Submission #1114551

#	Time	Username	Problem	Language	Result	Execution time	Memory
1114551		NotLinux	Mađioničar (COI22_madionicar)	C++17	100 / 100	4185 ms	13812 KiB

Main

#include <bits/stdc++.h>
 
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long
 
using namespace std;
 
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
 
const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
 
map<pii, int> mp;
 
int query(int l, int r) {
    if(mp.count({ l, r })) return mp[{ l, r }];
    cout << "? " << l << " " << r << endl;
    int x;
    cin >> x;
    return mp[{ l, r }] = x;
}
 
int get1(int p, int d, int n) {
    if(p - d < 1 || p + d > n) return 0;
    return query(p - d, p + d);
}
 
int get2(int p, int d, int n) {
    if(p - d + 1 < 1 || p + d > n) return 0;
    return query(p - d + 1, p + d);
}
 
signed main() {
    int n, ans1=0, ans2=0;
    cin >> n;
 
    for(int i=1; i<=n; i++)
        while(get1(i, ans1+1, n)) ans1++;
    for(int i=1; i+1<=n; i++)
        while(get2(i, ans2+1, n)) ans2++;
 
    cout << "! " << max(2 * ans1 + 1, 2 * ans2) << endl; 
    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37