Submission #556073

#	Time	Username	Problem	Language	Result	Execution time	Memory
556073		urosk	Xylophone (JOI18_xylophone)	C++14	100 / 100	98 ms	1124 KiB

xylophone

#include "xylophone.h"
#define here cerr<<"===========================================\n"
#include <bits/stdc++.h>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) int(a.size())
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
using namespace std;
static int A[5000];
#define maxn 5005
int a[maxn];
map<pii,int> mp;
int get(int l,int r){
    if(mp.count({l,r})) return mp[{l,r}];
    return mp[{l,r}] = query(l,r);
}
bool vis[maxn];
void solve(int N) {

	int n = N;
	a[1] = 0;
    a[2] = get(1,2);
    for(int i = 3;i<=n;i++){
        int x = get(i-1,i);
        int y = get(i-2,i-1);
        int z = get(i-2,i);
        if(x+y==z){
            if(a[i-1]>=a[i-2]) a[i] = a[i-2] + z;
            else a[i] = a[i-2] - z;
        }else if(z==x){
            if(a[i-1]>=a[i-2]) a[i] = a[i-1] - x;
            else a[i] = a[i-1] + x;
        }else{
            if(a[i-1]>=a[i-2]) a[i] = a[i-1] - x;
            else a[i] = a[i-1] + x;
        }
    }
    int mini = llinf;
    for(int i = 1;i<=n;i++){
        mini = min(mini,a[i]);
    }
    int idx1,idxn;
    for(int i = 1;i<=n;i++){
        a[i]-=mini-1;
        if(a[i]==1) idx1 = i;
        if(a[i]==n) idxn = i;
    }
    if(idx1>idxn) for(int i = 1;i<=n;i++) a[i] = n-a[i]+1;
    if(n<=10) ceri(a,1,n);
    for(int i = 1;i<=n;i++) answer(i,a[i]);
}
/*
5
2 1 5 3 4
*/

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:7:15: warning: overflow in conversion from 'long long int' to 'int' changes value from '100000000000000000' to '1569325056' [-Woverflow]
    7 | #define llinf 100000000000000000LL // 10^17
      |               ^~~~~~~~~~~~~~~~~~~~
xylophone.cpp:50:16: note: in expansion of macro 'llinf'
   50 |     int mini = llinf;
      |                ^~~~~
xylophone.cpp: At global scope:
xylophone.cpp:21:12: warning: 'A' defined but not used [-Wunused-variable]
   21 | static int A[5000];
      |            ^
xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:60:5: warning: 'idxn' may be used uninitialized in this function [-Wmaybe-uninitialized]
   60 |     if(idx1>idxn) for(int i = 1;i<=n;i++) a[i] = n-a[i]+1;
      |     ^~
xylophone.cpp:60:5: warning: 'idx1' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53