oj.uz

Submission #409652

# Submission time Handle Problem Language Result Execution time Memory
409652 2021-05-21T09:27:04 Z tempus Strange Device (APIO19_strange_device) C++17
0 / 100
 388 ms 15948 KB 
#include <bits/stdc++.h>

#define ll long long
#define endl "\n"
#define ios ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);

using namespace std;

int main() {
    ios
    int n;
    cin >> n;
    ll A, B;
    cin >> A >> B;
    ll S = 0;
    map <ll, ll> was;
    ll l[n], r[n], ans = 0;
    for (int i = 0; i < n; ++ i) {
        cin >> l[i] >> r[i];
        S += r[i] - l[i] + 1;
    }/*
    if (A > 1e18 / B + 1) {
        cout << S;
        return 0;
    }*/
    ll val = A * B / __gcd(B - 1, A);
    vector <pair <ll, ll> > v;
    for (int i = 0; i < n; ++ i) {
        if (l[i] + val >= r[i]) {
            cout << min(S, val);
            return 0;
        }
        ll ml = l[i] % val, mr = r[i] % val;
        if (ml <= mr) {
            v.push_back({ml, mr});
        }
        else {
            v.push_back({0, ml});
            v.push_back({mr, val - 1});
        }
    }
    sort(v.begin(), v.end());
    ans = v[0].second - v[0].first + 1;/*
    for (int i = 0; i < v.size(); ++ i) {
        cout << v[i].first << " " << v[i].second << endl;
    }*/
    for (int i = 1; i < v.size(); ++ i) {
        ll nl = v[i].first, nr = v[i].second;
        if (nl > v[i - 1].second) {
            ans += nr - nl + 1;
            continue;
        }
        else if (nr <= v[i - 1].second) {
            v[i].second = v[i - 1].second;
        }
        else {
            ans += nr - v[i - 1].second;
        }
    }
    cout << ans;
    return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:47:23: 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]
   47 |     for (int i = 1; i < v.size(); ++ i) {
      |                     ~~^~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 5 ms 460 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 1 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 388 ms 15948 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 388 ms 15948 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 388 ms 15948 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 43 ms 5572 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Incorrect 5 ms 460 KB Output isn't correct
3 Halted 0 ms 0 KB -