#ifndef CPL_TEMPLATE
#define CPL_TEMPLATE
/*
Normie's Template v2.5
Changes:
Added warning against using pragmas on USACO.
*/
// Standard library in one include.
#include <bits/stdc++.h>
using namespace std;
// ordered_set library.
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set(el) tree<el,null_type,less<el>,rb_tree_tag,tree_order_statistics_node_update>
// AtCoder library. (Comment out these two lines if you're not submitting in AtCoder.) (Or if you want to use it in other judges, run expander.py first.)
//#include <atcoder/all>
//using namespace atcoder;
//Pragmas (Comment out these three lines if you're submitting in szkopul or USACO.)
// #pragma comment(linker, "/stack:200000000")
// #pragma GCC optimize("Ofast,unroll-loops,tree-vectorize")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//File I/O.
#define FILE_IN "cseq.inp"
#define FILE_OUT "cseq.out"
#define ofile freopen(FILE_IN,"r",stdin);freopen(FILE_OUT,"w",stdout)
//Fast I/O.
#define fio ios::sync_with_stdio(0);cin.tie(0)
#define nfio cin.tie(0)
#define endl "\n"
//Order checking.
#define ord(a,b,c) ((a>=b)and(b>=c))
//min/max redefines, so i dont have to resolve annoying compile errors.
#define min(a,b) (((a)<(b))?(a):(b))
#define max(a,b) (((a)>(b))?(a):(b))
// Fast min/max assigns to use with AVX.
// Requires g++ 9.2.0.
template<typename T>
__attribute__((always_inline)) void chkmin(T& a, const T& b) {
a=(a<b)?a:b;
}
template<typename T>
__attribute__((always_inline)) void chkmax(T& a, const T& b) {
a=(a>b)?a:b;
}
//Constants.
#define MOD (ll(998244353))
#define MAX 300001
#define mag 320
const long double PI=3.14159265358979;
//Pairs and 3-pairs.
#define p1 first
#define p2 second.first
#define p3 second.second
#define fi first
#define se second
#define pii(element_type) pair<element_type,element_type>
#define piii(element_type) pair<element_type,pii(element_type)>
//Quick power of 2.
#define pow2(x) (ll(1)<<x)
//Short for-loops.
#define ff(i,__,___) for(int i=__;i<=___;i++)
#define rr(i,__,___) for(int i=__;i>=___;i--)
//Typedefs.
#define bi BigInt
typedef long long ll;
typedef long double ld;
typedef short sh;
// Binpow and stuff
ll BOW(ll a, ll x, ll p)
{
if (!x) return 1;
ll res=BOW(a,x/2,p);
res*=res;
res%=p;
if (x%2) res*=a;
return res%p;
}
ll INV(ll a, ll p)
{
return BOW(a,p-2,p);
}
//---------END-------//
#endif
vector<int> vec;
int n,m,i,j,k,t,t1,u,v,a,b;
int s[5000001];
char c;
ll res;
int par[5000001];
int h[5000001];
int typ[5000001];
int cntb, cntn;
int pu,pv;
int get_par(int x) {
if (par[x]==x) return x;
else return par[x]=get_par(x);
}
int merg(int u, int v) {
pu=par[u];
pv=par[v];
if (pu-pv) {
if (h[pu]>h[pv]) {
par[pv]=pu;
return -1;
}
else if (h[pu]<h[pv]) {
par[pu]=pv;
return 1;
}
else {
par[pu]=pv;
h[pv]++;
return 1;
}
}
else {
return 0;
}
}
vector<piii(int)> el,er;
void solve(int l, int r) {
if (l==r) {
for (i=0;i<m;i++) if (s[l*m+i]) res++;
