Submission #65665

#	Time	Username	Problem	Language	Result	Execution time	Memory
65665		imeimi2000	두 박스 (KOI18_box)	C++17	100 / 100	4 ms	1060 KiB

box

#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_map>
#include <functional>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cstdlib>

using namespace std;
typedef long long llong;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<llong, llong> pll;

void pr(int i) {
    if (i == 0) printf("FACE\n");
    if (i == 1) printf("LINE\n");
    if (i == 2) printf("POINT\n");
    if (i == 3) printf("NULL\n");
    exit(0);
}

struct ev {
    int x;
    int y1, y2;
    int t;
    bool operator<(const ev &p) const {
        if (x != p.x) return x < p.x;
        return t < p.t;
    }
};

int col(int x1, int x2, int y1, int x3, int x4, int y2) {
    if (y1 != y2) return 0;
    if (x2 <= x3) return 0;
    if (x4 <= x1) return 0;
    return 1;
}

int main() {
    int x1, y1, x2, y2, x3, y3, x4, y4;
    scanf("%d%d%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4);
    
    vector<ev> v;
    v.push_back({ x1, y1, y2, 1 });
    v.push_back({ x2, y1, y2, 0 });
    v.push_back({ x3, y3, y4, 1 });
    v.push_back({ x4, y3, y4, 0 });
    sort(v.begin(), v.end());
    set<pii> mp;
    for (ev i : v) {
        if (i.t) {
            if (mp.size()) {
                pii x = *mp.begin();
                if (x.first < i.y2 && i.y1 < x.second) pr(0);
            }
            mp.emplace(i.y1, i.y2);
        }
        else {
            mp.erase(pii(i.y1, i.y2));
        }
    }
    
    if (col(x1, x2, y1, x3, x4, y4)) pr(1);
    if (col(x1, x2, y2, x3, x4, y3)) pr(1);
    if (col(y1, y2, x1, y3, y4, x4)) pr(1);
    if (col(y1, y2, x2, y3, y4, x3)) pr(1);
    
    set<int> xs;
    xs.insert(x1);
    xs.insert(x2);
    xs.insert(x3);
    xs.insert(x4);
    
    
    set<int> ys;
    ys.insert(y1);
    ys.insert(y2);
    ys.insert(y3);
    ys.insert(y4);
    
    if (xs.size() < 4 && ys.size() < 4) pr(2);
    pr(3);
    
	return 0;
}

Compilation message (stderr)

box.cpp: In function 'int main()':
box.cpp:48:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 33 / 33
• Subtask 2: 30 / 30
• Subtask 3: 37 / 37