oj.uz

답안 #379018

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
379018 2021-03-17T08:28:16 Z fhvirus Chessboard (IZhO18_chessboard) C++17
70 / 100
 2000 ms 492 KB 
// Knapsack DP is harder than FFT.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii; typedef pair<ll, ll> pll;
#define ff first
#define ss second
#define pb emplace_back
#define FOR(i,n) for(int i = 0; i < (n); ++i)
#define FOO(i,a,b) for(int i = (a); i <= (b); ++i)
#define AI(x) begin(x),end(x)
template<class I> bool chmax(I &a, I b){ return a < b ? (a = b, true) : false;}
template<class I> bool chmin(I &a, I b){ return a > b ? (a = b, true) : false;}
#ifdef OWO
#define debug(args...) LKJ("[ " + string(#args) + " ]", args)
void LKJ(){ cerr << endl;}
template<class I, class...T> void LKJ(I&&x, T&&...t){ cerr<<x<<", ", LKJ(t...);}
template<class I> void DE(I a, I b){ while(a < b) cerr << *a << " \n"[next(a) == b], ++a;}
#else
#define debug(...) 0
#define DE(...) 0
#endif
const int N = 1e5 + 1;
int n, k;

void findfac(int n, vector<int> &fac){
	for(int i = 1; i * i <= n; ++i){
		if(n % i != 0) continue;
		fac.pb(i);
		fac.pb(n / i);
	}
	sort(AI(fac));
	fac.erase(unique(AI(fac)), end(fac));
	if(fac.back() == n) fac.pop_back();
}

int32_t main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> k;

	vector<int> facs;
	findfac(n, facs);

	// ca : has top left corner
	// cb : does not
	vector<ll> ca(facs.size());
	vector<ll> cb(facs.size());
	FOR(i,facs.size()){
		int f = facs[i];
		ll nn = n / f;
		ll bc = (nn * nn + 1) / 2;
		ca[i] = bc * f * f;
		cb[i] = 1ll * n * n - ca[i];
	}

	FOR(_,k){
		int x1, y1, x2, y2;
		cin >> x1 >> y1 >> x2 >> y2;
		--x1, --y1, --x2, --y2;
		FOR(i, facs.size()){
			int f = facs[i];
			int lx = (x2 - x1 + 1);
			int ly = (y2 - y1 + 1);
			lx %= f * 2, ly %= f * 2;
			if(lx == 0 or ly == 0) continue;
			int xr = x1 + lx - 1, yr = y1 + ly - 1;

			ll vx = 0, vy = 0;
			int odd = ((x1 / f) & 1);
			FOO(x, x1, xr){
				if(((x / f) & 1) != odd) --vx;
				else ++vx;
			}
			odd = ((y1 / f) & 1);
			FOO(y, y1, yr){
				if(((y / f) & 1) != odd)
					vy -= vx;
				else vy += vx;
			}

			if((x1 / f) + (y1 / f) & 1) vy *= 1;
			else vy *= -1;

			ca[i] += vy;
			cb[i] -= vy;
		}
	}

	DE(AI(facs));
	DE(AI(ca));
	DE(AI(cb));

	cout << min(
		*min_element(AI(ca)),
		*min_element(AI(cb))
	);
	return 0;
}

Compilation message

chessboard.cpp: In function 'int32_t main()':
chessboard.cpp:9:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define FOR(i,n) for(int i = 0; i < (n); ++i)
      |                                   ^
chessboard.cpp:48:2: note: in expansion of macro 'FOR'
   48 |  FOR(i,facs.size()){
      |  ^~~
chessboard.cpp:9:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define FOR(i,n) for(int i = 0; i < (n); ++i)
      |                                   ^
chessboard.cpp:60:3: note: in expansion of macro 'FOR'
   60 |   FOR(i, facs.size()){
      |   ^~~
chessboard.cpp:81:16: warning: suggest parentheses around '+' in operand of '&' [-Wparentheses]
   81 |    if((x1 / f) + (y1 / f) & 1) vy *= 1;
      |       ~~~~~~~~~^~~~~~~~~~
chessboard.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
chessboard.cpp:89:2: note: in expansion of macro 'DE'
   89 |  DE(AI(facs));
      |  ^~
chessboard.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
chessboard.cpp:90:2: note: in expansion of macro 'DE'
   90 |  DE(AI(ca));
      |  ^~
chessboard.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
chessboard.cpp:91:2: note: in expansion of macro 'DE'
   91 |  DE(AI(cb));
      |  ^~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 364 KB Output is correct
2 Correct 11 ms 492 KB Output is correct
3 Correct 20 ms 364 KB Output is correct
4 Correct 17 ms 364 KB Output is correct
5 Correct 25 ms 492 KB Output is correct
6 Correct 14 ms 364 KB Output is correct
7 Correct 3 ms 364 KB Output is correct
8 Correct 14 ms 364 KB Output is correct
9 Correct 38 ms 384 KB Output is correct
10 Correct 23 ms 364 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct

