Submission #1285991

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285991		aritro_	Gondola (IOI14_gondola)	C++20	Compilation error	0 ms	0 KiB

gondola

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

#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template <typename T> using ordset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

/*
less<T> can be changed to:
1. less_equal<T>
2. greater<T>

ordered_set functions:
1. *(os.find_by_order(x)) -> return the value at position x (0 base)
2. os.order_of_key(x) -> return the number of elements less than x
*/

typedef long long ll;
//#define int ll
#define endl '\n'
#define pb push_back
#define ff first
#define ss second
#define all(a) a.begin(),a.end()

const int MOD=1000000007;

#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (a*(b/gcd(a,b)))

#define fios(); ios_base::sync_with_stdio(0);cin.tie(0);
#define fraction(x); cout.unsetf(ios::floatfield); cout.precision(x); cout.setf(ios::fixed,ios::floatfield);
#define file(); freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);

bool valid(int n,int arr[]){
    //subtask 1
    int a[n*2];
    for(int i=0;i<n;i++) a[i]=arr[i];
    for(int i=n;i<n*2;i++) a[i]=arr[i-n];
    int cur=1;
    bool b=0;
    for(int i=0;i<n*2;i++){
        if(cur==n+1) break;
        if(a[i]==1&&b==0){
            b=1;
            cur++;
        }
        else if(a[i]==cur) cur++;
        else if(a[i]!=cur&&b==1) return 0;
        if(cur==n+1) break;
    }
    return 1;
}

Compilation message (stderr)

gondola.cpp: In function 'bool valid(int, int*)':
gondola.cpp:41:32: warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)' writing between 12884901888 and 17179869180 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=]
   41 |     for(int i=n;i<n*2;i++) a[i]=arr[i-n];
      |                            ~~~~^~~~~~~~~
gondola.cpp:39:9: note: at offset [-4294967296, -4] into destination object 'a' of size [0, 9223372036854775807]
   39 |     int a[n*2];
      |         ^
/usr/bin/ld: /tmp/ccRMc4mo.o: in function `main':
grader.cpp:(.text.startup+0xae): undefined reference to `valid'
/usr/bin/ld: grader.cpp:(.text.startup+0xfc): undefined reference to `replacement'
/usr/bin/ld: grader.cpp:(.text.startup+0x18d): undefined reference to `countReplacement'
collect2: error: ld returned 1 exit status