#define wiwihorz
#include <bits/stdc++.h>
//#include "rainbow.h"
#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define all(x) x.begin(), x.end()
#define INF 1000000000
using namespace std;
#define ll long long int
#define pii pair<ll, ll>
#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else
#define print(...) 0
#define vprint(...) 0
#endif
#define x first
#define y second
namespace solver1 {
ll n, m, Sr, Sc, op; string s;
vector<vector<ll>> row1, col1;
vector<vector<pii>> row2, col2;
unordered_map<char, pii> mp = {
{'N', {-1, 0}}, {'S', {1, 0}},
{'E', {0, 1}}, {'W', {0, -1}}
};
void init(int R, int C, int sr, int sc, int M, char *S) {
n = R, m = C, Sr = sr, Sc = sc, op = M, s = string(S);
row1.assign(n + 1, vector<ll>());
row2.assign(n + 1, vector<pii>());
col1.assign(m + 1, vector<ll>());
col2.assign(m + 1, vector<pii>());
pii cur = {Sr, Sc};
row1[cur.x].push_back(cur.y);
col1[cur.y].push_back(cur.x);
for(auto i : s) {
cur = {cur.x + mp[i].x, cur.y + mp[i].y};
row1[cur.x].push_back(cur.y);
col1[cur.y].push_back(cur.x);
}
rep(i, 1, n) {
sort(all(row1[i]));
row1[i].resize(unique(all(row1[i])) - row1[i].begin());
ll cc = -1, val = 0;
for(auto j : row1[i]) {
if(cc + 1 != j) {
if(val) row2[i].push_back({cc, val});
row2[i].push_back({j, j}), val = j;
}
cc = j;
}
if(cc != -1)row2[i].push_back({cc, val});
}
rep(i, 1, m) {
sort(all(col1[i]));
col1[i].resize(unique(all(col1[i])) - col1[i].begin());
ll cc = -1, val = 0;
for(auto j : col1[i]) {
if(cc + 1 != j) {
if(val) col2[i].push_back({cc, val});
col2[i].push_back({j, j}), val = j;
}
cc = j;
}
if(cc != -1)col2[i].push_back({cc, val});
}
return;
}
ll area(int u, int d, int l, int r) {
ll ans = 0;
rep(i, u, d) {
int L = upper_bound(row1[i].begin(), row1[i].end(), l - 1) - row1[i].begin();
int R = upper_bound(row1[i].begin(), row1[i].end(), r) - row1[i].begin();
ans += R - L;
}
return ans;
}
bool occ(int x, int y) {
int id = lower_bound(row1[x].begin(), row1[x].end(), y) - row1[x].begin();
return id < row1[x].size() && row1[x][id] == y;
}
ll count_row(int id, int L, int R) {
ll lid = lower_bound(row2[id].begin(), row2[id].end(), pii(L, -INF)) - row2[id].begin();
ll rid = upper_bound(row2[id].begin(), row2[id].end(), pii(R, INF)) - row2[id].begin() - 1;
if(lid > rid) return 0;
if(lid && row2[id][lid - 1].y == row2[id][lid].y) lid --;
if(rid + 1 < row2[id].size() && row2[id][rid + 1].y == row2[id][rid].y) rid ++;
assert((rid - lid + 1) % 2 == 0);
return (rid - lid + 1) / 2;
}
ll count_col(int id, int L, int R) {
ll lid = lower_bound(col2[id].begin(), col2[id].end(), pii(L, -INF)) - col2[id].begin();
ll rid = upper_bound(col2[id].begin(), col2[id].end(), pii(R, INF)) - col2[id].begin() - 1;
if(lid > rid) return 0;
if(lid && col2[id][lid - 1].y == col2[id][lid].y) lid --;
if(rid + 1 < col2[id].size() && col2[id][rid + 1].y == col2[id][rid].y) rid ++;
assert((rid - lid + 1) % 2 == 0);
return (rid - lid + 1) / 2;
}
int colour(int ar, int ac, int br, int bc) {
int u = min(ar, br), d = max(ar, br);
int l = min(ac, bc), r = max(ac, bc);
ll count = area(u, d, l, r);
if(!count) return 1;
if(count == ((d - u + 1) * (r - l + 1))) return 0;
ll ans = count_row(u, l, r - 1) + count_row(d, l + 1, r) +
count_col(l, u + 1, d) + count_col(r, u, d - 1);
if(occ(u, r - 1) && occ(u, r)) ans --;
if(occ(d - 1, r) && occ(d, r)) ans --;
if(occ(d, l) && occ(d, l + 1)) ans --;
if(occ(u, l) && occ(u + 1, l)) ans --;
return (ans ? ans : 1);
}
};
using namespace solver1;
/*signed main() {
// ios::sync_with_stdio(false), cin.tie(0);
int n, m, sr, sc, op, q; char* s;
cin >> n >> m >> sr >> sc >> op >> s;
init(n, m, sr, sc, op, s);
cin >> q;
while(q--) {
int a, b, c, d;
cin >> a >> b >> c >> d;
cout << colour(a, b, c, d) << "\n";
}
return 0;
} */
Compilation message
rainbow.cpp:13:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
13 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
| ^~~~
rainbow.cpp:13:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
13 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
| ^~~~
rainbow.cpp: In function 'bool solver1::occ(int, int)':
rainbow.cpp:84:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
84 | return id < row1[x].size() && row1[x][id] == y;
| ~~~^~~~~~~~~~~~~~~~
rainbow.cpp: In function 'long long int solver1::count_row(int, int, int)':
rainbow.cpp:91:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
91 | if(rid + 1 < row2[id].size() && row2[id][rid + 1].y == row2[id][rid].y) rid ++;
| ~~~~~~~~^~~~~~~~~~~~~~~~~
rainbow.cpp: In function 'long long int solver1::count_col(int, int, int)':
rainbow.cpp:100:14: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
100 | if(rid + 1 < col2[id].size() && col2[id][rid + 1].y == col2[id][rid].y) rid ++;
| ~~~~~~~~^~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cc23zXLD.o: in function `main':
grader.cpp:(.text.startup+0xed): undefined reference to `init(int, int, int, int, int, char*)'
/usr/bin/ld: grader.cpp:(.text.startup+0x167): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