Subtask #4
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 11 ms 364 KB Output is correct
17 Correct 28 ms 364 KB Output is correct
18 Correct 40 ms 364 KB Output is correct
19 Correct 114 ms 364 KB Output is correct
20 Correct 122 ms 384 KB Output is correct
21 Correct 27 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 23 ms 364 KB Output is correct
24 Correct 41 ms 364 KB Output is correct
25 Correct 5 ms 364 KB Output is correct
26 Correct 23 ms 364 KB Output is correct
27 Correct 32 ms 364 KB Output is correct
28 Correct 40 ms 364 KB Output is correct
29 Correct 12 ms 364 KB Output is correct
30 Correct 2 ms 364 KB Output is correct

Subtask #5
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 364 KB Output is correct
2 Correct 11 ms 492 KB Output is correct
3 Correct 20 ms 364 KB Output is correct
4 Correct 17 ms 364 KB Output is correct
5 Correct 25 ms 492 KB Output is correct
6 Correct 14 ms 364 KB Output is correct
7 Correct 3 ms 364 KB Output is correct
8 Correct 14 ms 364 KB Output is correct
9 Correct 38 ms 384 KB Output is correct
10 Correct 23 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 11 ms 364 KB Output is correct
27 Correct 28 ms 364 KB Output is correct
28 Correct 40 ms 364 KB Output is correct
29 Correct 114 ms 364 KB Output is correct
30 Correct 122 ms 384 KB Output is correct
31 Correct 27 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 23 ms 364 KB Output is correct
34 Correct 41 ms 364 KB Output is correct
35 Correct 5 ms 364 KB Output is correct
36 Correct 23 ms 364 KB Output is correct
37 Correct 32 ms 364 KB Output is correct
38 Correct 40 ms 364 KB Output is correct
39 Correct 12 ms 364 KB Output is correct
40 Correct 2 ms 364 KB Output is correct
41 Correct 105 ms 392 KB Output is correct
42 Correct 43 ms 364 KB Output is correct
43 Correct 64 ms 492 KB Output is correct
44 Correct 43 ms 364 KB Output is correct
45 Correct 37 ms 364 KB Output is correct
46 Correct 111 ms 364 KB Output is correct
47 Correct 33 ms 364 KB Output is correct
48 Correct 53 ms 492 KB Output is correct
49 Correct 40 ms 364 KB Output is correct
50 Correct 454 ms 492 KB Output is correct
51 Correct 483 ms 396 KB Output is correct
52 Correct 450 ms 492 KB Output is correct
53 Correct 483 ms 492 KB Output is correct
54 Correct 446 ms 492 KB Output is correct
55 Correct 501 ms 492 KB Output is correct
56 Correct 431 ms 492 KB Output is correct

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 0 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 24 ms 364 KB Output is correct
10 Correct 11 ms 492 KB Output is correct
11 Correct 20 ms 364 KB Output is correct
12 Correct 17 ms 364 KB Output is correct
13 Correct 25 ms 492 KB Output is correct
14 Correct 14 ms 364 KB Output is correct
15 Correct 3 ms 364 KB Output is correct
16 Correct 14 ms 364 KB Output is correct
17 Correct 38 ms 384 KB Output is correct
18 Correct 23 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 11 ms 364 KB Output is correct
35 Correct 28 ms 364 KB Output is correct
36 Correct 40 ms 364 KB Output is correct
37 Correct 114 ms 364 KB Output is correct
38 Correct 122 ms 384 KB Output is correct
39 Correct 27 ms 364 KB Output is correct
40 Correct 1 ms 364 KB Output is correct
41 Correct 23 ms 364 KB Output is correct
42 Correct 41 ms 364 KB Output is correct
43 Correct 5 ms 364 KB Output is correct
44 Correct 23 ms 364 KB Output is correct
45 Correct 32 ms 364 KB Output is correct
46 Correct 40 ms 364 KB Output is correct
47 Correct 12 ms 364 KB Output is correct
48 Correct 2 ms 364 KB Output is correct
49 Correct 105 ms 392 KB Output is correct
50 Correct 43 ms 364 KB Output is correct
51 Correct 64 ms 492 KB Output is correct
52 Correct 43 ms 364 KB Output is correct
53 Correct 37 ms 364 KB Output is correct
54 Correct 111 ms 364 KB Output is correct
55 Correct 33 ms 364 KB Output is correct
56 Correct 53 ms 492 KB Output is correct
57 Correct 40 ms 364 KB Output is correct
58 Correct 454 ms 492 KB Output is correct
59 Correct 483 ms 396 KB Output is correct
60 Correct 450 ms 492 KB Output is correct
61 Correct 483 ms 492 KB Output is correct
62 Correct 446 ms 492 KB Output is correct
63 Correct 501 ms 492 KB Output is correct
64 Correct 431 ms 492 KB Output is correct
65 Correct 0 ms 364 KB Output is correct
66 Correct 1 ms 364 KB Output is correct
67 Execution timed out 2060 ms 364 KB Time limit exceeded
68 Halted 0 ms 0 KB -