#include <bits/stdc++.h>
#include "vision.h"
using namespace std;
using ll = long long;
using vi = vector<int>;
#define pb push_back
#define rsz resize
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
using pi = pair<int,int>;
#define f first
#define s second
#define mp make_pair
void construct_network(int H, int W, int K) {
vi ups;
for (int y = 0; y < W; y++) {
pi st = mp(0, y);
vi diag;
while (st.f < H && st.s < W) {
diag.pb(H * st.f + st.s);
++st.f, ++st.s;
}
ups.pb(add_or(diag));
}
for (int x = 1; x < H; x++) {
pi st = mp(x, 0);
vi diag;
while (st.f < H && st.s < W) {
diag.pb(H * st.f + st.s);
++st.f, ++st.s;
}
ups.pb(add_or(diag));
}
vi downs;
for (int y = 0; y < W; y++) {
pi st = mp(0, y);
vi diag;
while (st.f >= 0 && st.s >= 0) {
diag.pb(H * st.f + st.s);
--st.f, --st.s;
}
downs.pb(add_or(diag));
}
for (int x = 1; x < H; x++) {
pi st = mp(x, W - 1);
vi diag;
while (st.f >= 0 && st.s >= 0) {
diag.pb(H * st.f + st.s);
--st.f, --st.s;
}
downs.pb(add_or(diag));
}
vi psup(sz(ups));
for (int i = 0; i < sz(ups); i++) {
if (i == 0) {
psup[i] = ups[i];
}
else {
psup[i] = add_xor({ups[i], psup[i - 1]});
}
}
vi pdown(sz(downs));
for (int i = 0; i < sz(downs); i++) {
if (i == 0) {
pdown[i] = downs[i];
}
else {
pdown[i] = add_xor({downs[i], pdown[i - 1]});
}
}
int upok = 0, downok = 0;
for (int i = 0; i < sz(ups) - K + 1; i++) {
vi curr;
for (int j = i; j < i + K; j++) {
curr.pb(psup[j]);
}
if (i == 0) upok = add_and(curr);
else upok = add_or({upok, add_and(curr)});
}
for (int i = 0; i < sz(downs) - K + 1; i++) {
vi curr;
for (int j = i; j < i + K; j++) {
curr.pb(pdown[j]);
}
if (i == 0) downok = add_and(curr);
else downok = add_or({downok, add_and(curr)});
}
int NK = K + 1;
int upok2 = 0, downok2 = 0;
for (int i = 0; i < sz(ups) - NK + 1; i++) {
vi curr;
for (int j = i; j < i + NK; j++) {
curr.pb(psup[j]);
}
if (i == 0) upok2 = add_and(curr);
else upok2 = add_or({upok2, add_and(curr)});
}
for (int i = 0; i < sz(downs) - NK + 1; i++) {
vi curr;
for (int j = i; j < i + NK; j++) {
curr.pb(pdown[j]);
}
if (i == 0) downok2 = add_and(curr);
else downok2 = add_or({downok2, add_and(curr)});
}
return add_and({add_or({upok, downok}), add_not(add_or({upok2, downok2}))});
}
Compilation message
vision.cpp: In function 'void construct_network(int, int, int)':
vision.cpp:111:79: error: return-statement with a value, in function returning 'void' [-fpermissive]
return add_and({add_or({upok, downok}), add_not(add_or({upok2, downok2}))});
^
