Submission #864683

#	Time	Username	Problem	Language	Result	Execution time	Memory
864683		Trisanu_Das	Mađioničar (COI22_madionicar)	C++17	100 / 100	1217 ms	600 KiB

Main

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

int query(int i, int j) {
	int x;
	printf("? %d %d\n", i + 1, j + 1), fflush(stdout);
	scanf("%d", &x);
	return x;
}
 
int main() {
	int n, t, i, l, l_;
	scanf("%d", &n);
	l_ = 0;
	for (t = 0; t <= 1; t++) {
		for (i = 0, l = t; i < n; i++) while (i > 0 && i + l < n && query(i - 1, i + l)) i--, l += 2;
		l_ = max(l_, l);
	}
	printf("! %d\n", l_), fflush(stdout);
}

Compilation message (stderr)

Main.cpp: In function 'int query(int, int)':
Main.cpp:7:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |  scanf("%d", &x);
      |  ~~~~~^~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37