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Submission #996064

# Submission time Handle Problem Language Result Execution time Memory
996064 2024-06-10T07:42:39 Z coldbr3w Xylophone (JOI18_xylophone) C++17
0 / 100
 2 ms 2648 KB 
#include <bits/stdc++.h>
#include "xylophone.h"
using namespace std;
#define ll long long

ll d2[(ll)1e5 + 100], d3[(ll)1e5 + 100], a[(ll)1e5 + 100], pos[(ll)1e5 + 100];
bool check(ll x, ll n){
	a[2] = x;
	for(int i = 3; i <= n;i++){
		if(a[i-1] > a[i-2]){
			if(d2[i-1] + d2[i] == d3[i]) a[i] = a[i-1] + d2[i];
			else a[i] = a[i-1] - d2[i];
		}
		else{
			if(d2[i-1] + d2[i] == d3[i]) a[i] = a[i-1] - d2[i];
			else a[i] = a[i-1] + d2[i];
		}
	}
	for(int i = 1; i <= n;i++) {
		if(a[i] < 0) return 0;
		pos[a[i]] = i;
	}
	ll ok = (pos[1] < pos[n]);
	for(int i = 1; i <= n;i++) ok &= (pos[i] > 0);
	if(ok){
		for(int i = 1; i <= n;i++) answer(i, a[i]);
		return 1;
	}
	else return 0;
}
void solve(int n){
	for(int i = 2; i <= n;i++) d2[i] = query(i - 1, i);
	for(int i = 3; i <= n;i++) d3[i] = query(i - 2, i);
	for(int val = 1; val <= n;val++){
		for(int i = 1; i <= n;i++) pos[i] = 0;
		a[1] = val;
		if(check(a[1] + d2[2], n)) return;
		if(check(a[1] - d2[2], n)) return;
	}
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 2 ms 2392 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 2 ms 2648 KB Output is correct
7 Incorrect 2 ms 2392 KB Wrong Answer [7]
8 Halted 0 ms 0 KB -

Subtask #2
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 2 ms 2392 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 2 ms 2648 KB Output is correct
7 Incorrect 2 ms 2392 KB Wrong Answer [7]
8 Halted 0 ms 0 KB -

Subtask #3
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 2 ms 2392 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 2 ms 2648 KB Output is correct
7 Incorrect 2 ms 2392 KB Wrong Answer [7]
8 Halted 0 ms 0 KB -