Submission #116632

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
116632	2019-06-13 09:13:50	roseanne_pcy	Cave (IOI13_cave)	C++14	100 / 100	1287 ms	684 KiB

cave

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#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
#define vi vector<int>
#define pb push_back
bool solved[5005];
int sol[5005];
int connect[5005];
int arr[5005];
int tmp[5005];
vi cand;
void exploreCave(int n)
{
    for(int i = 0; i< n; i++) cand.pb(i);
    for(int it = 0; it< n-1; it++)
    {
        //printf("-----iteration %d\n", it);
        for(int i = 0; i< n; i++) if(solved[i]) arr[i] = sol[i];
        for(int i = 0; i< (int) cand.size(); i++) arr[cand[i]] = 0;
        int last = tryCombination(arr);
        if(last == -1) last = 1e9;
        int L = 0, R = cand.size()-1;
        memset(tmp, 0, sizeof tmp);
        while(L< R)
        {
            //printf("L = %d and R = %d\n", L, R);
            int mid = (L+R)/2;
            for(int i = 0; i< n; i++) if(solved[i]) arr[i] = sol[i];
            for(int i = mid+1; i<= R; i++) if(!solved[cand[i]]) arr[cand[i]] = 1-arr[cand[i]];
            int x = tryCombination(arr);
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24