Submission #716075

#	Time	Username	Problem	Language	Result	Execution time	Memory
716075		Charizard2021	Worm Worries (BOI18_worm)	C++17	59 / 100	873 ms	280 KiB

worm

#include<bits/stdc++.h>
using namespace std;
int n, m, k, maxq;
int value(int x, int y, int z){
	if(x <= 0 || x > n || y <= 0 || y > m || z <= 0 || z > k){
        return 0;
    }
	cout << "? " << x << " " << y << " " << z << endl;
	int ans;
	cin >> ans;
	if (ans == -1){
        exit(0);
    }
	return ans;
}
int dx[] = {1, -1, 0, 0, 0, 0};
int dy[] = {0, 0, 1, -1, 0, 0};
int dz[] = {0, 0, 0, 0, 1, -1};
int main(){
	cin >> n >> m >> k >> maxq;
	int V = n * m * k;
	int samples = maxq / 2;
	int record = 0;
	int x = -1, y = -1, z = -1;
	for(int i = 0; i < samples; i++){
		int a = 1 + rand() % n;
        int b = 1 + rand() % m;
		int c = 1 + rand() % k;
		int res = value(a, b, c);
		if(res > record){
			record = res;
			x = a, y = b, z = c;
		}
	}
	int walked = 0;
	vector<bool> tried(6, false);
	while (true) {
		int left = 0;
		for(int i = 0; i < 6; i++){
			left += (int)!tried[i];
        }
		if(left == 0){
			cout << "! " << x << ' ' << y << ' ' << z << endl;
			return 0;
		}
		int r = rand() % left;
		for(int i = 0; i < 6; i++){
            if(!tried[i]){
                if(r == 0){
                    int x1 = x + dx[i];
                    int	y1 = y + dy[i];
                    int	z1 = z + dz[i];
                    int res = value(x1, y1, z1);
                    if(res > record){
                        record = res;
                        x = x1;
                        y = y1;
                        z = z1;
                        for(int j = 0; j < 6; j++){
                            tried[j] = false;
                        }
                        tried[i ^ 1] = true;
                        walked++;
                        break;
                    }
                    else {
                        tried[i] = true;
                        break;
                    }
                }
			    r--;
		    }
        }
	}
}

Compilation message (stderr)

worm.cpp: In function 'int main()':
worm.cpp:21:6: warning: unused variable 'V' [-Wunused-variable]
   21 |  int V = n * m * k;
      |      ^

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