Submission #303935

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
303935	2020-09-20T19:45:36 Z	rocks03	Cave (IOI13_cave)	C++14	Compilation error	0 ms	0 KB

cave

//#include "cave.h"
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
#define pb push_back
#define SZ(x) ((int) (x).size())
using namespace std;

void answer(int S[], int D[]);
int tryCombination(int S[]);

pii recur(int res, int l, int r, vector<int>&v, int ans[]){
    if(l == r){
        return {v[l], res};
    }
    int m = (l + r) / 2;
    for(int i = l; i <= m; i++){
        ans[v[i]] ^= 1;
    }
    int res2 = tryCombination(ans);
    for(int i = l; i <= m; i++){
        ans[v[i]] ^= 1;
    }
    if(res2 > res){
        return recur(res, l, m, v, ans);
    } else if(res2 == res){
        return recur(res2, m+1, r, v, ans);
    } else if(res2 < res){
        for(int i = l; i <= m; i++){
            ans[v[i]] ^= 1;
        }
        return recur(res2, l, m, v, ans);
    }
}

void exploreCave(int N){
    int ans[N], d[N];
    memset(ans, 0, sizeof(ans));
    memset(d, -1, sizeof(d));
    vector<int> v(N);
    iota(v.begin(), v.end(), 0);
    while(SZ(v)){
        pii p = recur(tryCombination(ans), 0, SZ(v) - 1, v, ans);
        d[p.ff] = p.ss;
        ans[p.ff] ^= 1;
        v.erase(find(v.begin(), v.end(), p.ff));
    }
    answer(ans, d);
}

Compilation message

cave.cpp: In function 'std::pair<int, int> recur(int, int, int, std::vector<int>&, int*)':
cave.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type]
   37 | }
      | ^
/tmp/ccK1n5EO.o: In function `recur(int, int, int, std::vector<int, std::allocator<int> >&, int*)':
cave.cpp:(.text+0x95): undefined reference to `tryCombination(int*)'
cave.cpp:(.text+0x159): undefined reference to `tryCombination(int*)'
/tmp/ccK1n5EO.o: In function `exploreCave(int)':
cave.cpp:(.text+0x288): undefined reference to `tryCombination(int*)'
cave.cpp:(.text+0x354): undefined reference to `answer(int*, int*)'
/tmp/ccYZMFYN.o: In function `main':
grader.c:(.text.startup+0xc): undefined reference to `exploreCave'
collect2: error: ld returned 1 exit status