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Submission #641670

# Submission time Handle Problem Language Result Execution time Memory
641670 2022-09-17T12:07:51 Z piOOE Toy Train (IOI17_train) C++17
5 / 100
 1721 ms 1632 KB 
#include <bits/stdc++.h>
#include "train.h"

using namespace std;
using ll = long long;

constexpr int N = 5000;

vector<int> g[N];
bool dp[N];
int used[N], T = 0;
vector<int> stk, last;
int in_stk[N];

vector<int> r, a;

void dfs(int v) {
    used[v] = T;
    in_stk[v] = stk.size();
    stk.push_back(v);
    if (r[v]) {
        last.push_back(last.size() - 1);
    } else {
        last.push_back(last.back());
    }
    for (int to: g[v]) {
        if (in_stk[to] != -1) {
            if (a[v] ^ (last.back() < in_stk[to])) {
                dp[v] = true;
            }
        } else {
            if (used[to] != T) {
                dfs(to);
            }
            if (a[v] ^ a[to] ^ dp[to]) {
                dp[v] = true;
            }
        }
    }
    stk.pop_back();
    last.pop_back();
    in_stk[v] = -1;
};

std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> A, std::vector<int> B) {
    ::a = a, ::r = r;
    int n = a.size(), m = A.size();
    for (int i = 0; i < m; ++i) {
        g[A[i]].push_back(B[i]);
    }
    memset(in_stk, -1, sizeof(in_stk));
    last = {-1};
    vector<int> ans(n);
    for (int root = 0; root < n; ++root) {
        ++T;
        memset(dp, 0, sizeof(dp));
        dfs(root);
        ans[root] = dp[root] ^ a[root] ^ 1;
    }
    return ans;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 355 ms 1384 KB Output is correct
2 Correct 119 ms 1132 KB Output is correct
3 Correct 53 ms 984 KB Output is correct
4 Correct 18 ms 928 KB Output is correct
5 Correct 10 ms 852 KB Output is correct
6 Correct 5 ms 768 KB Output is correct
7 Correct 5 ms 852 KB Output is correct
8 Correct 5 ms 852 KB Output is correct
9 Correct 6 ms 872 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 3 ms 724 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Incorrect 0 ms 340 KB 3rd lines differ - on the 4th token, expected: '0', found: '1'
5 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 251 ms 1632 KB Output is correct
2 Correct 253 ms 1612 KB Output is correct
3 Correct 257 ms 1496 KB Output is correct
4 Correct 1710 ms 1484 KB Output is correct
5 Correct 1232 ms 1536 KB Output is correct
6 Correct 734 ms 1348 KB Output is correct
7 Correct 638 ms 1324 KB Output is correct
8 Incorrect 393 ms 1364 KB 3rd lines differ - on the 27th token, expected: '1', found: '0'
9 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1133 ms 1236 KB Output is correct
2 Correct 194 ms 1060 KB Output is correct
3 Correct 493 ms 1132 KB Output is correct
4 Correct 713 ms 1120 KB Output is correct
5 Correct 504 ms 1148 KB Output is correct
6 Incorrect 396 ms 1148 KB 3rd lines differ - on the 1524th token, expected: '0', found: '1'
7 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1721 ms 1372 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 355 ms 1384 KB Output is correct
2 Correct 119 ms 1132 KB Output is correct
3 Correct 53 ms 984 KB Output is correct
4 Correct 18 ms 928 KB Output is correct
5 Correct 10 ms 852 KB Output is correct
6 Correct 5 ms 768 KB Output is correct
7 Correct 5 ms 852 KB Output is correct
8 Correct 5 ms 852 KB Output is correct
9 Correct 6 ms 872 KB Output is correct
10 Correct 4 ms 852 KB Output is correct
11 Correct 3 ms 724 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Incorrect 0 ms 340 KB 3rd lines differ - on the 4th token, expected: '0', found: '1'
16 Halted 0 ms 0 KB -