제출 #716051

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
716051		Charizard2021	Worm Worries (BOI18_worm)	C++17	23 / 100	977 ms	276 KiB

worm

#include <iostream>
#include <vector>
#include <cmath>
#include <cstdlib>
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(){
	srand(561);

	cin >> n >> m >> k >> maxq;

	int samples = 100000; // I'm feeling lucky

	int record = 0;
	int x, y, z;
	for(int i=0; i<samples; ++i){

		int a = 1+rand()%n,
		    b = 1+rand()%m,
		    c = 1+rand()%k;

		int res = value(a, b, c);
		if(res > record){
			record = res;
			x = a, y = b, z = c;
		}
	}

	vector<bool> tried(6, false);
	foo:

	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],
			    y1 = y + dy[i],
			    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;
				goto foo;
			} else {
				tried[i] = true;
				goto foo;
			}
		}
		--r;
	}

}

컴파일 시 표준 에러 (stderr) 메시지

worm.cpp: In function 'int main()':
worm.cpp:55:43: warning: 'z' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |   cout << "! " << x << ' ' << y << ' ' << z << endl;
      |                                           ^
worm.cpp:55:36: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |   cout << "! " << x << ' ' << y << ' ' << z << endl;
      |                                    ^~~
worm.cpp:55:24: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |   cout << "! " << x << ' ' << y << ' ' << z << endl;
      |                        ^~~

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