Submission #410768

#	Time	Username	Problem	Language	Result	Execution time	Memory
410768		iliccmarko	Cave (IOI13_cave)	C++14	0 / 100	396 ms	384 KiB

cave

#include <bits/stdc++.h>
#include "cave.h"
using namespace std;
#define ll long long
#define endl "\n"
#define INF 1000000000
#define LINF 10000000000000000LL
#define pb push_back
#define all(x) x.begin(), x.end()
#define len(s) (int)s.size()
#define test_case { int t; cin>>t; while(t--)solve(); }
#define single_case solve();
#define line cerr<<"----------"<<endl;
#define ios { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cerr.tie(NULL); }
#define mod 1000000007LL
const int N = 5005;
int sig[N];
int a[N];
int bb[N];


void exploreCave(int n)
{
    for(int i = 0;i<n;i++) sig[i] = -1;
    for(int b = 1;b<=n;b++)
    {
        for(int i = 0;i<n;i++) if(sig[i]!=-1) a[i] = sig[i]; else a[i] = 1;
        int x = tryCombination(a);
        if(x==-1) x = n;
        if(x>=b) x = 1;
        else x = 0;
        int l = 0;
        int r = n-1;
        int ans;
        while(l<r)
        {
            int mid = (l+r)/2;
            for(int i = 0;i<n;i++) if(sig[i]!=-1) a[i] = sig[i];
            for(int i = l;i<=mid;i++) if(sig[i]!=-1) a[i] = sig[i]; else a[i] = 1;
            for(int i = mid+1;i<=r;i++) if(sig[i]!=-1) a[i] = sig[i]; else a[i] = 0;
            int w = tryCombination(a);
            if(x)
            {
                if(w>=b)
                {
                    ans = mid;
                    r = mid;
                }
                else{
                    ans = mid + 1;
                    l = mid + 1;
                }
            }
            else
            {
                if(w<b)
                {
                    ans = mid;
                    r = mid;
                }
                else{
                    ans = mid + 1;
                    l = mid + 1;
                }
            }
        }
        sig[ans] = x;
        bb[ans] = b-1;
    }
    answer(sig, bb);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:68:17: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   68 |         bb[ans] = b-1;
      |         ~~~~~~~~^~~~~

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 30
• Subtask 5: 0 / 24