This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "vision.h"
/// #pragma GCC optimize ("Ofast")
/// #pragma GCC target ("avx2")
/// #pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
using ii = pair<ll, ll>;
using vi = vector<int>;
#define ff first
#define ss second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lb lower_bound
/// #define int ll
const int oo = 1e9 + 7;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {-1, 1, 0, 0};
int n, m; map<ii, int> vis;
int calc(int x, int y) {
return x * m + y;
}
int dist(int x, int y, int xx, int yy) {
return abs(x - xx) + abs(y - yy);
}
void sample(int H, int W, int K) {
n = H, m = W; vector<int> res;
for(int l = 0; l < n; l++) {
for(int i = 0; i < m; i++) {
for(int j = 0; j < n; j++) {
for(int k = 0; k < m; k++) {
int d = dist(l, i, j, k);
int a = calc(l, i), b = calc(j, k);
if(a > b) swap(a, b);
if(d == K && !vis.count({a, b})) {
res.pb(add_and({a, b}));
vis[{a, b}] = 1;
}
}
}
}
}
add_or(res);
}
void tseven(int H, int W, int K) {
n = H, m = W; vector<int> res;
for(int l = 0; l < n; l++) {
for(int i = 0; i < m; i++) {
vector<int> S;
for(int j = 0; j < 4; j++) {
int x = l + nx[j], y = i + ny[j];
if(x >= 0 && x < n && y >= 0 && y < m)
S.pb(calc(x, y));
}
res.pb(add_and({calc(l, i), add_or(S)}));
}
}
add_or(res);
}
void construct_network(int H, int W, int K) {
if(H == 2 && W == 3 && K == 3) {
sample(H, W, K); return;
}
if(K == 1) {
tseven(H, W, K); return;
}
n = H, m = W; vector<int> res;
int curr = n * n * m * m;
if(min(n, m) == 1) {
sample(H, W, K); return;
}
for(int l = 0; l < n; l++) {
for(int i = 0; i < m; i++) {
if(l + i == K) {
res.pb(add_and({0, calc(l, i)}));
}
}
}
add_or(res);
}
Compilation message (stderr)
vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:73:17: warning: unused variable 'curr' [-Wunused-variable]
73 | int curr = n * n * m * m;
| ^~~~
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