제출 #322572

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
322572		arbor	이상한 기계 (APIO19_strange_device)	C++14	100 / 100	629 ms	53572 KiB

strange_device

#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MN = 1e5 + 5;
using ull = unsigned long long;

int main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    ull n, a, b; cin >> n >> a >> b;
    ull p = a / __gcd(a, b + 1) * b;
    vector<pair<ull, ull>> v;
    for (int i = 0; i < n; i++) {
        ull l, r; cin >> l >> r;
        if (r - l + 1 >= p) {
            cout << p;
            return 0;
        }
        l %= p, r %= p;
        if (l > r) v.emplace_back(0, r), v.emplace_back(l, p - 1);
        else v.emplace_back(l, r);
    }
    v.emplace_back(p, p);
    sort(all(v));
    ull ans = 0;
    for (int i = 0; i < v.size();) {
        int j = i;
        for (; v[i].second >= v[j].second && j < v.size(); j++);
        ans += v[i].second - v[i].first + 1;
        v[j].first = max(v[j].first, v[i].second + 1);
        i = j;
    }
    cout << ans - 1 << '\n';
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

strange_device.cpp: In function 'int main()':
strange_device.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'ull' {aka 'long long unsigned int'} [-Wsign-compare]
   14 |     for (int i = 0; i < n; i++) {
      |                     ~~^~~
strange_device.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long unsigned int, long long unsigned int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for (int i = 0; i < v.size();) {
      |                     ~~^~~~~~~~~~
strange_device.cpp:29:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long unsigned int, long long unsigned int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for (; v[i].second >= v[j].second && j < v.size(); j++);
      |                                              ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20
• Subtask 8: 30 / 30