oj.uz

답안 #378667

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
378667 2021-03-17T03:04:11 Z fhvirus Gift (IZhO18_nicegift) C++17
0 / 100
 1 ms 364 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 dx = x1 % f;
			int dy = y1 % f;
			ll v;

			if(dx + lx - 1 < f and dy + ly - 1 < f){
				v = lx * ly;
			} else if(dx + lx - 1 < f){
				ll a = f - dy;
				ll b = ly - a;
				v = 1ll * lx * (a - b);
			} else if(dy + ly - 1 < f){
				ll a = f - dx;
				ll b = lx - a;
				v = 1ll * ly * (a - b);
			} else {
				ll a = f - dx;
				ll b = lx - a;
				ll c = f - dy;
				ll d = ly - c;
				v = (a - b) * (c - d);
			}

			int x = x1 / f;
			int y = y1 / f;
			if((x + y) & 1) cb[i] -= v, ca[i] += v;
			else ca[i] -= v, cb[i] += v;
		}
	}

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

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

Compilation message

nicegift.cpp: In function 'int32_t main()':
nicegift.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)
      |                                   ^
nicegift.cpp:48:2: note: in expansion of macro 'FOR'
   48 |  FOR(i,facs.size()){
      |  ^~~
nicegift.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)
      |                                   ^
nicegift.cpp:60:3: note: in expansion of macro 'FOR'
   60 |   FOR(i, facs.size()){
      |   ^~~
nicegift.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
nicegift.cpp:97:2: note: in expansion of macro 'DE'
   97 |  DE(AI(facs));
      |  ^~
nicegift.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
nicegift.cpp:98:2: note: in expansion of macro 'DE'
   98 |  DE(AI(ca));
      |  ^~
nicegift.cpp:21:17: warning: statement has no effect [-Wunused-value]
   21 | #define DE(...) 0
      |                 ^
nicegift.cpp:99:2: note: in expansion of macro 'DE'
   99 |  DE(AI(cb));
      |  ^~

Subtask #1
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 364 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 364 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 364 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 364 KB Expected int32, but "470745450496" found
2 Halted 0 ms 0 KB -

Subtask #5
0 / 51.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 364 KB Unexpected end of file - int64 expected
2 Halted 0 ms 0 KB -