Submission #258141

#	Time	Username	Problem	Language	Result	Execution time	Memory
258141		mieszko11b	Mixture (BOI20_mixture)	C++14	0 / 100	2 ms	416 KiB

Mixture

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using pll = pair<ll, ll>;
using uid = uniform_int_distribution<int>;
using point = pair<ld, ld>;

using ordered_set = tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>;
using ordered_multiset = tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>;

const int inf = int(1e9) + 7;
const ll INF = ll(1e18) + 7;
const ld EPS = 1e-8;

#define X first
#define Y second

//~ mt19937 rng(chrono::steady_clock().now().time_since_epoch().count());

//~ int rand(int a, int b) {
	//~ return uid(a, b)(rng);
//~ }

void boost() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
}

int s, p, g;
vector<pair<point, int> > P;
point M;

point norm(int s, int p, int g) {
	ld sum = s + p + g;
	return {ld(s) / sum, ld(p) / sum};
}

bool equ(ld a, ld b) {
	return abs(a - b) < EPS;
}

ld cross(point o, point a, point b) {
	ld x1 = a.X - o.X;
	ld y1 = a.Y - o.Y;
	ld x2 = b.X - o.X;
	ld y2 = b.Y - o.Y;
	return x1 * y2 - x2 * y1;
}

int sign(ld x) {
	if(x < 0) return -1;
	if(x > 0) return 1;
	return 0;
}

void solve() {
	scanf("%d%d%d", &s, &p, &g);
	M = norm(s, p, g);
	int n;
	scanf("%d", &n);
	int cnt = 0;
	while(n--) {
		char c;
		scanf(" %c", &c);
		if(c == 'A') {
			int a, b, c;
			scanf("%d%d%d", &a, &b, &c);
			cnt++;
			P.emplace_back(norm(a, b, c), cnt);
		} else {
			int r;
			scanf("%d", &r);
			for(int i = 0 ; i < P.size() ; i++) {
				if(P[i].Y == r) {
					P.erase(P.begin() + i);
					break;
				}
			}
		}
		
		int res = 0;
		
		for(int i = 0 ; i < P.size() ; i++) {
			for(int j = i + 1 ; j < P.size() ; j++) {
				for(int k = j + 1 ; k < P.size() ; k++) {
					point a = P[i].X;
					point b = P[j].X;
					point c = P[k].X;
					
					if(sign(cross(a, b, M)) == sign(cross(b, c, M)) && sign(cross(b, c, M)) == sign(cross(c, a, M)))
						res = 3;
				}
			}
		}
		
		for(int i = 0 ; i < P.size() ; i++) {
			for(int j = i + 1 ; j < P.size() ; j++) {
				point a = P[i].X;
				point b = P[j].X;
				if(!equ(cross(a, b, M), 0))
					continue;
				if(a.X < b.X && (M.X < a.X || M.X > b.X))
					continue;
				if(a.Y < b.Y && (M.Y < a.Y || M.Y > b.Y))
					continue;
				res = 2;
			}
		}
		
		for(auto p : P)
			if(equ(p.X.X, M.X) && equ(p.X.Y, M.Y))
				res = 1;
				
		printf("%d\n", res);
	}
}

int main() {
	//~ boost();
	int t = 1;
	//~ scanf("%d", &t);
	while(t--) {
		solve();
	}
	return 0;
}

Compilation message (stderr)

Mixture.cpp: In function 'void solve()':
Mixture.cpp:80:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i = 0 ; i < P.size() ; i++) {
                    ~~^~~~~~~~~~
Mixture.cpp:90:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0 ; i < P.size() ; i++) {
                   ~~^~~~~~~~~~
Mixture.cpp:91:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j = i + 1 ; j < P.size() ; j++) {
                        ~~^~~~~~~~~~
Mixture.cpp:92:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int k = j + 1 ; k < P.size() ; k++) {
                         ~~^~~~~~~~~~
Mixture.cpp:103:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0 ; i < P.size() ; i++) {
                   ~~^~~~~~~~~~
Mixture.cpp:104:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j = i + 1 ; j < P.size() ; j++) {
                        ~~^~~~~~~~~~
Mixture.cpp:64:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &s, &p, &g);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~
Mixture.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
Mixture.cpp:71:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %c", &c);
   ~~~~~^~~~~~~~~~~
Mixture.cpp:74:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d%d", &a, &b, &c);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~
Mixture.cpp:79:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &r);
    ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40