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Submission #471966

# Submission time Handle Problem Language Result Execution time Memory
471966 2021-09-12T01:48:57 Z SHZhang Toy Train (IOI17_train) C++14
11 / 100
 2000 ms 79924 KB 
#include <vector>
#include <queue>
#include "train.h"

using namespace std;

int n, m;
vector<int> rgraph[5005];
int f[5005];
int freq[5005][5005];

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
	n = (int)a.size();
    m = (int)u.size();
    for (int i = 0; i < m; i++) {
        rgraph[v[i]].push_back(u[i]);
        freq[u[i]][0]++;
    }
    queue<pair<int, int> > que;
    for (int i = 0; i < n; i++) {
        if (r[i]) {
            f[i] = 1;
            que.push(make_pair(i, 0));
        }
    }
    while (!que.empty()) {
        pair<int, int> pr = que.front();
        //fprintf(stderr, "! %d %d\n", pr.first, pr.second);
        int cur = pr.first; que.pop();
        for (int idx = 0; idx < rgraph[cur].size(); idx++) {
            int pre = rgraph[cur][idx];
            if (f[pre] > n) continue;
            if (a[pre]) {
                int newf = f[cur] + r[pre];
                if (newf > f[pre]) {
                    que.push(make_pair(pre, f[pre]));
                    f[pre] = newf;
                }
            } else {
                freq[pre][pr.second]--;
                freq[pre][f[cur]]++;
                //fprintf(stderr, "freq %d -%d +%d => %d %d\n", pre, pr.second, f[cur], freq[pre][pr.second], freq[pre][f[cur]]);
                int old_f = f[pre];
                while (freq[pre][f[pre] - r[pre]] == 0) f[pre]++;
                if (f[pre] > old_f) {
                    que.push(make_pair(pre, old_f));
                }
            }
        }
    }
    vector<int> ans;
    for (int i = 0; i < n; i++) {
        //fprintf(stderr, "%d ", f[i]);
        ans.push_back(f[i] > n ? 1 : 0);
    }
    return ans;
}

Compilation message

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:30:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         for (int idx = 0; idx < rgraph[cur].size(); idx++) {
      |                           ~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 392 ms 36036 KB 3rd lines differ - on the 96th token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Incorrect 1 ms 460 KB 3rd lines differ - on the 2nd token, expected: '1', found: '0'
3 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 21452 KB Output is correct
2 Correct 162 ms 21436 KB Output is correct
3 Correct 193 ms 21452 KB Output is correct
4 Correct 526 ms 49440 KB Output is correct
5 Correct 625 ms 45656 KB Output is correct
6 Correct 41 ms 21444 KB Output is correct
7 Correct 61 ms 24872 KB Output is correct
8 Correct 502 ms 21412 KB Output is correct
9 Correct 18 ms 21324 KB Output is correct
10 Correct 712 ms 21436 KB Output is correct
11 Correct 605 ms 21360 KB Output is correct
12 Correct 19 ms 21316 KB Output is correct
13 Correct 1364 ms 21432 KB Output is correct
14 Correct 1407 ms 21424 KB Output is correct
15 Correct 1358 ms 21416 KB Output is correct
16 Correct 1354 ms 21444 KB Output is correct
17 Correct 1373 ms 21424 KB Output is correct
18 Correct 125 ms 21136 KB Output is correct

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 21392 KB 3rd lines differ - on the 1st token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1719 ms 79924 KB Output is correct
2 Correct 1767 ms 38044 KB Output is correct
3 Execution timed out 2092 ms 67328 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 51.0

# Verdict Execution time Memory Grader output
1 Incorrect 392 ms 36036 KB 3rd lines differ - on the 96th token, expected: '1', found: '0'
2 Halted 0 ms 0 KB -