답안 #68391 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
68391	2018-08-17T04:17:10 Z	nvmdava	Aliens (IOI07_aliens)	C++17	100 / 100	5 ms	556 KB

aliens

#include <bits/stdc++.h>
using namespace std;

long long n;
char s[10];

bool ask(int x, int y){
	if(x > n || x < 1 || y > n || y < 1){
		return 0;
	}
	printf("examine %d %d\n", x, y);
	fflush(stdout);
	scanf("%s", &s);
	return (s[0] == 't');
}

long long x, y, m;

int main(){
	scanf("%d %d %d",&n,&x,&y);
	long long left, right, up, down;
	
	long long l = 0, r = x;
	while(l + 1 != r){
		int m = (l + r) / 2;
		if(ask(m, y)){
			r = m;
		} else {
			l = m;
		}
	}
	left = l;
	
	l = x, r = n + 1;
	while(l + 1 != r){
		int m = (l + r) / 2;
		if(ask(m, y)){
			l = m;
		} else {
			r = m;
		}
	}
	right = l;
	
	l = 0, r = y;
	while(l + 1 != r){
		long long m = (l + r) / 2;
		if(ask(x, m)){
			r = m;
		} else {
			l = m;
		}
	}
	up = l;
	
	l = y, r = n + 1;
	while(l + 1 != r){
		long long m = (l + r) / 2;
		if(ask(x, m)){
			l = m;
		} else {
			r = m;
		}
	}
	down = l;
	
	m = __gcd(right - left, down - up);
	right = left + m;
	down = up + m;
	x = (right + left) / 2 + 1;
	y = (down + up) / 2 + 1;
	if(m % 3 == 0){
		if(ask(x, y + m / 3) == 0){
			m /= 3;
		}
	}
	if(m % 5 == 0){
		if(ask(x + m / 5, y) == 0){	
			m /= 5;
		}
	}
	right = left + m;
	down = up + m;
	x = (right + left) / 2 + 1;
	y = (down + up) / 2 + 1;
	
	while(ask(x - m, y - m) ){
		x -= m;
		y -= m;
	}
	while(ask(x - 2 * m, y) ){
		x -= 2 * m;
	}
	while(ask(x, y - 2 * m) ){
		y -= m * 2;
	}
	
	printf("solution %d %d\n", x + 2 * m, y + 2 * m);
}

Compilation message

aliens.cpp: In function 'bool ask(int, int)':
aliens.cpp:13:16: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[10]' [-Wformat=]
  scanf("%s", &s);
              ~~^
aliens.cpp: In function 'int main()':
aliens.cpp:20:27: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  scanf("%d %d %d",&n,&x,&y);
                   ~~      ^
aliens.cpp:20:27: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
aliens.cpp:20:27: warning: format '%d' expects argument of type 'int*', but argument 4 has type 'long long int*' [-Wformat=]
aliens.cpp:98:49: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("solution %d %d\n", x + 2 * m, y + 2 * m);
                             ~~~~~~~~~           ^
aliens.cpp:98:49: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=]
aliens.cpp: In function 'bool ask(int, int)':
aliens.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", &s);
  ~~~~~^~~~~~~~~~
aliens.cpp: In function 'int main()':
aliens.cpp:20:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d",&n,&x,&y);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	3 ms	376 KB	Output is correct

Subtask #2
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	492 KB	Output is correct
2	Correct	2 ms	492 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	492 KB	Output is correct
2	Correct	5 ms	500 KB	Output is correct

Subtask #4
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	524 KB	Output is correct
2	Correct	3 ms	524 KB	Output is correct

Subtask #5
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	524 KB	Output is correct
2	Correct	3 ms	524 KB	Output is correct

Subtask #6
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	524 KB	Output is correct
2	Correct	2 ms	524 KB	Output is correct

Subtask #7
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	524 KB	Output is correct
2	Correct	3 ms	524 KB	Output is correct
3	Correct	2 ms	524 KB	Output is correct

Subtask #8
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	524 KB	Output is correct
2	Correct	3 ms	556 KB	Output is correct
3	Correct	2 ms	556 KB	Output is correct

Subtask #9
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	556 KB	Output is correct
2	Correct	3 ms	556 KB	Output is correct
3	Correct	3 ms	556 KB	Output is correct

Subtask #10
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	556 KB	Output is correct
2	Correct	3 ms	556 KB	Output is correct
3	Correct	3 ms	556 KB	Output is correct