Submission #915477

#	Time	Username	Problem	Language	Result	Execution time	Memory
915477		HorizonWest	Snowball (JOI21_ho_t2)	C++17	100 / 100	109 ms	13896 KiB

Main

#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define db double
#define ll __int128
#define int long long
#define pb push_back
#define fs first
#define sd second
#define Mod long(1e9 + 7)
#define all(x) x.begin(), x.end()
#define unvisited long(-1)
#define Eps double(1e-9)
#define _for(i, n) for(int i = 0; i < (n); i++)
#define dbg(x) cout << #x ": " << x << endl;

const int Max = 1e6 + 7, Inf = 1e18 + 7;

void print(bool x) { cout << (x ? "YES" : "NO") << endl; }

string tostring (__int128 x)
{
    string ans = "";
    while(x > 0)
    {
        ans += (x % 10 + '0');
        x /= 10;
    }
    reverse(all(ans));
    return ans;
}

void solve()
{
    int n, q; cin >> n >> q; 
    vector <int> v(n); 
    for(auto& u : v) cin >> u;

    vector <int> s(q), mx(q), mn(q); 
    for(int i = 0; i < q; i++)
    {
        cin >> s[i]; 
        if(i != 0)
        {
            s[i] += s[i-1];
            mn[i] = min(s[i], mn[i-1]);
            mx[i] = max(s[i], mx[i-1]);
        }
        else 
        {        
            mn[i] = mx[i] = s[i];
        }
    }

    for(int i = 0; i < n; i++)
    {
        int a = -1, b = q, ans = 0, x, y;

        x = v[i]; y = (i+1 != n ? v[i+1] : Inf);
        while(abs(a - b) != 1)
        {
            int c = (a + b) / 2; 

            if(mx[c] + x < mn[c] + y)
                a = c; 
            else 
                b = c;
        }  

        if(a != -1) 
        {
            int temp = 0, t = a;
            for(int j = 0; j + t < q && j < 5; j++)
            {
                temp = max(temp, min(min((y + mn[a]), (x + mx[a])) - x, abs(x - y))); 
                //cerr << min((y + mn[a]), (x + mx[a])) - x << " " << min((y + mn[a]), (x + mx[a])) << " "<< temp << endl;
                a++;
            }
            ans += temp; //cerr << "A: " << mx[a] << " " << temp << endl;
        }

        a = -1; b = q; 

        x = v[i]; y = (i != 0 ? v[i-1] : -Inf);
        
        while(abs(a - b) != 1)
        {
            int c = (a + b) / 2;//cerr << mx[c] + x << " " << mn[c] + y << endl;

            if(mn[c] + x > mx[c] + y)
                a = c; 
            else 
                b = c;
        }   //cerr << a << " " << mn[a] << endl;

        if(a != -1)
        {
            int temp = 0, t = a; //cerr << a << " " << x - mn[a] << " " << mx[a] << endl;
            for(int j = 0; j + t < q && j < 5; j++)
            {      //cerr << max((x + mn[a]), (y + mx[a])) << endl;
                temp = max(temp, min(x - max((x + mn[a]), (y + mx[a])), abs(x - y)));
                a++;
            }
            ans += temp; //cerr << "B: " << mx[a] << " " << temp << endl;
        }

        cout << ans << endl;    
    }
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int Q = 1; //cin >> Q;

    while (Q--)
    {
        solve();
    }

    return 0;
}

• Subtask 1: 33 / 33
• Subtask 2: 67 / 67