#include <bits/stdc++.h>
using namespace std;
using db = long double;
using ll = long long;
using pl = pair<ll, ll>;
using pi = pair<int, int>;
#define vt vector
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(), x.end()
#define size(x) ((int) (x).size())
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define ROF(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define F0R(i, b) FOR (i, 0, b)
#define endl '\n'
const ll INF = 1e18;
const int inf = 1e9;
template<typename... Args> // tuples
ostream& operator<<(ostream& os, tuple<Args...> t) {
apply([&](Args... args) { string dlm = "{"; ((os << dlm << args, dlm = ", "), ...); }, t);
return os << "}";
}
template<typename T, typename V> // pairs
ostream& operator<<(ostream& os, pair<T, V> p) { return os << "{" << p.f << ", " << p.s << "}"; }
template<class T, class = decltype(begin(declval<T>()))> // iterables
typename enable_if<!is_same<T, string>::value, ostream&>::type operator<<(ostream& os, const T& v) {
string dlm = "{";
for (auto& i : v) os << dlm << i, dlm = ", ";
return os << "}";
}
template <typename T, typename... V>
void printer(string pfx, const char *names, T&& head, V&& ...tail) {
int i = 0;
while (names[i] && names[i] != ',') i++;
constexpr bool is_str = is_same_v<decay_t<T>, const char*>;
if (is_str) cerr << " " << head;
else cerr << pfx, cerr.write(names, i) << " = " << head;
if constexpr (sizeof...(tail)) printer(is_str ? "" : ",", names + i + 1, tail...);
else cerr << endl;
}
#ifdef LOCAL
#define dbg(...) printer(to_string(__LINE__) + ": ", #__VA_ARGS__, __VA_ARGS__)
#else
#define dbg(x...)
#define cerr if (0) std::cerr
#endif
const ll mod = 1e9 + 7;
void add(ll& a, ll b) {
a = (a + b) % mod;
}
/*
subtask 1: just do it
subtask 2: find the size of the inner ring, and then math how many extra squares around the outside you are
subtask 3:
*/
ll n, q;
main() {
cin.tie(0)->sync_with_stdio(0);
cin >> n >> q;
vt grid(2 * n + 2, vt<ll>(2 * n + 2));
grid[n][n] = 1;
FOR (_i, 1, n + 1) {
ll i = 2 * _i + 1;
ll x = (i - 2) * (i - 2) + 1;
ll r = n + _i;
ll c = n + _i;
F0R (j, i - 1) r--, grid[r][c] = x++;
F0R (j, i - 1) c--, grid[r][c] = x++;
F0R (j, i - 1) r++, grid[r][c] = x++;
F0R (j, i - 1) c++, grid[r][c] = x++;
}
// F0R (i, 2 * n + 1) {
// F0R (j, 2 * n + 1) {
// const int len = 3;
// string st = to_string(grid[i][j]);
// cerr << string(" ", len - size(st)) << st << " \n"[j == 2 * n];
// }
// }
ROF (i, 0, 2 * n + 1) ROF (j, 0, 2 * n + 1) add(grid[i][j], grid[i + 1][j]);
ROF (i, 0, 2 * n + 1) ROF (j, 0, 2 * n + 1) add(grid[i][j], grid[i][j + 1]);
F0R (i, q) {
int r1, r2, c1, c2;
cin >> c1 >> r2 >> c2 >> r1;
r1 += n, c1 += n, r2 += n, c2 += n;
r1 = 2 * n - r1;
r2 = 2 * n - r2;
ll ans = grid[r1][c1] - grid[r1][c2 + 1] - grid[r2 + 1][c1] + grid[r2 + 1][c2 + 1] + 2 * mod;
cout << (ans % mod) << endl;
}
}
Compilation message
spiral.cpp:71:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
71 | main() {
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
31836 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
33 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
31836 KB |
Output is correct |
| 2 |
Runtime error |
79 ms |
262144 KB |
Execution killed with signal 9 |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
30 ms |
262144 KB |
Execution killed with signal 9 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
49 ms |
31836 KB |
Output is correct |
| 2 |
Runtime error |
33 ms |
262144 KB |
Execution killed with signal 9 |
| 3 |
Halted |
0 ms |
0 KB |
- |
