This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
, point b) {return a.x<b.x;}
bool cmpy(point a, point b) {return a.y<b.y;}
int map[4][305000];
int arr[305000], ans[300500], ytoz[300500];
vector<int> elem[805000], maxtree[806000];
point p[300500];
void init(int s, int e, int node){
if(s==e) elem[node].push_back(ytoz[s]);
else{
int mid = (s+e)/2;
init(s, mid, node*2);
init(mid+1, e, node*2+1);
int pt1 = 0, pt2 = 0;
while(pt1<elem[node*2].size()&&pt2<elem[node*2+1].size()){
if(elem[node*2][pt1]<elem[node*2+1][pt2]) elem[node].push_back(elem[node*2][pt1++]);
else if(elem[node*2][pt1]>elem[node*2+1][pt2]) elem[node].push_back(elem[node*2+1][pt2++]);
else{
elem[node].push_back(elem[node*2][pt1++]);
pt2++;
}
}
for(int i=pt1; i<elem[node*2].size(); i++) elem[node].push_back(elem[node*2][i]);
for(int i=pt2; i<elem[node*2+1].size(); i++) elem[node].push_back(elem[node*2+1][i]);
}
}
void insert_node(int pos, int val, int s, int e, int node, int nodez){
if(pos<s||pos>e) return;
maxtree[node][nodez] = maxtree[node][nodez]<val?val:maxtree[node][nodez];
if(s!=e){
insert_node(pos, val, s, (s+e)/2, node, nodez*2);
insert_node(pos, val, (s+e)/2+1, e, node, nodez*2+1);
}
}
void insert(int y, int z, int val, int s, int e, int node, int m){
if(y<s||y>e) return;
int coord = lower_bound(elem[node].begin(), elem[node].end(), z)-elem[node].begin()+1;
insert_node(coord, val, 1, elem[node].size(), node, 1);
if(s!=e){
insert(y,z,val,s,(s+e)/2,node*2,m);
insert(y,z,val,(s+e)/2+1,e,node*2+1,m);
}
}
int getmax_node(int z1, int z2, int s, int e, int node, int nodez){
if(e<z1||s>z2) return -1;
else if(z1<=s&&e<=z2) return maxtree[node][nodez];
else{
int a = getmax_node(z1, z2, s, (s+e)/2, node, nodez*2);
int b = getmax_node(z1, z2, (s+e)/2+1, e, node, nodez*2+1);
return a<b?b:a;
}
}
int getmax(int y1, int y2, int z1, int z2, int s, int e, int node, int m){
int c1 = lower_bound(elem[node].begin(), elem[node].end(), z1)-elem[node].begin()+1;
int c2 = lower_bound(elem[node].begin(), elem[node].end(), z2)-elem[node].begin()+1;
if(e<y1||s>y2) return -1;
else if(y1<=s&&e<=y2) return getmax_node(c1, c2, 1, elem[node].size(), node, 1);
else{
int a = getmax(y1, y2, z1, z2, s, (s+e)/2, node*2, m);
int b = getmax(y1, y2, z1, z2, (s+e)/2+1, e, node*2+1, m);
return a>b?a:b;
}
}
int main() {
int n,m;
cin.sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin>>n>>m;
for(int i=1; i<=n; i++){
for(int j=1; j<=m; j++){
cin>>arr[j];
//arr[j] = j;
map[i][j] = arr[j];
}
sort(arr+1, arr+m+1);
for(int j=1; j<=m; j++){
map[i][j] = lower_bound(arr+1, arr+m+1, map[i][j])-arr;
}
}
for(int j=1; j<=m; j++) {
p[j].x = map[1][j]; p[j].y = map[2][j]; p[j].z = (n==2)?1:map[3][j];
ytoz[p[j].y] = p[j].z;
}
sort(p+1, p+m+1, cmpx);
init(1, m, 1);
for(int i=1; i<=4*m; i++){
if(elem[i].size()!=0) maxtree[i].resize(4*elem[i].size()+1);
}
int ans = -123;
for(int i=1; i<=m; i++){
int t = getmax(1, p[i].y, 1, p[i].z, 1, m, 1, m)+1;
if(ans<t) ans = t;
//cout<<t<<" ";
insert(p[i].y, p[i].z, t, 1, m, 1, m);
}
cout<<ans;
}
Compilation message (stderr)
matrix.cpp:1:1: error: expected unqualified-id before ',' token
1 | , point b) {return a.x<b.x;}
| ^
matrix.cpp:1:9: error: expected constructor, destructor, or type conversion before 'b'
1 | , point b) {return a.x<b.x;}
| ^
matrix.cpp:2:11: error: 'point' was not declared in this scope; did you mean 'int'?
2 | bool cmpy(point a, point b) {return a.y<b.y;}
| ^~~~~
| int
matrix.cpp:2:20: error: 'point' was not declared in this scope; did you mean 'int'?
