Submission #1044716

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1044716	2024-08-05T12:45:55 Z	vjudge1	Strange Device (APIO19_strange_device)	C++17	100 / 100	330 ms	31928 KB

strange_device

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30;


ll n, a, b;
vector<pair<ll, ll>> v;
void solve(){
  cin >> n >> a >> b;
  ll g = gcd(b+1, a);
  ll val = a / g;
  if(log2(val) + log2(b) > 60){
    ll tot = 0;
    for(int i = 1; i <= n; ++i){
      ll t1, t2; cin >> t1 >> t2;
      tot += t2 - t1 + 1;
    }
    cout << tot;
    return;
  }
  ll rep = b*val;
  ll ans = 0;
  for(int i = 1; i <= n; ++i){
    ll t1, t2; cin >> t1 >> t2;
    if(t1 + rep <= t2){
      ans = rep;
    }else{
      if(t2 % rep < t1 % rep){
        v.pb({0, t2 % rep});
        v.pb({t1 % rep, rep - 1});
      }else{
        v.pb({t1%rep, t2%rep});
      }
    }
  }
  if(ans == rep) cout << ans;
  else{
    sort(all(v));
    ll ans = rep;
    if(v.size() && v[0].ff > 0) ans -= v[0].ff;
    if(v.size() && v.back().ss < rep - 1) ans -= rep - v.back().ss - 1;
    ll mx = v[0].ss;
    for(int i = 1; i < v.size(); ++i){
      if(v[i].ff > mx) ans -= v[i].ff - mx - 1;
      mx = max(mx, v[i].ss);
    }
    // for(auto p: v) cout << p.ff << ' ' << p.ss << '\n';
    cout << ans;
  }
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
}

Compilation message

strange_device.cpp: In function 'void solve()':
strange_device.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     for(int i = 1; i < v.size(); ++i){
      |                    ~~^~~~~~~~~~
strange_device.cpp: In function 'int main()':
strange_device.cpp:64:15: warning: unused variable 'aa' [-Wunused-variable]
   64 |   int tt = 1, aa;
      |               ^~

Subtask #1
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	3 ms	736 KB	Output is correct
3	Correct	3 ms	708 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	3 ms	736 KB	Output is correct
17	Correct	25 ms	2520 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct

Subtask #2
5.0 / 5.0

#	Verdict	Memory	Grader output
1	Correct	344 KB	Output is correct
2	Correct	344 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct

Subtask #3
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	1 ms	488 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	155 ms	17984 KB	Output is correct

Subtask #4
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	245 ms	20140 KB	Output is correct
3	Correct	255 ms	30820 KB	Output is correct
4	Correct	309 ms	31144 KB	Output is correct

Subtask #5
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	245 ms	20140 KB	Output is correct
3	Correct	255 ms	30820 KB	Output is correct
4	Correct	309 ms	31144 KB	Output is correct
5	Correct	0 ms	344 KB	Output is correct
6	Correct	272 ms	31440 KB	Output is correct
7	Correct	218 ms	31216 KB	Output is correct
8	Correct	253 ms	30768 KB	Output is correct
9	Correct	294 ms	30944 KB	Output is correct

Subtask #6
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	245 ms	20140 KB	Output is correct
3	Correct	255 ms	30820 KB	Output is correct
4	Correct	309 ms	31144 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	23 ms	4012 KB	Output is correct
7	Correct	30 ms	4056 KB	Output is correct
8	Correct	24 ms	4172 KB	Output is correct
9	Correct	23 ms	4312 KB	Output is correct
10	Correct	27 ms	4056 KB	Output is correct
11	Correct	23 ms	4280 KB	Output is correct
12	Correct	24 ms	4056 KB	Output is correct
13	Correct	28 ms	4052 KB	Output is correct
14	Correct	21 ms	4040 KB	Output is correct
15	Correct	25 ms	4120 KB	Output is correct
16	Correct	43 ms	4056 KB	Output is correct
17	Correct	22 ms	4056 KB	Output is correct
18	Correct	311 ms	30700 KB	Output is correct
19	Correct	268 ms	30708 KB	Output is correct
20	Correct	236 ms	30744 KB	Output is correct
21	Correct	27 ms	4048 KB	Output is correct
22	Correct	37 ms	4048 KB	Output is correct
23	Correct	75 ms	14340 KB	Output is correct

