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Submission #791583

# Submission time Handle Problem Language Result Execution time Memory
791583 2023-07-24T07:41:52 Z peteza Roads (CEOI20_roads) C++14
15 / 100
 35 ms 1500 KB 
#include <bits/stdc++.h>
using namespace std;

int n, xx1, yy1, xx2, yy2;
using pii = pair<int, int>;
struct line {
    pii a, b;
    line(int ax, int ay, int bx, int by){a={ax,ay};b={bx,by};}
    double gety() {
        if(a.first == b.first) return -a.first;
        return a.second - a.first*(1.00*b.second-a.second)/(b.first-a.first);
    }
};

vector<line> lns;

ostream& operator<<(ostream& os, pii a) {
    os << a.first << ' ' << a.second;
    return os;
}

int main() {
    cin >> n;
    for(int i=0;i<n;i++) {
        cin >> xx1 >> yy1 >> xx2 >> yy2;
        if(xx1 == xx2) {
            if(yy1 > yy2) swap(yy1, yy2);
        } else {
            if(xx1 > xx2) swap(xx1, xx2);
        }
        lns.emplace_back(xx1, yy1, xx2, yy2);
    }
    sort(lns.begin(), lns.end(), [](line a, line b){
        //if(a.a.first == 3 && a.a.second == 4 && b.a.first == 1 && b.a.second == 2) cout << a.gety() << ' ' << b.gety() << '\n';
        if(abs(a.gety()-b.gety())>=1e-6) return a.gety() > b.gety();
        return a.a < b.a;
    });
    for(int i=1;i<lns.size();i++) cout << lns[i-1].b << ' ' << lns[i].a << '\n';
}

Compilation message

roads.cpp: In function 'int main()':
roads.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<line>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i=1;i<lns.size();i++) cout << lns[i-1].b << ' ' << lns[i].a << '\n';
      |                 ~^~~~~~~~~~~

Subtask #1
0 / 0.0

# Verdict Execution time Memory Grader output
1 Failed 0 ms 212 KB Condition failed: "pf == Sline.end() || !Cross(S[*pi], S[*pf])"
2 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 17 ms 840 KB Output is correct
5 Correct 27 ms 1328 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 17 ms 812 KB Output is correct
5 Correct 27 ms 1232 KB Output is correct
6 Failed 0 ms 212 KB Condition failed: "iA != P2I.end()"
7 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 14 ms 840 KB Output is correct
5 Correct 35 ms 1500 KB Output is correct
6 Failed 0 ms 212 KB Condition failed: "pf == Sline.end() || !Cross(S[*pa], S[*pf])"
7 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Failed 0 ms 212 KB Condition failed: "pf == Sline.end() || !Cross(S[*pi], S[*pf])"
2 Halted 0 ms 0 KB -

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Failed 1 ms 212 KB Condition failed: "pf == Sline.end() || !Cross(S[*pi], S[*pf])"
2 Halted 0 ms 0 KB -