Submission #474795

#	Time	Username	Problem	Language	Result	Execution time	Memory
474795		robell	Treasure (different grader from official contest) (CEOI13_treasure2)	C++17	1 / 100	2 ms	588 KiB

treasure

#pragma GCC optimize("O2")
#include <treasure.h>
#include <bits/stdc++.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
#define 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();
}
int n;
vector<pair<int,int>> spots;
void grid(int bx, int by, int ux, int uy){
	int cells=countTreasure(bx,by,ux,uy);
	if (cells==0) return;
	if (bx>=ux && by>=uy){
		spots.pb({bx,by});return;
	}
	if ((bx-ux)%2==0){
		grid(bx,by,(ux+bx)/2,(uy+by)/2);//top left subgrid
		grid((ux+bx)/2,by,ux,(uy+by)/2);//top right subgrid
		grid(bx,(uy+by)/2,(ux+bx)/2,uy);//bottom left subgrid
		grid((ux+bx)/2,(uy+by)/2,ux,uy);//bottom right subgrid
	}else{
		grid(bx,by,(ux+bx)/2,(uy+by)/2);
		grid((ux+bx)/2+1,by,ux,(uy+by)/2);
		grid(bx,(uy+by)/2+1,(ux+bx)/2,uy);
		grid((ux+bx)/2+1,(uy+by)/2+1,ux,uy);
	}
}
void findTreasure(int N){
	n=N;
	grid(1,1,N,N);
	set<pair<int,int>> ans;
	bool grid[N][N];
	for (int i=0;i<N;i++){
		for (int j=0;j<N;j++){
			grid[i][j]=false;
		}
	}
	for (int i=0;i<spots.size();i++){
		ans.insert(spots[i]);
	}
	for (pair<int,int> b:ans){
		Report(b.first,b.second);
	}
}

Compilation message (stderr)

treasure.cpp: In function 'void findTreasure(int)':
treasure.cpp:54:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |  for (int i=0;i<spots.size();i++){
      |               ~^~~~~~~~~~~~~
treasure.cpp:48:7: warning: variable 'grid' set but not used [-Wunused-but-set-variable]
   48 |  bool grid[N][N];
      |       ^~~~
treasure.cpp: In function 'void setIO(std::string)':
treasure.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);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
treasure.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: 1 / 100