Subtask #7
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	23 ms	2872 KB	Output is correct
3	Correct	41 ms	2528 KB	Output is correct
4	Correct	299 ms	30964 KB	Output is correct
5	Correct	24 ms	4048 KB	Output is correct
6	Correct	38 ms	4044 KB	Output is correct
7	Correct	27 ms	4052 KB	Output is correct
8	Correct	26 ms	4308 KB	Output is correct
9	Correct	25 ms	4056 KB	Output is correct
10	Correct	38 ms	4000 KB	Output is correct
11	Correct	24 ms	4004 KB	Output is correct
12	Correct	21 ms	3976 KB	Output is correct
13	Correct	30 ms	4128 KB	Output is correct
14	Correct	258 ms	31736 KB	Output is correct
15	Correct	38 ms	4184 KB	Output is correct
16	Correct	273 ms	30612 KB	Output is correct
17	Correct	236 ms	31676 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct

Subtask #8
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	3 ms	736 KB	Output is correct
3	Correct	3 ms	708 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	600 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	3 ms	736 KB	Output is correct
17	Correct	25 ms	2520 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	0 ms	344 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	0 ms	348 KB	Output is correct
25	Correct	1 ms	488 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	155 ms	17984 KB	Output is correct
29	Correct	0 ms	348 KB	Output is correct
30	Correct	245 ms	20140 KB	Output is correct
31	Correct	255 ms	30820 KB	Output is correct
32	Correct	309 ms	31144 KB	Output is correct
33	Correct	0 ms	344 KB	Output is correct
34	Correct	272 ms	31440 KB	Output is correct
35	Correct	218 ms	31216 KB	Output is correct
36	Correct	253 ms	30768 KB	Output is correct
37	Correct	294 ms	30944 KB	Output is correct
38	Correct	0 ms	348 KB	Output is correct
39	Correct	23 ms	4012 KB	Output is correct
40	Correct	30 ms	4056 KB	Output is correct
41	Correct	24 ms	4172 KB	Output is correct
42	Correct	23 ms	4312 KB	Output is correct
43	Correct	27 ms	4056 KB	Output is correct
44	Correct	23 ms	4280 KB	Output is correct
45	Correct	24 ms	4056 KB	Output is correct
46	Correct	28 ms	4052 KB	Output is correct
47	Correct	21 ms	4040 KB	Output is correct
48	Correct	25 ms	4120 KB	Output is correct
49	Correct	43 ms	4056 KB	Output is correct
50	Correct	22 ms	4056 KB	Output is correct
51	Correct	311 ms	30700 KB	Output is correct
52	Correct	268 ms	30708 KB	Output is correct
53	Correct	236 ms	30744 KB	Output is correct
54	Correct	27 ms	4048 KB	Output is correct
55	Correct	37 ms	4048 KB	Output is correct
56	Correct	75 ms	14340 KB	Output is correct
57	Correct	0 ms	348 KB	Output is correct
58	Correct	23 ms	2872 KB	Output is correct
59	Correct	41 ms	2528 KB	Output is correct
60	Correct	299 ms	30964 KB	Output is correct
61	Correct	24 ms	4048 KB	Output is correct
62	Correct	38 ms	4044 KB	Output is correct
63	Correct	27 ms	4052 KB	Output is correct
64	Correct	26 ms	4308 KB	Output is correct
65	Correct	25 ms	4056 KB	Output is correct
66	Correct	38 ms	4000 KB	Output is correct
67	Correct	24 ms	4004 KB	Output is correct
68	Correct	21 ms	3976 KB	Output is correct
69	Correct	30 ms	4128 KB	Output is correct
70	Correct	258 ms	31736 KB	Output is correct
71	Correct	38 ms	4184 KB	Output is correct
72	Correct	273 ms	30612 KB	Output is correct
73	Correct	236 ms	31676 KB	Output is correct
74	Correct	0 ms	348 KB	Output is correct
75	Correct	0 ms	348 KB	Output is correct
76	Correct	0 ms	348 KB	Output is correct
77	Correct	0 ms	348 KB	Output is correct
78	Correct	0 ms	348 KB	Output is correct
79	Correct	2 ms	1196 KB	Output is correct
80	Correct	270 ms	30936 KB	Output is correct
81	Correct	330 ms	31928 KB	Output is correct
82	Correct	267 ms	30900 KB	Output is correct
83	Correct	268 ms	30892 KB	Output is correct
84	Correct	318 ms	31412 KB	Output is correct
85	Correct	292 ms	31928 KB	Output is correct
86	Correct	75 ms	15036 KB	Output is correct
87	Correct	1 ms	344 KB	Output is correct