correct
17	Correct	198 ms	8744 KB	Output is correct
18	Correct	1839 ms	82608 KB	Output is correct
19	Correct	1873 ms	82540 KB	Output is correct
20	Correct	1879 ms	81456 KB	Output is correct
21	Correct	178 ms	8732 KB	Output is correct
22	Correct	181 ms	8640 KB	Output is correct
23	Correct	464 ms	204 KB	Output is correct

Subtask #7
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	179 ms	8748 KB	Output is correct
3	Correct	194 ms	8652 KB	Output is correct
4	Correct	1878 ms	79468 KB	Output is correct
5	Correct	177 ms	8632 KB	Output is correct
6	Correct	182 ms	8712 KB	Output is correct
7	Correct	178 ms	8632 KB	Output is correct
8	Correct	179 ms	8724 KB	Output is correct
9	Correct	177 ms	8752 KB	Output is correct
10	Correct	186 ms	8700 KB	Output is correct
11	Correct	175 ms	8720 KB	Output is correct
12	Correct	178 ms	8616 KB	Output is correct
13	Correct	187 ms	8648 KB	Output is correct
14	Correct	1899 ms	81280 KB	Output is correct
15	Correct	176 ms	8688 KB	Output is correct
16	Correct	1835 ms	79468 KB	Output is correct
17	Correct	1798 ms	79568 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct

Subtask #8
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	17 ms	1264 KB	Output is correct
3	Correct	17 ms	1300 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	18 ms	1332 KB	Output is correct
17	Correct	205 ms	8704 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	3 ms	332 KB	Output is correct
26	Correct	2 ms	332 KB	Output is correct
27	Correct	3 ms	332 KB	Output is correct
28	Correct	1052 ms	272 KB	Output is correct
29	Correct	1 ms	204 KB	Output is correct
30	Correct	1828 ms	79492 KB	Output is correct
31	Correct	1840 ms	79476 KB	Output is correct
32	Correct	1860 ms	79568 KB	Output is correct
33	Correct	1 ms	204 KB	Output is correct
34	Correct	1850 ms	79448 KB	Output is correct
35	Correct	1874 ms	79432 KB	Output is correct
36	Correct	1814 ms	79520 KB	Output is correct
37	Correct	1898 ms	81388 KB	Output is correct
38	Correct	1 ms	204 KB	Output is correct
39	Correct	175 ms	8760 KB	Output is correct
40	Correct	171 ms	8728 KB	Output is correct
41	Correct	175 ms	8744 KB	Output is correct
42	Correct	177 ms	8688 KB	Output is correct
43	Correct	174 ms	8636 KB	Output is correct
44	Correct	177 ms	8756 KB	Output is correct
45	Correct	183 ms	8656 KB	Output is correct
46	Correct	181 ms	8720 KB	Output is correct
47	Correct	179 ms	8696 KB	Output is correct
48	Correct	186 ms	8712 KB	Output is correct
49	Correct	204 ms	8688 KB	Output is correct
50	Correct	198 ms	8744 KB	Output is correct
51	Correct	1839 ms	82608 KB	Output is correct
52	Correct	1873 ms	82540 KB	Output is correct
53	Correct	1879 ms	81456 KB	Output is correct
54	Correct	178 ms	8732 KB	Output is correct
55	Correct	181 ms	8640 KB	Output is correct
56	Correct	464 ms	204 KB	Output is correct
57	Correct	1 ms	204 KB	Output is correct
58	Correct	179 ms	8748 KB	Output is correct
59	Correct	194 ms	8652 KB	Output is correct
60	Correct	1878 ms	79468 KB	Output is correct
61	Correct	177 ms	8632 KB	Output is correct
62	Correct	182 ms	8712 KB	Output is correct
63	Correct	178 ms	8632 KB	Output is correct
64	Correct	179 ms	8724 KB	Output is correct
65	Correct	177 ms	8752 KB	Output is correct
66	Correct	186 ms	8700 KB	Output is correct
67	Correct	175 ms	8720 KB	Output is correct
68	Correct	178 ms	8616 KB	Output is correct
69	Correct	187 ms	8648 KB	Output is correct
70	Correct	1899 ms	81280 KB	Output is correct
71	Correct	176 ms	8688 KB	Output is correct
72	Correct	1835 ms	79468 KB	Output is correct
73	Correct	1798 ms	79568 KB	Output is correct
74	Correct	1 ms	204 KB	Output is correct
75	Correct	1 ms	204 KB	Output is correct
76	Correct	1 ms	204 KB	Output is correct
77	Correct	1 ms	204 KB	Output is correct
78	Correct	1 ms	204 KB	Output is correct
79	Correct	17 ms	1264 KB	Output is correct
80	Correct	1876 ms	79356 KB	Output is correct
81	Correct	1836 ms	79452 KB	Output is correct
82	Correct	1873 ms	79444 KB	Output is correct
83	Correct	1880 ms	79400 KB	Output is correct
84	Correct	1954 ms	79692 KB	Output is correct
85	Correct	1946 ms	79440 KB	Output is correct
86	Correct	471 ms	204 KB	Output is correct
87	Correct	1 ms	204 KB	Output is correct

Submission #398445

Compilation message