Submission #423688

#	Time	Username	Problem	Language	Result	Execution time	Memory
423688		amunduzbaev	Chameleon's Love (JOI20_chameleon)	C++14	Compilation error	0 ms	0 KiB

chameleon

/* made by amunduzbaev */
 
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
 
using namespace std;
//~ using namespace __gnu_pbds;

#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vv vector
#define mem(arr, v) memset(arr, v, sizeof arr)
//~ #define int long long
#define degub(x) cout<<#x<<" : "<<x<<"\n"
#define GG cout<<"here\n";
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update> ordered_set;
 
const int N = 1e3+5;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, s, t, q, ans, res, a[N][N];
int ch[2][2] = {{-1, 1}, {1, -1}};
int cnt[N+N];

void solve(int t_case){
	cin>>n>>m;
	
	for(int i=0;i<=n+1;i++) for(int j=0;j<=m+1;j++) a[i][j] = 1;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++) cin>>a[i][j], cnt[i+j] += !a[i][j];
	
	queue<pii> qq;
	//~ auto check = [&](int i, int j){ return (i >= 1 && i <= n && j >= 1 && j <= m); };
	auto bfs = [&](){
		while(!qq.empty()){
			pii u = qq.front(); qq.pop();
			for(int i=0;i<2;i++){
				pii tt = u; tt.ff += ch[i][0], tt.ss += ch[i][1];
				if(a[tt.ff][tt.ss]){
					if(umax(a[tt.ff][u.ss], 1)) cnt[tt.ff+u.ss]--, qq.push({tt.ff, u.ss});
					if(umax(a[u.ff][tt.ss], 1)) cnt[u.ff+tt.ss]--, qq.push({u.ff, tt.ss});
				}
			}
		}
	}; 
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(a[i][j]) qq.push({i, j});
		}
	} bfs();
	
	//~ for(int i=1;i<=n;i++) { for(int j=1;j<=m;j++) cout<<a[i][j]<<" "; cout<<"\n"; }
	
	cin>>q;
	while(q--){
		int i, j; cin>>i>>j;
		if(a[i][j]) { cout<<1<<"\n"; continue; }
		if(cnt[i+j] == 1) { cout<<0<<"\n"; continue; }
		cnt[i+j]--, a[i][j] = 1, qq.push({i, j}); bfs();
		cout<<1<<"\n";
	}
}

signed main(){
	NeedForSpeed
	if(MULTI){
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} else solve(1);
	return 0;
}

Compilation message (stderr)

chameleon.cpp: In function 'void usaco(std::string)':
chameleon.cpp:34:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chameleon.cpp:35:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |  freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccmhM8yx.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccyDRJxx.o:chameleon.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccmhM8yx.o: in function `main':
grader.cpp:(.text.startup+0x1b9): undefined reference to `Solve(int)'
collect2: error: ld returned 1 exit status