oj.uz

Submission #890952

# Submission time Handle Problem Language Result Execution time Memory
890952 2023-12-22T05:34:00 Z nahco314 Tug of War (BOI15_tug) C++14
100 / 100
 772 ms 11348 KB 
#include <bits/stdc++.h>
using namespace std;

void ng() {
    cerr << "NG" << endl;
    cout << "NO" << endl;
    exit(0);
}

int remove(int v, vector<set<tuple<int, int, int>>>& g) {
    if (g[v].size() == 1) {
        tuple<int, int, int> elt = *g[v].begin();
        int l = v;
        int r = get<0>(elt);
        int s = get<1>(elt);
        int i = get<2>(elt);
        g[l].erase({r, s, i});
        g[r].erase({l, s, i});
        return s + -remove(r, g);
    }
    return 0;
}

int dfs_(int v, int start, int sign, vector<set<tuple<int, int, int>>>& g, vector<bool>& seen) {
    seen[v] = true;
    int res = 0;
    sign *= -1;
    bool did = false;
    for (auto [nxt, s, e] : g[v]) {
        if (seen[nxt]) continue;
        else did = true;
        cerr << "dfs " << v << " " << nxt << endl;
        res += sign * s;
        res += dfs_(nxt, start, sign, g, seen);
    }
    if (!did) {
        bool ok = false;
        for (auto [nxt, s, e] : g[v]) {
            if (nxt == start) {
                ok = true;
                res += sign * s;
            }
        }
        if (!ok) ng();
    }
    // cerr << v << " " << used_e << " " << sign << " " << res << endl;
    return res;
}

int dfs(int v, int used_e, int end, int sign, vector<set<tuple<int, int, int>>>& g, vector<bool>& seen) {
    seen[v] = true;
    int res = 0;
    sign *= -1;
    bool did = false;
    for (auto [nxt, s, e] : g[v]) {
        if (e == used_e) continue;
        if (seen[nxt]) continue;
        did = true;
        res += sign * s;
        res += dfs(nxt, e, end, sign, g, seen);
    }
    if ((!did) && v != end) {
        ng();
    }
    // cerr << v << " " << used_e << " " << sign << " " << res << endl;
    return res;
}

int main() {
    int n, k;
    cin >> n >> k;
    vector<set<tuple<int, int, int>>> g(2 * n);
    for (int i = 0; i < 2 * n; i++) {
        int l, r, s;
        cin >> l >> r >> s;
        l--;
        r--;
        r += n;
        g[l].emplace(r, s, i);
        g[r].emplace(l, s, i);
    }

    int cur_sum = 0;
    for (int i = 0; i < 2 * n; i++) {
        int sign = i < n ? 1 : -1;
        cur_sum += remove(i, g) * sign;
    }

    cerr << "cur_sum: " << cur_sum << endl;

    vector<int> nums;
    vector<bool> seen(2 * n, false);
    for (int i = 0; i < 2 * n; i++) {
        if (seen[i]) continue;
        if (g[i].size() == 0) continue;
        int l = i;
        int r = get<0>(*g[i].begin());
        int s = get<1>(*g[i].begin());
        int used_e = get<2>(*g[i].begin());

        int num = s + dfs(l, used_e, r, 1, g, seen);
        nums.push_back(num);
    }

    for (auto a : nums) {
        cerr << a << " ";
    }
    cerr << endl;

    int m = nums.size();
    int mid = n * 20 / 2;
    bitset<600001> cur(0);
    cur.set(cur_sum + mid);

    for (int i = 0; i < m; i++) {
        int num = abs(nums[i]);
        cur <<= num;
        cur |= cur >> (2 * num);

