Submission #959499

#	Time	Username	Problem	Language	Result	Execution time	Memory
959499		idas	Worm Worries (BOI18_worm)	C++11	10 / 100	3014 ms	600 KiB

worm

#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define sz(x) ((int)((x).size()))
#define le(vec) vec[vec.size()-1]
#define all(x) (x).begin(), (x).end()
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)

using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef map<int, int> mii;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;

const int INF=1e9, MOD=1e9+7, mod=998244353;
const ll LINF=1e18;

void setIO()
{
    FAST_IO;
}

void setIO(string s)
{
    FAST_IO;
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

const int N=1e6+10;
int n, M, K, q, dp[N];

int qr(int i, int j, int k)
{
    if(--q<0){ while(true); }
    cout << "? " << i << " " << j << " " << k << endl;
    int ret; cin >> ret;
    dp[i]=ret;

    return ret;
}

int get(int i)
{
    if(i==0||i==n+1) return 0;
    if(dp[i]!=0) return dp[i];
    return qr(i, 1, 1);
}

int main()
{
    setIO();
    cin >> n >> M >> K >> q;

    int l=1, r=n;
    while(l<r){
        int m=(l+r+1)/2;
        int a=get(m-1), b=get(m);
        if(a>=b) r=m-1;
        else l=m;
    }

    cout << "! " << l << " " << 1 << " " << 1 << endl;
}

Compilation message (stderr)

worm.cpp: In function 'void setIO(std::string)':
worm.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
worm.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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