This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 987654321987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a))
#define MEM_1(a) memset((a),-1,sizeof(a))
#define ALL(a) a.begin(),a.end()
#define COMPRESS(a) sort(ALL(a));a.resize(unique(ALL(a))-a.begin())
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<ld, ld> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<ld> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM = MOD) { ll ret = 1; for (; b; b >>= 1, a = (a*a) % MMM)if (b & 1)ret = (ret*a) % MMM; return ret; }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[] = { -1,-2,1,-2,2,-1,2,1 }, ddy[] = { -2,-1,-2,1,-1,2,1,2 };
int a[1005][1005];
int p[2][1111111];
set<int> LR[1005],UD[1005];
int n,m;
inline int z(int x,int y){return x*(m+2)+y;}
int f(int i,int x){return x==p[i][x]?x:p[i][x]=f(i,p[i][x]);}
void merge(int i,int x,int y){p[i][f(i,x)]=f(i,y);}
int main(){
iota(p[0],p[0]+1111111,0);
iota(p[1],p[1]+1111111,0);
scanf("%d%d",&n,&m);
LR[0].insert(1);
LR[n+1].insert(m);
UD[0].insert(1);
UD[m+1].insert(n);
fup(i,1,n,1){
fup(j,1,m,1){
scanf("%d",a[i]+j);
if(a[i][j]){
LR[i].insert(j);
UD[j].insert(i);
}
}
}
fup(i,1,n,1){
fup(j,0,1,1){
merge(j,z(i,m+1),z(0,1));
merge(j,z(i,0),z(1,0));
}
a[i][0]=a[i][m+1]=1;
}
fup(i,1,m,1){
fup(j,0,1,1){
merge(j,z(0,i),z(0,1));
merge(j,z(n+1,i),z(1,0));
}
a[0][i]=a[n+1][i]=1;
}
fup(x,1,n+1,1){
for(int y:LR[x]){
auto it=LR[x-1].upper_bound(y);
if(it!=LR[x-1].begin()){
it--;
merge(0,z(x,y),z(x-1,*it));
}
if(x!=n+1){
fup(k,0,7,1){
int nx=x+dx[k],ny=y+dy[k];
if(a[nx][ny]){
merge(0,z(x,y),z(nx,ny));
}
}
}
}
}
fup(y,1,m+1,1){
for(int x:UD[y]){
auto it=UD[y-1].upper_bound(x);
if(it!=UD[y-1].begin()){
it--;
merge(1,z(x,y),z(*it,y-1));
}
if(y!=m+1){
fup(k,0,7,1){
int nx=x+dx[k],ny=y+dy[k];
if(a[nx][ny]){
merge(1,z(x,y),z(nx,ny));
}
}
}
}
}
int q;
scanf("%d",&q);
while(q--){
int x,y;
scanf("%d%d",&x,&y);
bool ok=1;
int t=0;
fup(k,0,7,1){
int nx=x+dx[k],ny=y+dy[k];
if(a[nx][ny]){
if(f(0,z(0,1))==f(0,z(nx,ny)))t|=1;
if(f(0,z(1,0))==f(0,z(nx,ny)))t|=2;
}
}
auto it=LR[x-1].upper_bound(y);
if(it!=LR[x-1].begin()){
it--;
int nx=x-1,ny=*it;
if(f(0,z(0,1))==f(0,z(nx,ny)))t|=1;
if(f(0,z(1,0))==f(0,z(nx,ny)))t|=2;
}
it=LR[x+1].lower_bound(y);
if(it!=LR[x+1].end()){
int nx=x+1,ny=*it;
if(f(0,z(0,1))==f(0,z(nx,ny)))t|=1;
if(f(0,z(1,0))==f(0,z(nx,ny)))t|=2;
}
if(t==3)ok=0;
t=0;
fup(k,0,7,1){
int nx=x+dx[k],ny=y+dy[k];
if(a[nx][ny]){
if(f(1,z(0,1))==f(1,z(nx,ny)))t|=1;
if(f(1,z(1,0))==f(1,z(nx,ny)))t|=2;
}
}
it=UD[y-1].upper_bound(x);
if(it!=UD[y-1].begin()){
it--;
int nx=*it,ny=y-1;
if(f(1,z(0,1))==f(1,z(nx,ny)))t|=1;
if(f(1,z(1,0))==f(1,z(nx,ny)))t|=2;
}
it=UD[y+1].lower_bound(x);
if(it!=UD[y+1].end()){
int nx=*it,ny=y+1;
if(f(1,z(0,1))==f(1,z(nx,ny)))t|=1;
if(f(1,z(1,0))==f(1,z(nx,ny)))t|=2;
}
if(t==3)ok=0;
printf("%d\n",ok);
if(ok){
a[x][y]=1;
fup(k,0,7,1){
int nx=x+dx[k],ny=y+dy[k];
if(a[nx][ny]){
merge(0,z(x,y),z(nx,ny));
merge(1,z(x,y),z(nx,ny));
}
}
it=LR[x-1].upper_bound(y);
if(it!=LR[x-1].begin()){
it--;
int nx=x-1,ny=*it;
merge(0,z(x,y),z(nx,ny));
}
it=LR[x+1].lower_bound(y);
if(it!=LR[x+1].end()){
int nx=x+1,ny=*it;
merge(0,z(x,y),z(nx,ny));
}
it=UD[y-1].upper_bound(x);
if(it!=UD[y-1].begin()){
it--;
int nx=*it,ny=y-1;
merge(1,z(x,y),z(nx,ny));
}
it=UD[y+1].lower_bound(x);
if(it!=UD[y+1].end()){
int nx=*it,ny=y+1;
merge(1,z(x,y),z(nx,ny));
}
LR[x].insert(y);
UD[y].insert(x);
}
}
}
Compilation message (stderr)
furniture.cpp: In function 'int main()':
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:58:2: note: in expansion of macro 'fup'
58 | fup(i,1,n,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:59:3: note: in expansion of macro 'fup'
59 | fup(j,1,m,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:67:2: note: in expansion of macro 'fup'
67 | fup(i,1,n,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:68:3: note: in expansion of macro 'fup'
68 | fup(j,0,1,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:74:2: note: in expansion of macro 'fup'
74 | fup(i,1,m,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:75:3: note: in expansion of macro 'fup'
75 | fup(j,0,1,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'x' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:81:2: note: in expansion of macro 'fup'
81 | fup(x,1,n+1,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:89:5: note: in expansion of macro 'fup'
89 | fup(k,0,7,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'y' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:98:2: note: in expansion of macro 'fup'
98 | fup(y,1,m+1,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:106:5: note: in expansion of macro 'fup'
106 | fup(k,0,7,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:122:3: note: in expansion of macro 'fup'
122 | fup(k,0,7,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:144:3: note: in expansion of macro 'fup'
144 | fup(k,0,7,1){
| ^~~
furniture.cpp:10:30: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
| ^
furniture.cpp:168:4: note: in expansion of macro 'fup'
168 | fup(k,0,7,1){
| ^~~
furniture.cpp:53:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
53 | scanf("%d%d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~
furniture.cpp:60:9: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
60 | scanf("%d",a[i]+j);
| ~~~~~^~~~~~~~~~~~~
furniture.cpp:116:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
116 | scanf("%d",&q);
| ~~~~~^~~~~~~~~
furniture.cpp:119:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
119 | scanf("%d%d",&x,&y);
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