        /*
        cerr << i << endl;
        for (int i = 0; i < 600001; i++) {
            if (cur.test(i)) {
                cerr << i - mid << " ";
            }
        }
        cerr << endl;
        */
    }

    bool ok = false;
    int minimum = INT32_MAX;

    for (int i = -k; i <= k; i++) {
        int num = mid + i;
        if (cur.test(num)) {
            ok = true;
            minimum = min(i, minimum);
        }
    }

    if (ok) {
        cout << "YES" << endl;
        cerr << minimum << endl;
    } else {
        cout << "NO" << endl;
    }
}

Compilation message

tug.cpp: In function 'int dfs_(int, int, int, std::vector<std::set<std::tuple<int, int, int> > >&, std::vector<bool>&)':
tug.cpp:29:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   29 |     for (auto [nxt, s, e] : g[v]) {
      |               ^
tug.cpp:38:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |         for (auto [nxt, s, e] : g[v]) {
      |                   ^
tug.cpp: In function 'int dfs(int, int, int, int, std::vector<std::set<std::tuple<int, int, int> > >&, std::vector<bool>&)':
tug.cpp:55:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   55 |     for (auto [nxt, s, e] : g[v]) {
      |               ^

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 856 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 760 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 0 ms 604 KB Output is correct
22 Correct 0 ms 604 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 600 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 856 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 760 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 0 ms 604 KB Output is correct
22 Correct 0 ms 604 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 47 ms 1372 KB Output is correct
27 Correct 10 ms 1116 KB Output is correct
28 Correct 50 ms 1348 KB Output is correct
29 Correct 9 ms 1112 KB Output is correct
30 Correct 47 ms 1368 KB Output is correct
31 Correct 9 ms 1116 KB Output is correct
32 Correct 47 ms 1348 KB Output is correct
33 Correct 9 ms 1116 KB Output is correct
34 Correct 6 ms 1116 KB Output is correct
35 Correct 9 ms 1356 KB Output is correct
36 Correct 47 ms 1116 KB Output is correct
37 Correct 9 ms 1112 KB Output is correct
38 Correct 47 ms 1276 KB Output is correct
39 Correct 9 ms 1116 KB Output is correct
40 Correct 49 ms 1372 KB Output is correct
41 Correct 9 ms 1112 KB Output is correct
42 Correct 48 ms 1372 KB Output is correct
43 Correct 9 ms 1112 KB Output is correct
44 Correct 47 ms 1368 KB Output is correct
45 Correct 9 ms 1368 KB Output is correct
46 Correct 47 ms 1116 KB Output is correct
47 Correct 3 ms 1112 KB Output is correct
48 Correct 26 ms 1356 KB Output is correct
49 Correct 25 ms 1116 KB Output is correct
50 Correct 48 ms 1344 KB Output is correct
51 Correct 48 ms 1368 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 4228 KB Output is correct
2 Correct 14 ms 4024 KB Output is correct
3 Correct 119 ms 4436 KB Output is correct
4 Correct 14 ms 3932 KB Output is correct
5 Correct 113 ms 4208 KB Output is correct
6 Correct 13 ms 3932 KB Output is correct
7 Correct 114 ms 4224 KB Output is correct
8 Correct 13 ms 3928 KB Output is correct
9 Correct 119 ms 4416 KB Output is correct
10 Correct 13 ms 3932 KB Output is correct
11 Correct 115 ms 4212 KB Output is correct
12 Correct 14 ms 3932 KB Output is correct
13 Correct 121 ms 4212 KB Output is correct
14 Correct 116 ms 4188 KB Output is correct
15 Correct 13 ms 3928 KB Output is correct
16 Correct 114 ms 4212 KB Output is correct
17 Correct 13 ms 3932 KB Output is correct
