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Submission #284541

# Submission time Handle Problem Language Result Execution time Memory
284541 2020-08-27T15:31:55 Z AaronNaidu Strange Device (APIO19_strange_device) C++14
100 / 100
 3895 ms 76844 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;

ll n, a, b, l, r, per;
set<pair<ll, ll> > segments, newSegments;

ll gcd(ll x, ll y) {
    //cout << "GCD of " << x << " " << y << "\n";
    if (y == 0)
    {
        return x;
    }
    return gcd(y, x % y);
}

void addSegment(ll sta, ll fin) {
    //newSegments = segments;
    auto startPos = segments.upper_bound({sta, per});
    vector<pair<ll, ll>> toErase;
    if (startPos == segments.begin())
    {
        for (auto i = segments.begin(); i != segments.end(); i++)
        {
            if (i->first <= fin)
            {
                fin = max(fin, i->second);
                toErase.push_back({i->first, i->second});
            }
            else
            {
                break;
            }
        }
        for (int i = 0; i < toErase.size(); i++)
        {
            segments.erase({toErase[i].first, toErase[i].second});
        }
        segments.insert({sta, fin});
        return;
    }
    startPos--;
    if (startPos->second >= sta)
    {
        sta = min(sta, startPos->first);
        fin = max(fin, startPos->second);
        toErase.push_back({startPos->first, startPos->second});
    }
    startPos++;  
    for (auto i = startPos; i != segments.end(); i++)
    {
        if (i->first <= fin)
        {
            fin = max(fin, i->second);
            toErase.push_back({i->first, i->second});
        }
        else
        {
            break;
        }
    }
    for (int i = 0; i < toErase.size(); i++)
    {
        segments.erase({toErase[i].first, toErase[i].second});
    }
    segments.insert({sta, fin});     
}

int main() {
    cin >> n >> a >> b;
    //segments.insert({0, 1});
    //segments.insert({1000000000000000000, 0});
    per = gcd(a, b+1);
    ld A = a;
    ld B = b;
    ld t = A/(1000000000000000007) * B;
    if (t > per)
    {
        per = 1000000000000000007;
    }
    else
    {
        per = round(A/per * B);
    }
    cin >> l >> r;
    if (r-l+1 >= per)
    {
        cout << per << "\n";
        return 0;
    }
    l = l%per;
    r = r%per;
    if(l <= r) {
        segments.insert({l, r});
        //segments.push_back({r, 1});
    }
    else
    {
        segments.insert({0, r});
        //segments.push_back({r, 1});
        segments.insert({l, per-1});
        //segments.push_back({per-1, 1});
    }
    for (int i = 1; i < n; i++)
    {
        cin >> l >> r;
        if (r-l+1 >= per)
        {
        cout << per << "\n";
        return 0;
        }
        l = l%per;
        r = r%per;
        if (l <= r)
        {
            addSegment(l, r);
        }
        else
        {
            addSegment(0, r);
            addSegment(l, per-1);
        }
    }
    ll runningTotal = 0;
    for (auto i : segments)
    {
        runningTotal += i.second - i.first + 1;
    }
    cout << runningTotal << "\n";
}

