Submission #530503

#	Time	Username	Problem	Language	Result	Execution time	Memory
530503		Killer2501	Trampoline (info1cup20_trampoline)	C++14	100 / 100	369 ms	41072 KiB

trampoline

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define pb push_back
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fi first
#define se second
using namespace std;
const int N = 2e5+5;
const int M = 1e2+2;
const int mod = 1e9+7;
const ll base = 75;
const int inf = 1e9;
int m, n, t, b[N], d[N], lab[N], q;
int k, a[N], dp[N], P[N][20];
ll ans, tong;
vector<int> adj[N];
vector<int> vi;
string s[N];
bool vis[N];
ll pw(ll k, ll n)
{
    ll total = 1;
    for(; n; n >>= 1)
    {
        if(n&1)total = total * k % mod;
        k = k * k % mod;
    }
    return total;
}
void add(int &x, int y)
{
    x += y;
    if(x >= mod)x -= mod;
}
int findp(int u)
{
    return lab[u] < 0 ? u : lab[u] = findp(lab[u]);
}
void hop(int u, int v)
{
    u = findp(u);
    v = findp(v);
    if(u == v)return;
    if(lab[u] > lab[v])swap(u, v);
    lab[u] += lab[v];
    lab[v] = u;
}
int C(int u, int v)
{
    if(u > v)return 0;
    return 1ll * a[v] * b[u] % mod * b[v-u] % mod;
}
pii p[N];
void sol()
{
    cin >> n >> m >> k;
    for(int i = 1; i <= k; i ++)cin >> p[i].fi >> p[i].se;
    sort(p+1, p+1+k);
    for(int i = 1; i <= k; i ++)
    {
        int j = lower_bound(p+1, p+1+k, make_pair(p[i].fi+1, p[i].se)) - p;
        if(j <= k && p[j].fi == p[i].fi+1)P[i][0] = j;
        //cout << i <<" "<<j<<'\n';
    }
    for(int j = 1; j <= 18; j ++)
    {
        for(int i = 1; i <= k; i ++)P[i][j] = P[P[i][j-1]][j-1];
    }
    cin >> q;
    while(q -- > 0)
    {
        pii l, r;
        cin >> l.fi >> l.se >> r.fi >> r.se;
        if(l.fi > r.fi || l.se > r.se)cout << "No" << '\n';
        else if(l.fi == r.fi)cout << "Yes" << '\n';
        else
        {
            int i = lower_bound(p+1, p+1+k, l) - p;

            if(i > k || l.fi != p[i].fi)cout << "No" << '\n';
            else
            {
                for(int j = 18; j >= 0; j --)
                {
                    if(P[i][j] && p[P[i][j]].fi < r.fi-1)i = P[i][j];
                }
                if(p[i].fi < r.fi-1 && P[i][0])i = P[i][0];
                if(p[i].fi == r.fi-1 && p[i].se <= r.se)cout << "Yes" << '\n';
                else cout << "No" << '\n';
            }
        }
    }
}
int main()
{
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    #define task "test"
    if(fopen(task".inp", "r"))
	{
		freopen(task".inp", "r", stdin);
		freopen(task".out", "w", stdout);
	}
    int test = 1;
    //cin >> test;
    while(test -- > 0)sol();
    return 0;
}

Compilation message (stderr)

trampoline.cpp: In function 'int main()':
trampoline.cpp:105:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |   freopen(task".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
trampoline.cpp:106:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |   freopen(task".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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