#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<ll,ll>
ll r,c,d,w;
const int N = 5e5+1;
char b[N][N];
ll qs[N][N];
vector<pii> mush;
int main()
{
cin >> r >> c >> d >> w;
for(int i=1;i<=r;++i)
{
for(int j=1;j<=c;++j)
{
cin >> b[i][j];
if(b[i][j] == 'S') qs[i][j] = 1;
if(b[i][j] == 'M') mush.push_back({i,j});
}
}
for(int i=1;i<=r;++i)
{
for(int j=1;j<=c;++j)
{
qs[i][j] += qs[i-1][j]+qs[i][j-1]-qs[i-1][j-1];
}
}
ll cnt = 0;
for(pii xy : mush)
{
ll x,y;
tie(x,y) = xy;
ll mx = min(r,x+d),mnx = max((ll)1,x-d);
ll my = min(c,y+d),mny = max((ll)1,y-d);
ll spring = qs[mx][my]-qs[mx][mny-1]-qs[mnx-1][my]+qs[mnx-1][mny-1];
if(spring >= w) ++cnt;
}
cout << cnt;
return 0;
}
Compilation message
/usr/bin/ld: failed to convert GOTPCREL relocation; relink with --no-relax
collect2: error: ld returned 1 exit status
