CODING SOLUTION HELP

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Updated: May 13, 2026 at 8:07 AM

CODING SOLUTION HELP

@coding_solution_help is a dedicated channel for Coding and Programming with regular updates in Coding and Programming

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CODING SOLUTION HELP

May 26, 2026, 09:30 AM

#include 
using namespace std;

int main() {
int x, y;
cin >> x >> y;
vector> z(x, vector(y));

for (int i = 0; i < x; ++i) {
for (int j = 0; j < y; ++j) {
cin >> z[i][j];
}
}

int w;
cin >> w;

map>> a;
set b;
for (int i = 0; i < x; ++i) {
for (int j = 0; j < y; ++j) {
int c = z[i][j];
a[c].emplace_back(i, j);
b.insert(c);
}
}

set d;
for (int i = 0; i < x; ++i) {
vector e;
for (int j = 0; j < y; ++j) {
if (z[i][j] == w) {
e.push_back(j);
}
}
if (!e.empty()) {
int f = *max_element(e.begin(), e.end());
for (int j = f + 1; j < y; ++j) {
int g = z[i][j];
if (g != w) {
d.insert(g);
}
}
}
}

set h = b;
d.erase(w);
int i = 0;
for (auto j = d.begin(); j != d.end(); ++j) {
if (h.find(*j) != h.end()) {
h.erase(*j);
i++;
}
}

auto k = [&](const set& l) -> set {
set m;
for (auto& n : l) {
for (auto& [o, p] : a[n]) {
if (o == x - 1) {
m.insert(n);
break;
}
}
}

queue q;
for (auto& r : m) {
q.push(r);
}
while (!q.empty()) {
int s = q.front();
q.pop();
for (auto& t : l) {
if (m.find(t) != m.end()) continue;
bool u = false;
for (auto& [v, w] : a[t]) {
if (v + 1 < x) {
int x = z[v + 1][w];
if (m.find(x) != m.end()) {
u = true;
break;
}
}
}
if (u) {
m.insert(t);
q.push(t);
}
}
}
return m;
};

while (true) {
set y = k(h);
set z;
for (auto& aa : h) {
if (y.find(aa) == y.end()) {
z.insert(aa);
}
}
if (z.empty()) break;
for (auto& bb : z) {
h.erase(bb);
i++;
}
}

cout << i;

return 0;
}



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