Submission #541401

#	Time	Username	Problem	Language	Result	Execution time	Memory
541401		Lobo	Worm Worries (BOI18_worm)	C++17	10 / 100	1 ms	336 KiB

worm

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

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
// #define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

const int maxn = 1e6 + 10;

int n,aux,a[maxn];

int qrr(int x) {
    if(x == 0 || x == n+1 || a[x] != 0) return a[x];

    cout << "? " << x << " 1 1" << endl;
    int o; cin >> o;
    return o;

}

void solve() {
    cin >> n >> aux >> aux >> aux;

    int l = 1;
    int r = n;

    while(l <= r) {

        int m = (l+r)/2;
        a[m] = qrr(m);
        
        a[m-1] = qrr(m-1);
        a[m+1] = qrr(m+1);

        if(a[m-1] > a[m]) {
            r = m-1;
        }
        else if(a[m+1] > a[m]) {
            l = m+1;
        }
        else {
            cout << "! " << m << " 1 1" << endl;
            return;
        }
    }
}

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

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);

    int tt = 1;
    // cin >> tt;
    while(tt--) solve();

}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 22
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 14
• Subtask 6: 0 / 23