제출 #752885

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
752885		bgnbvnbv	The Kingdom of JOIOI (JOI17_joioi)	C++14	100 / 100	791 ms	63336 KiB

joioi

#include<bits/stdc++.h>
#define TASKNAME "codeforce"
#define pb push_back
#define pli pair<int,int>
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
using ll=long long;
const ll maxN=4e6+10;
const ll inf=1e18;
const ll mod=1e9+7;

ll n,m;
ll ans=inf;
ll a[2006][2006],b[2006][2006],mx=-inf,mn=inf;
bool check(ll mid)
{
    ll mxr=0;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            if(b[i][j]<mx-mid) mxr=max(mxr,1ll*j);
        }
        for(int j=1;j<=mxr;j++)
        {
            if(b[i][j]-mn>mid) return false;
        }
    }
    return true;
}
ll solve1()
{
    ll low=0,high=mx-mn-1;
    while(low<=high)
    {
        ll mid=low+high>>1;
        if(check(mid)) high=mid-1;
        else low=mid+1;
    }
    return low;
}
void rot()
{
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++)
        {
            b[m-j+1][i]=a[i][j];
        }
    }
    swap(m,n);
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++) a[i][j]=b[i][j];
    }
}
void solve()
{
    cin >> n >> m;
    for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=m;j++) cin >> a[i][j],b[i][j]=a[i][j],mx=max(mx,a[i][j]),mn=min(mn,a[i][j]);
    }
    ans=min(ans,solve1());
    rot();
    ans=min(ans,solve1());
    rot();
    ans=min(ans,solve1());
    rot();
    ans=min(ans,solve1());
    cout << ans;
}
int main()
{
    fastio
    //freopen(TASKNAME".INP","r",stdin);
    //freopen(TASKNAME".OUT","w",stdout);
    solve();
}

컴파일 시 표준 에러 (stderr) 메시지

joioi.cpp: In function 'll solve1()':
joioi.cpp:38:19: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |         ll mid=low+high>>1;
      |                ~~~^~~~~

• Subtask 1: 15 / 15
• Subtask 2: 45 / 45
• Subtask 3: 40 / 40