Submission #479977

#	Time	Username	Problem	Language	Result	Execution time	Memory
479977		robell	Cave (IOI13_cave)	C++17	0 / 100	117 ms	368 KiB

cave

#pragma GCC optimize("O2")
#include <bits/stdc++.h>
#include "cave.h"
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag, tree_order_statistics_node_update> indexed_set;
typedef long long ll;
#define pb push_back
#define eb emplace_back
#define countbits __builtin_popcount
#define beg0 __builtin_clz
#define terminal0 __builtin_ctz
int mod=1e9+7;
void setIO(){
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}
void setIO(string f){
	freopen((f+".in").c_str(),"r",stdin);
	freopen((f+".out").c_str(),"w",stdout);
	setIO();
}
void exploreCave(int N){
	int pos[N];
	int ans[N];
	memset(pos,0,sizeof(pos));
	memset(ans,-1,sizeof(ans));
	while (true){
		int door = tryCombination(pos);
		if (door<0){
			for (int i=0;i<N;i++){
				if (ans[i]<0){
					pos[i]=(~pos[i]);
					ans[i]=tryCombination(pos);
					pos[i]=(~pos[i]);
				}
			}
			break;
		}else{
			for (int i=0;i<N;i++){
				if (ans[i]<0){
					pos[i]=(~pos[i]); int nval = tryCombination(pos);
					if (nval<door){
						ans[i]=nval;
						pos[i]=(~pos[i]);
					}else if (nval==door){
						ans[i]=door;
					}
				}
			}
		}
	}
	int keys[N];for (int i=0;i<N;i++) keys[i]=(~pos[i]);
	int doors[N];for (int i=0;i<N;i++) doors[i]=ans[i];
	answer(keys,doors);
}

Compilation message (stderr)

cave.cpp: In function 'void setIO(std::string)':
cave.cpp:20:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |  freopen((f+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cave.cpp:21:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |  freopen((f+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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