oj.uz

Submission #708180

# Submission time Handle Problem Language Result Execution time Memory
708180 2023-03-11T09:01:16 Z device None (JOI16_memory2) C++17
60 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y){
    return uniform_int_distribution<int>(x, y)(rng);
}
int Flip(int I, int J);
void Answer(int I, int J, int X);
void out(int i, int j, int k) {
    if (i > j) swap(i, j);
    Answer(i, j, k);
}
void Solve(int t, int n){
    vector<int> v;
    for (int i = 0; i < (n << 1); i++) v.push_back(i);
    while (!v.empty()) {
        vector<vector<int>> p(n);
        int ptr = v[rnd(0, v.size()-1)], it;
        for (int i = 0; i < v.size(); i++) if (v[i] != ptr) p[Flip(ptr, v[i])].push_back(v[i]);
        for (int i = 0; i < n; i++) {
            if (p[i].size() == 2) {
                v.erase(find(v.begin(), v.end(), p[i][0]));
                v.erase(find(v.begin(), v.end(), p[i][1]));
                out(p[i][0], p[i][1], i);
            } else if (p[i].size() & 1) it = i;
        }
        if (v.size() == 2) {
            out(v[0], v[1], it);
            return;
        }
    }
}

Compilation message

memory2.cpp: In function 'void Solve(int, int)':
memory2.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (int i = 0; i < v.size(); i++) if (v[i] != ptr) p[Flip(ptr, v[i])].push_back(v[i]);
      |                         ~~^~~~~~~~~~
memory2.cpp:11:11: warning: 'it' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 |     Answer(i, j, k);
      |     ~~~~~~^~~~~~~~~
memory2.cpp:18:42: note: 'it' was declared here
   18 |         int ptr = v[rnd(0, v.size()-1)], it;
      |                                          ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 312 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct

Subtask #2
50.0 / 50.0

# 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 1 ms 304 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 304 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB Wrong Answer[2]
4 Halted 0 ms 0 KB -