Submission #532917

#	Time	Username	Problem	Language	Result	Execution time	Memory
532917		Farhan_HY	Trampoline (info1cup20_trampoline)	C++14	0 / 100	2088 ms	119708 KiB

trampoline

#include <bits/stdc++.h>
#define int long long
#define float double
#define pb push_back
#define F first
#define S second
#define T int t; cin >> t; while(t--)
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

using namespace std;

const int inf = 8e18;
const int N = 1e6 + 6;
const int M = 1e3 + 3;
const int LOG = 31;
const int mod = 1e9 + 7;
const float pi = atan(1) * 4;
map<int, set<int>> mp;
map<int, set<int>> rmp;
map<int, map<int, int>> num;
map<int, int> getx;
int n, c, r;
int sparce[N][LOG];

void build()
{
    for(auto y: mp)
    {
        for(auto x: y.S)
            sparce[num[y.F][x]][0] = num[y.F + 1][*mp[y.F + 1].lower_bound(x)];
    }
    for(int j = 1; j < LOG; j++)
    {
        for(auto y: mp)
        {
            for(auto x: y.S)
            {
                int me = num[y.F][x];
                int xx = sparce[me][j - 1];
                sparce[me][j] = sparce[xx][j - 1];
            }
        }
    }
}

main()
{
    IOS
    cin >> r >> c >> n;
    for(int i = 1; i <= n; i++)
    {
        int x, y;
        cin >> y >> x;
        getx[i] = x;
        mp[y].insert(x);
        rmp[y].insert(-x);
        num[y][x] = i;
    }
    build();
    T
    {
        int y, x, yy, xx;
        cin >> y >> x >> yy >> xx;
        if (y == yy)
        {
            cout << "Yes\n";
            continue;
        }
        auto start = mp[y].lower_bound(x);
        auto stop = rmp[yy - 1].lower_bound(-xx);
        if (start == mp[y].end() || stop == rmp[yy - 1].end())
        {
            cout << "No\n";
            continue;
        }
        int cur = num[y][*start];
        int cury = y;
        int curx = *start;
        int j = LOG - 1;
        yy--;
        while(cury < yy)
        {
            while ((1 << j) > yy - cury)
                j--;
            cur = sparce[cur][j];
            cury += (1 << j);
            curx = getx[cur];
            if (cur == 0)
            {
                curx = inf;
                break;
            }
        }
        if (curx <= xx)
            cout << "Yes\n";
        else
            cout << "No\n";
    }
}

Compilation message (stderr)

trampoline.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 | main()
      | ^~~~

• Subtask 1: 0 / 23
• Subtask 2: 0 / 20
• Subtask 3: 0 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27