2 | bool cmpy(point a, point b) {return a.y<b.y;}
| ^~~~~
| int
matrix.cpp:2:27: error: expression list treated as compound expression in initializer [-fpermissive]
2 | bool cmpy(point a, point b) {return a.y<b.y;}
| ^
matrix.cpp:5:1: error: 'vector' does not name a type
5 | vector<int> elem[805000], maxtree[806000];
| ^~~~~~
matrix.cpp:6:1: error: 'point' does not name a type; did you mean 'int'?
6 | point p[300500];
| ^~~~~
| int
matrix.cpp: In function 'void init(int, int, int)':
matrix.cpp:9:12: error: 'elem' was not declared in this scope
9 | if(s==e) elem[node].push_back(ytoz[s]);
| ^~~~
matrix.cpp:18:15: error: 'elem' was not declared in this scope
18 | while(pt1<elem[node*2].size()&&pt2<elem[node*2+1].size()){
| ^~~~
matrix.cpp:31:22: error: 'elem' was not declared in this scope
31 | for(int i=pt1; i<elem[node*2].size(); i++) elem[node].push_back(elem[node*2][i]);
| ^~~~
matrix.cpp:32:22: error: 'elem' was not declared in this scope
32 | for(int i=pt2; i<elem[node*2+1].size(); i++) elem[node].push_back(elem[node*2+1][i]);
| ^~~~
matrix.cpp: In function 'void insert_node(int, int, int, int, int, int)':
matrix.cpp:41:3: error: 'maxtree' was not declared in this scope
41 | maxtree[node][nodez] = maxtree[node][nodez]<val?val:maxtree[node][nodez];
| ^~~~~~~
matrix.cpp: In function 'void insert(int, int, int, int, int, int, int)':
matrix.cpp:52:27: error: 'elem' was not declared in this scope
52 | int coord = lower_bound(elem[node].begin(), elem[node].end(), z)-elem[node].begin()+1;
| ^~~~
matrix.cpp:52:15: error: 'lower_bound' was not declared in this scope
52 | int coord = lower_bound(elem[node].begin(), elem[node].end(), z)-elem[node].begin()+1;
| ^~~~~~~~~~~
matrix.cpp: In function 'int getmax_node(int, int, int, int, int, int)':
matrix.cpp:64:32: error: 'maxtree' was not declared in this scope
64 | else if(z1<=s&&e<=z2) return maxtree[node][nodez];
| ^~~~~~~
matrix.cpp: In function 'int getmax(int, int, int, int, int, int, int, int)':
matrix.cpp:77:24: error: 'elem' was not declared in this scope
77 | int c1 = lower_bound(elem[node].begin(), elem[node].end(), z1)-elem[node].begin()+1;
| ^~~~
matrix.cpp:77:12: error: 'lower_bound' was not declared in this scope
77 | int c1 = lower_bound(elem[node].begin(), elem[node].end(), z1)-elem[node].begin()+1;
| ^~~~~~~~~~~
matrix.cpp: In function 'int main()':
matrix.cpp:95:3: error: 'cin' was not declared in this scope
95 | cin.sync_with_stdio(false);
| ^~~
matrix.cpp:97:3: error: 'cout' was not declared in this scope
97 | cout.tie(nullptr);
| ^~~~
matrix.cpp:109:5: error: 'sort' was not declared in this scope; did you mean 'short'?
109 | sort(arr+1, arr+m+1);
| ^~~~
| short
matrix.cpp:113:19: error: 'lower_bound' was not declared in this scope
113 | map[i][j] = lower_bound(arr+1, arr+m+1, map[i][j])-arr;
| ^~~~~~~~~~~
matrix.cpp:120:5: error: 'p' was not declared in this scope
120 | p[j].x = map[1][j]; p[j].y = map[2][j]; p[j].z = (n==2)?1:map[3][j];
| ^
matrix.cpp:125:8: error: 'p' was not declared in this scope
125 | sort(p+1, p+m+1, cmpx);
| ^
matrix.cpp:125:20: error: 'cmpx' was not declared in this scope; did you mean 'cmpy'?
125 | sort(p+1, p+m+1, cmpx);
| ^~~~
| cmpy
matrix.cpp:125:3: error: 'sort' was not declared in this scope; did you mean 'short'?
125 | sort(p+1, p+m+1, cmpx);
| ^~~~
| short
matrix.cpp:131:8: error: 'elem' was not declared in this scope
131 | if(elem[i].size()!=0) maxtree[i].resize(4*elem[i].size()+1);
| ^~~~
matrix.cpp:131:27: error: 'maxtree' was not declared in this scope
131 | if(elem[i].size()!=0) maxtree[i].resize(4*elem[i].size()+1);
| ^~~~~~~