제출 #1020401

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1020401		cpptowin	Self Study (JOI22_ho_t2)	C++17	100 / 100	123 ms	14524 KiB

Main

#include<bits/stdc++.h>
#define fo(i,l,r) for(int i = l; i <= r; i++)
#define fod(i,r,l) for(int i = r ; i >= l; i--)
#define int long long
#define maxn 1000010
#define N 1010
#define inf (int)3e18
#define pb emplace_back
#define all(x) x.begin(),x.end()
#define en cout << "\n";
#define ss(x) (int)x.size()
#define bitcount(x) __builtint_popcountll(x)
#define bit(x,i) ((x >> i) & 1)
#define onbit(x,i) (x | (1ll << i))
#define offbit(x,i) (x ^ (1ll << i))
#define lb(x) x & -x
#define pii pair<int,int>
#define vi vector<int>
#define vii vector<pii>
#define fi first
#define se second
bool maximize(int &a,int b)
{
    if(a <= b)
    {
        a = b;
        return 1;
    }
    return 0;
}
bool minimize(int &a,int b)
{
    if(a >= b)
    {
        a = b;
        return 1;
    }
    return 0;
}
using namespace std;
int n,m;
int a[maxn],b[maxn];
namespace sub3
{
    bool check(int x)
    {
        int r = 0;
        fo(i,1,n)
        {
            int val = x / a[i] + (x % a[i] > 0);
            if(val <= m) r += m - val;
            else
            {
                int cc = x - m * a[i];
                cc = cc / b[i] + (cc % b[i] > 0);
                r -= cc;
                if(r < -1e18) return 0;
            }
        }
        return r >= 0;
    }
    void solve()
    {
        fo(i,1,n) a[i] = max(a[i],b[i]);
        int l = 0,r = inf,ans = 0;
        while(l <= r)
        {
            int mid = l + r >> 1;
            if(check(mid)) ans = mid,l = mid + 1;
            else r = mid - 1;
        }
        cout << ans;
    }
}
main()
{
    #define name "TASK"
    if(fopen(name".inp","r"))
    {
        freopen(name".inp","r",stdin);
        freopen(name".out","w",stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    fo(i,1,n) cin >> a[i];
    fo(i,1,n) cin >> b[i];
    sub3::solve();
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void sub3::solve()':
Main.cpp:68:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   68 |             int mid = l + r >> 1;
      |                       ~~^~~
Main.cpp: At global scope:
Main.cpp:75:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   75 | main()
      | ^~~~
Main.cpp: In function 'int main()':
Main.cpp:80:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |         freopen(name".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:81:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   81 |         freopen(name".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9