Submission #723743

#	Time	Username	Problem	Language	Result	Execution time	Memory
723743		Mr_Husanboy	Worm Worries (BOI18_worm)	C++17	0 / 100	1 ms	208 KiB

worm

#include <bits/stdc++.h>

using namespace std;

int max_Q;
int n, m, k;
int cnt_q = 0;
#ifdef LOCAL
vector<vector<vector<int>>> mat;
#endif

int ask(int x, int y, int z) {
    printf("? %d %d %d\n", x, y, z);
    fflush(stdout);
    int ans = -1;
    #ifdef LOCAL
    cnt_q ++;
    if(x > n || y > m || z > k || cnt_q > max_Q){
        ans = -1;
    }else{
        ans = mat[x - 1][y - 1][z - 1];
    }
    #else
    (void)scanf("%d", &ans);
    #endif
    if (ans == -1) exit(0);
    return ans;
}

__attribute__((noreturn))
void guess(int x, int y, int z) {
    printf("! %d %d %d\n", x, y, z);
    exit(0);
}

mt19937 mt();

void sub1(int &n){
    int l = 1, r = n;
    while(l < r){
        int m = (l + r) >> 1;
        if(l == r){
            guess(l, 1, 1);
        }
        int h = ask(m + 1, 1, 1);
        int hh = ask(m, 1, 1);
        if(l == r - 1){
            if(h > hh){
                guess(m + 1, 1, 1);
            }else{
                guess(m, 1, 1);
            }
        }
        if(h >= hh){
            l = m + 1;
        }else{
            r = m;
        }
    }

}

void solve(){
    cin >> n >> m >> k;
    cin >> max_Q;
    #ifdef LOCAL
    mat.assign(n, vector(m, vector(k, 0)));
    for(int i = 0; i < n; i ++){
        for(int j = 0; j < m; j ++){
            for(int ii = 0; ii < k; ii ++){
                cin >> mat[i][j][ii];
            }
        }
    }
    #endif
    if(n <= 1000000){
        sub1(n);
    }
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int testcases = 1;

    while(testcases --){
        solve();
        if(testcases) cout << '\n';
        #ifdef LOCAL
        else cout << '\n';
        cout << "__________________________" << endl;
        #endif
    }
    return 0;
}

Compilation message (stderr)

worm.cpp: In function 'int ask(int, int, int)':
worm.cpp:24:16: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     (void)scanf("%d", &ans);
      |           ~~~~~^~~~~~~~~~~~

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