#include<bits/stdc++.h>
#define MAXN 407
using namespace std;
int n,m,pr[MAXN][MAXN],nxt[MAXN][MAXN];
int a[MAXN][MAXN],last,ans;
int maxs[MAXN][MAXN][MAXN],bro[MAXN][MAXN][MAXN];
int pref[MAXN][MAXN][MAXN];
bool check(int i,int j,int l,int r){
for(int k=i;k<=j;k++){
if(bro[k][l][r]>=a[k][l-1] or bro[k][l][r]>=a[k][r+1])return false;
}
return true;
}
long long count_rectangles(vector< vector<int> > A){
n=int(A.size()); m=int(A[0].size());
for(int i=1;i<=n;i++){
for(int f=1;f<=m;f++){
a[i][f]=A[i-1][f-1];
}
}
for(int i=1;i<=m;i++){
for(int f=1;f<=n;f++){
maxs[i][f][f]=a[f][i];
for(int k=f+1;k<=n;k++){
maxs[i][f][k]=max(maxs[i][f][k-1],a[k][i]);
}
}
}
for(int i=1;i<=n;i++){
for(int f=1;f<=m;f++){
bro[i][f][f]=a[i][f];
for(int k=f+1;k<=m;k++){
bro[i][f][k]=max(bro[i][f][k-1],a[i][k]);
}
}
}
for(int i=1;i<=n;i++){
for(int f=1;f<=m;f++){
for(int k=f;k<=m;k++){
pref[i][f][k]=pref[i-1][f][k];
}
}
for(int f=2;f<=m-1;f++){
pr[i][f]=0; nxt[i][f]=m+1;
for(int k=f-1;k>=1;k--){
if(a[i][k]>a[i][f]){pr[i][f]=k;break;}
}
for(int k=f+1;k<=m;k++){
if(a[i][k]>a[i][f]){nxt[i][f]=k;break;}
}
pref[i][pr[i][f]][nxt[i][f]]=pref[i-1][pr[i][f]][nxt[i][f]]+1;
}
}
for(int i=2;i<=n-1;i++){
for(int f=i;f<=n-1;f++){
last=2;
for(int k=2;k<=m-1;k++){
if(maxs[k][i][f]<a[i-1][k] and maxs[k][i][f]<a[f+1][k])continue;
for(int p=last;p<=k-1;p++){
if(pr[f][p]+1<last or nxt[f][p]-1>k-1)continue;
//if(pref[f][pr[f][p]][nxt[f][p]] - pref[i-1][pr[f][p]][nxt[f][p]] == f-i+1)ans++;
if(check(i,f,pr[f][p]+1,nxt[f][p]-1))ans++;
}
last=k+1;
}
for(int p=last;p<=m-1;p++){
if(pr[f][p]+1<last or nxt[f][p]-1>m-1)continue;
//if(pref[f][pr[f][p]][nxt[f][p]] - pref[i-1][pr[f][p]][nxt[f][p]] == f-i+1)ans++;
if(check(i,f,pr[f][p]+1,nxt[f][p]-1))ans++;
}
}
}
return ans;
}
/*
int main(){
cout<<count_rectangles({{4, 8, 7, 5, 6},
{7, 4, 10, 3, 5},
{9, 7, 20, 14, 2},
{9, 14, 7, 3, 6},
{5, 7, 5, 2, 7},
{4, 5, 13, 5, 6}})<<"\n";
return 0;
}
*/
Compilation message
/usr/bin/ld: /tmp/ccOGrMLJ.o: in function `main':
grader.cpp:(.text.startup+0x385): undefined reference to `min_distance(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, int, int)'
collect2: error: ld returned 1 exit status
