Submission #401379

#	Time	Username	Problem	Language	Result	Execution time	Memory
401379		ZikXewen	Strange Device (APIO19_strange_device)	C++17	0 / 100	1 ms	204 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
typedef long long int64;
typedef pair<int64, int64> ii;
int N;
int64 A, B, per, ans;
vector<ii> ar;
int main(){
    ios::sync_with_stdio(0), cin.tie(0);
    cin >> N >> A >> B;
    if(A / __gcd(A, B + 1) >= LLONG_MAX / B) per = LLONG_MAX;
    per = A / __gcd(A, B + 1) * B;
    cout << per << '\n';
    for(int64 i = 0, u, v; i < N; ++i){
        cin >> u >> v;
        if(v - u + 1 >= per) {cout << per; return 0;}
        u %= per, v %= per;
        if(u <= v) ar.emplace_back(u, v);
        else ar.emplace_back(u, per - 1), ar.emplace_back(0, v);
    }
    sort(ar.begin(), ar.end());
    for(auto [u, v]: ar) cout << u << ' ' << v << '\n';
    for(int64 i = 0, l = 0, r = -1;; ++i){
        if(i == ar.size()) {ans += r - l + 1; break;}
        if(ar[i].first <= r) r = max(r, ar[i].second);
        else ans += r - l + 1, l = ar[i].first, r = ar[i].second;
    }
    cout << ans;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:24:14: warning: comparison of integer expressions of different signedness: 'int64' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if(i == ar.size()) {ans += r - l + 1; break;}
      |            ~~^~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30