oj.uz

Submission #433591

# Submission time Handle Problem Language Result Execution time Memory
433591 2021-06-20T08:05:26 Z AmineWeslati Xylophone (JOI18_xylophone) C++14
100 / 100
 143 ms 428 KB 
#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<int>vi;
#define pb push_back
#define sz(x) (int)x.size()
#define all(x) begin(x),end(x)

#define FOR(i,a,b) for(int i=a; i<b; i++)
#define ROF(i,a,b) for(int i=b-1; i>=a; i--)


void ckmin(int &x, int y){x=min(x,y);}
//------------------------------------

int N; 

bool check(vi a){
	int idx,idxx; 
	FOR(i,1,N+1){
		if(a[i]==1) idx=i;
		else if(a[i]==N) idxx=i;
	}
	return idx<idxx; 
}

void solve(int N){
	::N=N; 
	vi a(N),b(N-1);
	FOR(i,1,N){
		a[i]=query(i,i+1);
		if(i!=N-1) b[i]=query(i,i+2);
	}

	vi s(N); s[1]=1;
	FOR(i,1,N-1){
		if(a[i]+a[i+1]==b[i]){
			s[i+1]=s[i];
		}
		else{
			s[i+1]=-s[i];
		}
	}

	vi ans(N+1);
	ans[1]=1;
	FOR(i,1,N){
		ans[i+1]=ans[i]+s[i]*a[i];
	}

	int mn=1e9;
	FOR(i,1,N+1) ckmin(mn,ans[i]);
	FOR(i,1,N+1) ans[i]-=mn-1;

	if(!check(ans)){
		FOR(i,1,N) s[i]=-s[i];
		ans[1]=1;
		FOR(i,1,N){
			ans[i+1]=ans[i]+s[i]*a[i];
		}

		mn=1e9;
		FOR(i,1,N+1) ckmin(mn,ans[i]);
		FOR(i,1,N+1) ans[i]-=mn-1;
	}

	FOR(i,1,N+1) answer(i,ans[i]);
}

Compilation message

xylophone.cpp: In function 'bool check(vi)':
xylophone.cpp:26:13: warning: 'idxx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   26 |  return idx<idxx;
      |             ^~~~
xylophone.cpp:26:13: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:57:2: warning: 'idxx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   57 |  if(!check(ans)){
      |  ^~
xylophone.cpp:57:2: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 4 ms 200 KB Output is correct
5 Correct 3 ms 200 KB Output is correct
6 Correct 3 ms 200 KB Output is correct
7 Correct 2 ms 200 KB Output is correct
8 Correct 3 ms 200 KB Output is correct
9 Correct 4 ms 288 KB Output is correct
10 Correct 3 ms 200 KB Output is correct
11 Correct 3 ms 200 KB Output is correct
12 Correct 3 ms 200 KB Output is correct
13 Correct 2 ms 200 KB Output is correct
14 Correct 4 ms 200 KB Output is correct
15 Correct 4 ms 200 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 4 ms 200 KB Output is correct
5 Correct 3 ms 200 KB Output is correct
6 Correct 3 ms 200 KB Output is correct
7 Correct 2 ms 200 KB Output is correct
8 Correct 3 ms 200 KB Output is correct
9 Correct 4 ms 288 KB Output is correct
10 Correct 3 ms 200 KB Output is correct
11 Correct 3 ms 200 KB Output is correct
12 Correct 3 ms 200 KB Output is correct
13 Correct 2 ms 200 KB Output is correct
14 Correct 4 ms 200 KB Output is correct
15 Correct 4 ms 200 KB Output is correct
16 Correct 5 ms 200 KB Output is correct
17 Correct 5 ms 296 KB Output is correct
18 Correct 12 ms 284 KB Output is correct
19 Correct 18 ms 200 KB Output is correct
20 Correct 28 ms 288 KB Output is correct
21 Correct 24 ms 292 KB Output is correct
22 Correct 25 ms 288 KB Output is correct
23 Correct 19 ms 296 KB Output is correct
24 Correct 25 ms 276 KB Output is correct
25 Correct 24 ms 292 KB Output is correct
26 Correct 23 ms 292 KB Output is correct
27 Correct 22 ms 200 KB Output is correct
28 Correct 20 ms 280 KB Output is correct
29 Correct 26 ms 280 KB Output is correct
30 Correct 19 ms 296 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 4 ms 200 KB Output is correct
5 Correct 3 ms 200 KB Output is correct
6 Correct 3 ms 200 KB Output is correct
7 Correct 2 ms 200 KB Output is correct
8 Correct 3 ms 200 KB Output is correct
9 Correct 4 ms 288 KB Output is correct
10 Correct 3 ms 200 KB Output is correct
11 Correct 3 ms 200 KB Output is correct
12 Correct 3 ms 200 KB Output is correct
13 Correct 2 ms 200 KB Output is correct
14 Correct 4 ms 200 KB Output is correct
15 Correct 4 ms 200 KB Output is correct
16 Correct 5 ms 200 KB Output is correct
17 Correct 5 ms 296 KB Output is correct
18 Correct 12 ms 284 KB Output is correct
19 Correct 18 ms 200 KB Output is correct
20 Correct 28 ms 288 KB Output is correct
21 Correct 24 ms 292 KB Output is correct
22 Correct 25 ms 288 KB Output is correct
23 Correct 19 ms 296 KB Output is correct
24 Correct 25 ms 276 KB Output is correct
25 Correct 24 ms 292 KB Output is correct
26 Correct 23 ms 292 KB Output is correct
27 Correct 22 ms 200 KB Output is correct
28 Correct 20 ms 280 KB Output is correct
29 Correct 26 ms 280 KB Output is correct
30 Correct 19 ms 296 KB Output is correct
31 Correct 60 ms 288 KB Output is correct
32 Correct 67 ms 320 KB Output is correct
33 Correct 100 ms 320 KB Output is correct
34 Correct 81 ms 328 KB Output is correct
35 Correct 129 ms 328 KB Output is correct
36 Correct 130 ms 408 KB Output is correct
37 Correct 85 ms 328 KB Output is correct
38 Correct 105 ms 424 KB Output is correct
39 Correct 90 ms 320 KB Output is correct
40 Correct 74 ms 328 KB Output is correct
41 Correct 123 ms 308 KB Output is correct
42 Correct 115 ms 328 KB Output is correct
43 Correct 105 ms 308 KB Output is correct
44 Correct 96 ms 320 KB Output is correct
45 Correct 89 ms 328 KB Output is correct
46 Correct 93 ms 308 KB Output is correct
47 Correct 132 ms 328 KB Output is correct
48 Correct 102 ms 308 KB Output is correct
49 Correct 45 ms 428 KB Output is correct
50 Correct 104 ms 328 KB Output is correct
51 Correct 96 ms 328 KB Output is correct
52 Correct 105 ms 328 KB Output is correct
53 Correct 138 ms 320 KB Output is correct
54 Correct 137 ms 328 KB Output is correct
55 Correct 143 ms 328 KB Output is correct
56 Correct 120 ms 328 KB Output is correct
57 Correct 120 ms 316 KB Output is correct
58 Correct 86 ms 308 KB Output is correct
59 Correct 81 ms 328 KB Output is correct
60 Correct 86 ms 320 KB Output is correct