제출 #819402

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
819402		Alihan_8	기지국 (IOI20_stations)	C++17	0 / 100	682 ms	544 KiB

stations

#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define pb push_back
#define ln '\n'
//#define int long long

template <class _T>
bool chmin(_T &x, const _T &y){
    bool flag = false;
    if ( x > y ){
        x = y; flag |= true;
    }
    return flag;
}

template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag = false;
    if ( x < y ){
        x = y; flag |= true;
    }
    return flag;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    vector <int> ans(n);
    for ( int i = 0; i < n; i++ ){
        ans[i] = i;
    }
    return ans;
}

int find_next_station(int s, int t, vector<int> c) {
    int bck = -1;
    auto in = [&](int s, int t){
        int x = __lg(s), y = __lg(t);
        if ( x >= y ){
            return false;
        }
        if ( s % 2 == 0 ){
            if ( (s + 1) * (1ll << y - x) <= t ){
                return false;
            }
            if ( (s * 2 + 1) * (1ll << y - x - 1) <= t ){
                bck = s * 2 + 1;
            } else bck = s * 2;
            return true;
        } else{
            if ( s * (1ll << y - x) > t ){
                return false;
            }
            if ( (s * 2 + 1) * (1ll << y - x - 1) <= t ){
                bck = s * 2 + 1;
            } else bck = s * 2;
            return true;
        }
    };
    return in(s + 1, t + 1) ? bck - 1 : (s - 1) / 2;
}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In lambda function:
stations.cpp:44:38: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   44 |             if ( (s + 1) * (1ll << y - x) <= t ){
      |                                    ~~^~~
stations.cpp:47:46: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   47 |             if ( (s * 2 + 1) * (1ll << y - x - 1) <= t ){
      |                                        ~~~~~~^~~
stations.cpp:52:32: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   52 |             if ( s * (1ll << y - x) > t ){
      |                              ~~^~~
stations.cpp:55:46: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   55 |             if ( (s * 2 + 1) * (1ll << y - x - 1) <= t ){
      |                                        ~~~~~~^~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61