Compilation message

strange_device.cpp: In function 'void addSegment(ll, ll)':
strange_device.cpp:36:27: 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]
   36 |         for (int i = 0; i < toErase.size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~
strange_device.cpp:63:23: 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]
   63 |     for (int i = 0; i < toErase.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 33 ms 1272 KB Output is correct
3 Correct 35 ms 1272 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 37 ms 1272 KB Output is correct
17 Correct 348 ms 10232 KB Output is correct
18 Correct 1 ms 256 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 288 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 368 KB Output is correct
5 Correct 0 ms 256 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 2227 ms 25576 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 3472 ms 76644 KB Output is correct
3 Correct 3457 ms 76524 KB Output is correct
4 Correct 3575 ms 76476 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 3472 ms 76644 KB Output is correct
3 Correct 3457 ms 76524 KB Output is correct
4 Correct 3575 ms 76476 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 3458 ms 76404 KB Output is correct
7 Correct 3445 ms 76844 KB Output is correct
8 Correct 3566 ms 76340 KB Output is correct
9 Correct 3495 ms 76456 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 3472 ms 76644 KB Output is correct
3 Correct 3457 ms 76524 KB Output is correct
4 Correct 3575 ms 76476 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 398 ms 10360 KB Output is correct
7 Correct 334 ms 10232 KB Output is correct
8 Correct 331 ms 10232 KB Output is correct
9 Correct 348 ms 10232 KB Output is correct
10 Correct 344 ms 10268 KB Output is correct
11 Correct 344 ms 10284 KB Output is correct
12 Correct 344 ms 10232 KB Output is correct
13 Correct 367 ms 10360 KB Output is correct
14 Correct 336 ms 10232 KB Output is correct
15 Correct 341 ms 10360 KB Output is correct
16 Correct 341 ms 10232 KB Output is correct
17 Correct 338 ms 10232 KB Output is correct
18 Correct 3396 ms 76556 KB Output is correct
19 Correct 3421 ms 76408 KB Output is correct
20 Correct 3564 ms 76676 KB Output is correct
21 Correct 351 ms 10232 KB Output is correct
22 Correct 347 ms 10232 KB Output is correct
23 Correct 1048 ms 13048 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 355 ms 10232 KB Output is correct
3 Correct 340 ms 10360 KB Output is correct
4 Correct 3489 ms 76320 KB Output is correct
5 Correct 362 ms 10364 KB Output is correct
6 Correct 368 ms 10488 KB Output is correct
7 Correct 351 ms 10372 KB Output is correct
8 Correct 345 ms 10424 KB Output is correct
9 Correct 367 ms 10308 KB Output is correct
10 Correct 358 ms 10360 KB Output is correct
11 Correct 339 ms 10232 KB Output is correct
12 Correct 342 ms 10232 KB Output is correct
13 Correct 343 ms 10308 KB Output is correct
14 Correct 3895 ms 76536 KB Output is correct
15 Correct 346 ms 9592 KB Output is correct
16 Correct 3472 ms 76408 KB Output is correct
17 Correct 3468 ms 76432 KB Output is correct
18 Correct 1 ms 256 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 33 ms 1272 KB Output is correct
3 Correct 35 ms 1272 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 37 ms 1272 KB Output is correct
17 Correct 348 ms 10232 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 288 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 0 ms 256 KB Output is correct
22 Correct 0 ms 368 KB Output is correct
23 Correct 0 ms 256 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 4 ms 384 KB Output is correct
26 Correct 4 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 2227 ms 25576 KB Output is correct
29 Correct 1 ms 256 KB Output is correct
30 Correct 3472 ms 76644 KB Output is correct
31 Correct 3457 ms 76524 KB Output is correct
32 Correct 3575 ms 76476 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 3458 ms 76404 KB Output is correct
35 Correct 3445 ms 76844 KB Output is correct
36 Correct 3566 ms 76340 KB Output is correct
37 Correct 3495 ms 76456 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 398 ms 10360 KB Output is correct
40 Correct 334 ms 10232 KB Output is correct
41 Correct 331 ms 10232 KB Output is correct
42 Correct 348 ms 10232 KB Output is correct
43 Correct 344 ms 10268 KB Output is correct
44 Correct 344 ms 10284 KB Output is correct
45 Correct 344 ms 10232 KB Output is correct
46 Correct 367 ms 10360 KB Output is correct
47 Correct 336 ms 10232 KB Output is correct
48 Correct 341 ms 10360 KB Output is correct
49 Correct 341 ms 10232 KB Output is correct
50 Correct 338 ms 10232 KB Output is correct
51 Correct 3396 ms 76556 KB Output is correct
52 Correct 3421 ms 76408 KB Output is correct
53 Correct 3564 ms 76676 KB Output is correct
54 Correct 351 ms 10232 KB Output is correct
55 Correct 347 ms 10232 KB Output is correct
56 Correct 1048 ms 13048 KB Output is correct
57 Correct 1 ms 256 KB Output is correct
58 Correct 355 ms 10232 KB Output is correct
59 Correct 340 ms 10360 KB Output is correct
60 Correct 3489 ms 76320 KB Output is correct
61 Correct 362 ms 10364 KB Output is correct
62 Correct 368 ms 10488 KB Output is correct
63 Correct 351 ms 10372 KB Output is correct
64 Correct 345 ms 10424 KB Output is correct
65 Correct 367 ms 10308 KB Output is correct
66 Correct 358 ms 10360 KB Output is correct
67 Correct 339 ms 10232 KB Output is correct
68 Correct 342 ms 10232 KB Output is correct
69 Correct 343 ms 10308 KB Output is correct
70 Correct 3895 ms 76536 KB Output is correct
71 Correct 346 ms 9592 KB Output is correct
72 Correct 3472 ms 76408 KB Output is correct
73 Correct 3468 ms 76432 KB Output is correct
74 Correct 1 ms 256 KB Output is correct
75 Correct 1 ms 256 KB Output is correct
76 Correct 1 ms 256 KB Output is correct
77 Correct 1 ms 256 KB Output is correct
78 Correct 1 ms 256 KB Output is correct
79 Correct 35 ms 1272 KB Output is correct
80 Correct 3506 ms 76424 KB Output is correct
81 Correct 3461 ms 76596 KB Output is correct
82 Correct 3563 ms 76452 KB Output is correct
83 Correct 3528 ms 76632 KB Output is correct
84 Correct 3585 ms 76472 KB Output is correct
85 Correct 3536 ms 76332 KB Output is correct
86 Correct 1051 ms 13036 KB Output is correct
87 Correct 1 ms 256 KB Output is correct