for (i=0;i<m-1;i++) if (s[l*m+i]&s[l*m+i+1]) res--;
}
else {
int mid=(l+r)/2;
for (i=l*m;i<r*m+m;i++) {
par[i]=i;
h[i]=0;
typ[i]=-1;
}
for (i=0;i<m;i++) {
typ[mid*m+i+m]=typ[mid*m+i]=i;
}
el.clear();
er.clear();
cntb=0;
cntn=0;
for (i=mid;i>=l;i--) for (j=0;j<m;j++) {
if (s[i*m+j]) {
if (i!=mid) {
cntn++;
if (s[i*m+j+m]) {
u=merg(i*m+j,i*m+j+m);
if (u) {
if (typ[pu]==-1) {
if (typ[pv]==-1) {
a=-1;
}
else {
a=typ[pv];
}
cntn--;
}
else {
if (typ[pv]==-1) {
a=typ[pv];
cntn--;
}
else {
el.push_back({i,{typ[pu],typ[pv]}});
a=typ[pv];
cntb--;
}
}
if (u==-1) typ[pu]=a; else typ[pv]=a;
}
}
}
else {
cntb++;
}
if (j) {
if (s[i*m+j-1]) {
u=merg(i*m+j,i*m+j-1);
if (u) {
if (typ[pu]==-1) {
if (typ[pv]==-1) {
a=-1;
}
else {
a=typ[pv];
}
cntn--;
}
else {
if (typ[pv]==-1) {
a=typ[pv];
cntn--;
}
else {
el.push_back({i,{typ[pu],typ[pv]}});
a=typ[pv];
cntb--;
}
}
if (u==-1) typ[pu]=a; else typ[pv]=a;
}
}
}
}
res+=(ll)cntn*(r-mid);
}
for (i=mid+1;i<=r;i++) for (j=0;j<m;j++) {
if (s[i*m+j]) {
if (i!=mid+1) {
cntn++;
if (s[i*m+j-m]) {
u=merg(i*m+j,i*m+j-m);
if (u) {
if (typ[pu]==-1) {
if (typ[pv]==-1) {
a=-1;
}
else {
a=typ[pv];
}
cntn--;
}
else {
if (typ[pv]==-1) {
a=typ[pv];
cntn--;
}
else {
er.push_back({i,{typ[pu],typ[pv]}});
a=typ[pv];
cntb--;
}
}
if (u==-1) typ[pu]=a; else typ[pv]=a;
}
}
}
else {
cntb++;
}
if (j) {
if (s[i*m+j-1]) {
u=merg(i*m+j,i*m+j-1);
if (u) {
if (typ[pu]==-1) {
if (typ[pv]==-1) {
a=-1;
}
else {
a=typ[pv];
}
cntn--;
}
else {
if (typ[pv]==-1) {
a=typ[pv];
cntn--;
}
else {
er.push_back({i,{typ[pu],typ[pv]}});
a=typ[pv];
cntb--;
}
}
if (u==-1) typ[pu]=a; else typ[pv]=a;
}
}
}
}
res+=(ll)cntn*(mid-l+1);
}
el.push_back({l-1,{-1,-1}});
er.push_back({r+1,{-1,-1}});
sort(el.begin(), el.end(), greater<piii(int)>());
sort(er.begin(), er.end());
a=0;
for (i=0;i<m;i++) if (s[mid*m+i]|s[mid*m+i+m]) a++;
for (i=0;i<el.size()-1;i++) {
for (j=0;j<m;j++) {
par[j]=j; h[j]=0;
}
b=0;
for (j=0;j<i;j++) {
if (merg(el[j].p2,el[j].p3)) b++;
}
for (j=0;j<er.size()-1;j++) {
if (merg(er[j].p2,er[j].p3)) b++;
res+=(a-b)*(el[i].p1-el[i+1].p1)*(er[j+1].p1-er[j].p1);
}
}
solve(l,mid);
solve(mid+1,r);
}
}
int main()
{
fio;
cin>>n>>m;
for (i=0;i<n;i++) for (j=0;j<m;j++) {
cin>>c;
s[i*m+j]=c-48;
}
solve(0,n-1);
cout<<res;
}
Compilation message
raspad.cpp: In function 'void solve(int, int)':
raspad.cpp:304:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
304 | for (i=0;i<el.size()-1;i++) {
| ~^~~~~~~~~~~~
raspad.cpp:312:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
312 | for (j=0;j<er.size()-1;j++) {
| ~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
336 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
336 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
301 ms |
11924 KB |
Output is correct |
| 2 |
Incorrect |
363 ms |
25420 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
336 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
