Submission #535640

#	Time	Username	Problem	Language	Result	Execution time	Memory
535640		Farhan_HY	Trampoline (info1cup20_trampoline)	C++14	0 / 100	2099 ms	236300 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>> tramp;
map<int, set<int>> rtramp;
map<pair<int, int>, int> num;
map<int, int> getx;
int r, c, n;
int sparce[N][LOG];

void build()
{
    for(auto y: tramp)
    {
        set<int> st = rtramp[y.F - 1];
        for(auto x: y.S)
        {
            int me = num[{y.F, x}];
            auto idx = st.lower_bound(-x);
            if (idx == st.end())
            {
                sparce[me][0] = 0;
                continue;
            }
            int he = num[{y.F - 1, -*idx}];
            sparce[me][0] = he;
        }
    }
    for(int j = 1; j < LOG; j++)
    {
        for(auto y: tramp)
        {
            for(auto x: y.S)
            {
                int me = num[{y.F, x}];
                int he = sparce[me][j - 1];
                sparce[me][j] = sparce[he][j - 1];
            }
        }
    }
}

main()
{
    IOS
    cin >> r >> c >> n;
    for(int i = 1; i <= n; i++)
    {
        int x, y;
        cin >> y >> x;
        num[{y, x}] = i;
        getx[num[{y, x}]] = x;
        tramp[y].insert(x);
        rtramp[y].insert(-x);
    }
    build();
    T
    {
        int y, x, yy, xx;
        cin >> y >> x >> yy >> xx;
        if (y == yy)
        {
            cout << "Yes\n";
            continue;
        }
        yy--;
        auto it = rtramp[yy].lower_bound(-xx);
        if (it == rtramp[yy].end())
        {
            cout << "No\n";
            continue;
        }
        xx = -*it;
        it = tramp[y].lower_bound(x);
        if (it == tramp[y].end())
        {
            cout << "No\n";
            continue;
        }
        x = *it;
        int dist = yy - y;
        int cnt = 0;
        while(dist)
        {
            while(dist & 1 == 0)
                dist = dist >> 1, cnt++;
            int me = num[{yy, xx}];
            int he = sparce[me][cnt];
            xx = getx[he];
            yy += (1 << cnt);
            dist = dist >> 1;
            cnt++;
        }
        if(xx >= x)
            cout << "Yes\n";
        else
            cout << "No\n";
    }
}
/*
4 5 2
2 2
3 4
3
2 1 4 5
1 2 1 4
2 3 4 4
*/

Compilation message (stderr)

trampoline.cpp:57:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   57 | main()
      | ^~~~
trampoline.cpp: In function 'int main()':
trampoline.cpp:99:28: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   99 |             while(dist & 1 == 0)
      |                          ~~^~~~

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