18 Correct 114 ms 4228 KB Output is correct
19 Correct 14 ms 3932 KB Output is correct
20 Correct 113 ms 4208 KB Output is correct
21 Correct 14 ms 3932 KB Output is correct
22 Correct 65 ms 4164 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 856 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 760 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 0 ms 604 KB Output is correct
22 Correct 0 ms 604 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 47 ms 1372 KB Output is correct
27 Correct 10 ms 1116 KB Output is correct
28 Correct 50 ms 1348 KB Output is correct
29 Correct 9 ms 1112 KB Output is correct
30 Correct 47 ms 1368 KB Output is correct
31 Correct 9 ms 1116 KB Output is correct
32 Correct 47 ms 1348 KB Output is correct
33 Correct 9 ms 1116 KB Output is correct
34 Correct 6 ms 1116 KB Output is correct
35 Correct 9 ms 1356 KB Output is correct
36 Correct 47 ms 1116 KB Output is correct
37 Correct 9 ms 1112 KB Output is correct
38 Correct 47 ms 1276 KB Output is correct
39 Correct 9 ms 1116 KB Output is correct
40 Correct 49 ms 1372 KB Output is correct
41 Correct 9 ms 1112 KB Output is correct
42 Correct 48 ms 1372 KB Output is correct
43 Correct 9 ms 1112 KB Output is correct
44 Correct 47 ms 1368 KB Output is correct
45 Correct 9 ms 1368 KB Output is correct
46 Correct 47 ms 1116 KB Output is correct
47 Correct 3 ms 1112 KB Output is correct
48 Correct 26 ms 1356 KB Output is correct
49 Correct 25 ms 1116 KB Output is correct
50 Correct 48 ms 1344 KB Output is correct
51 Correct 48 ms 1368 KB Output is correct
52 Correct 114 ms 4228 KB Output is correct
53 Correct 14 ms 4024 KB Output is correct
54 Correct 119 ms 4436 KB Output is correct
55 Correct 14 ms 3932 KB Output is correct
56 Correct 113 ms 4208 KB Output is correct
57 Correct 13 ms 3932 KB Output is correct
58 Correct 114 ms 4224 KB Output is correct
59 Correct 13 ms 3928 KB Output is correct
60 Correct 119 ms 4416 KB Output is correct
61 Correct 13 ms 3932 KB Output is correct
62 Correct 115 ms 4212 KB Output is correct
63 Correct 14 ms 3932 KB Output is correct
64 Correct 121 ms 4212 KB Output is correct
65 Correct 116 ms 4188 KB Output is correct
66 Correct 13 ms 3928 KB Output is correct
67 Correct 114 ms 4212 KB Output is correct
68 Correct 13 ms 3932 KB Output is correct
69 Correct 114 ms 4228 KB Output is correct
70 Correct 14 ms 3932 KB Output is correct
71 Correct 113 ms 4208 KB Output is correct
72 Correct 14 ms 3932 KB Output is correct
73 Correct 65 ms 4164 KB Output is correct
74 Correct 712 ms 11240 KB Output is correct
75 Correct 96 ms 10852 KB Output is correct
76 Correct 706 ms 11092 KB Output is correct
77 Correct 82 ms 11116 KB Output is correct
78 Correct 705 ms 11328 KB Output is correct
79 Correct 708 ms 11088 KB Output is correct
80 Correct 74 ms 10836 KB Output is correct
81 Correct 76 ms 10844 KB Output is correct
82 Correct 716 ms 11236 KB Output is correct
83 Correct 709 ms 11324 KB Output is correct
84 Correct 89 ms 10956 KB Output is correct
85 Correct 711 ms 11088 KB Output is correct
86 Correct 69 ms 10832 KB Output is correct
87 Correct 708 ms 11216 KB Output is correct
88 Correct 70 ms 10824 KB Output is correct
89 Correct 726 ms 11100 KB Output is correct
90 Correct 83 ms 10832 KB Output is correct
91 Correct 718 ms 11092 KB Output is correct
92 Correct 86 ms 11004 KB Output is correct
93 Correct 772 ms 11324 KB Output is correct
94 Correct 63 ms 10760 KB Output is correct
95 Correct 405 ms 11048 KB Output is correct
96 Correct 409 ms 11152 KB Output is correct
97 Correct 769 ms 11348 KB Output is correct
98 Correct 750 ms 11348 KB Output is correct