#define DEBUG 0
#include <bits/stdc++.h>
using namespace std;
#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}
// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
public:
template<typename T>
_Debug& operator,(T val) {
cout << val << endl;
return *this;
}
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif
// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back
// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;
// ---------- END OF TEMPLATE ----------
#include "xylophone.h"
int ans[5000];
void detect_pitch(int N) {
int i;
ans[0] = 0,ans[1] = ask(0,1);
int m = 0;
for (i = 2; i < N; i++) {
int x = ask(i-1,i),y = ask(i-2,i);
if (max(ans[i-2],ans[i-1]+x)-min(ans[i-2],ans[i-1]) == y) ans[i] = ans[i-1]+x;
else ans[i] = ans[i-1]-x;
m = min(m,ans[i]);
}
int si,bi;
for (i = 0; i < N; i++) {
ans[i] -= m;
if (ans[i] == 0) si = i;
if (ans[i] == N-1) bi = i;
}
if (si > bi) {
for (i = 0; i < N; i++) ans[i] = N-1-ans[i];
}
for (i = 0; i < N; i++) answer(i,ans[i]);
}
Compilation message
xylophone.cpp: In function 'void detect_pitch(int)':
xylophone.cpp:62:25: error: 'ask' was not declared in this scope
ans[0] = 0,ans[1] = ask(0,1);
^~~
xylophone.cpp:66:64: error: 'y' was not declared in this scope
if (max(ans[i-2],ans[i-1]+x)-min(ans[i-2],ans[i-1]) == y) ans[i] = ans[i-1]+x;
^
