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36 lines
1.2 KiB
C++

#define _CRT_SECURE_NO_WARNINGS
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
#include <bits/stdc++.h>
using namespace std;
const int N = 1050;
char a[N][N];
int main()
{
int n, m;
scanf("%d%d", &n, &m);
for (int i = 0; i < n; i++)
scanf("%s", a + i);
for (int i = 0; i < N; i++)
for (int j = 0; j < i; j++)
swap(a[i][j], a[j][i]);
long long ans = 0;
for (int i = 0; i < n; i++)
for (int l = 1; l <= (n - i) / 3; l++)
for (int j = 0; j < m; j++)
{
bool flag = a[j][i] != a[j][i + l] && a[j][i + l] != a[j][i + l + l];
for (int t = 0; t < 3; t++)
for (int k = 0; k < l && flag; k++)
if (a[j][i + l * t] != a[j][i + l * t + k])
flag = false;
int rmost = j;
while (flag && memcmp(a[j] + i, a[rmost] + i, l * 3) == 0) rmost++;
if (rmost != j)
{
ans += (rmost - j) * (rmost - j + 1) / 2;
j = rmost - 1;
}
}
cout << ans;
return 0;
}