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Submission #753842

# Submission time Handle Problem Language Result Execution time Memory
753842 2023-06-06T07:27:39 Z boyliguanhan Tug of War (BOI15_tug) C++17
100 / 100
 2599 ms 17184 KB 
#include<bits/stdc++.h>
#define doi(i) if(!adj[i].size()) {cout << "NO\n";return 0;}if(adj[i].size()<2) {q.push(i);sum+=(i>n/2?1:-1)*((*begin(adj[i])).second);}
#define shift(x) ((x)>0?bt<<(x):bt>>(-x))
using namespace std;
multiset<pair<int, int>> adj[200100];
queue<int> q;
bool del[200100];
bitset<1200000> bt;
int tot;
void dfs(int n, int N) {
	if (del[n]) return;
	del[n] = true;
	int nxt, cost;
	tie(nxt, cost) = *adj[n].begin();
    if(nxt>N)
	    tot += cost;
    else
        tot-=cost;
	if (!del[nxt]) {
		adj[nxt].erase(adj[nxt].find({n, cost}));
		adj[n].clear();
		dfs(nxt, N);
	}
}
int main() {
    cin.sync_with_stdio(false);
    cin.tie(nullptr);
    int n, k, sum = 0;
    cin >> n >> k;
    n*=2;
    for(int i = 1; i <= n; i++) {
        int x, y, w;
        cin >> x >> y >> w;
        y+=n/2;
        adj[x].insert({y,w});
        adj[y].insert({x,w});
    }
    for(int i = 1; i <= n; i++) {
        doi(i);
    }
    while(q.size()) {
        int x = q.front(), i = (*adj[x].begin()).first, w= (*adj[x].begin()).second;
        del[x] = 1;
        q.pop();
        adj[i].erase(adj[i].find({x,w}));
        doi(i);
    }
    bt[sum+600000]=1;
    for(int i = 1; i <= n; i++) {
        if(!del[i]) {
            tot = 0;
            adj[i].erase(adj[i].begin());
            dfs(i, n/2);
            bt = shift(tot)|shift(-tot);
        }
    }
    for(int i = -k; i <= k; i++) {
        if(bt[600000+i]) {
            cout << "YES\n";
            return 0;
        }
    }
    cout << "NO\n";
}

Compilation message

tug.cpp: In function 'void dfs(int, int)':
tug.cpp:17:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   17 |     else
      |     ^~~~
tug.cpp:19:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   19 |  if (!del[nxt]) {
      |  ^~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 10420 KB Output is correct
2 Correct 9 ms 10452 KB Output is correct
3 Correct 7 ms 10424 KB Output is correct
4 Correct 9 ms 10420 KB Output is correct
5 Correct 7 ms 10412 KB Output is correct
6 Correct 7 ms 10416 KB Output is correct
7 Correct 10 ms 10412 KB Output is correct
8 Correct 8 ms 10428 KB Output is correct
9 Correct 8 ms 10416 KB Output is correct
10 Correct 8 ms 10376 KB Output is correct
11 Correct 9 ms 10340 KB Output is correct
12 Correct 7 ms 10416 KB Output is correct
13 Correct 8 ms 10388 KB Output is correct
14 Correct 7 ms 10436 KB Output is correct
15 Correct 7 ms 10420 KB Output is correct
16 Correct 9 ms 10456 KB Output is correct
17 Correct 7 ms 10420 KB Output is correct
18 Correct 7 ms 10428 KB Output is correct
19 Correct 8 ms 10352 KB Output is correct
20 Correct 9 ms 10452 KB Output is correct
21 Correct 7 ms 10160 KB Output is correct
22 Correct 7 ms 10420 KB Output is correct
23 Correct 6 ms 10452 KB Output is correct
24 Correct 7 ms 10424 KB Output is correct
25 Correct 9 ms 10452 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 10420 KB Output is correct
2 Correct 9 ms 10452 KB Output is correct
3 Correct 7 ms 10424 KB Output is correct
4 Correct 9 ms 10420 KB Output is correct
5 Correct 7 ms 10412 KB Output is correct
6 Correct 7 ms 10416 KB Output is correct
7 Correct 10 ms 10412 KB Output is correct
8 Correct 8 ms 10428 KB Output is correct
9 Correct 8 ms 10416 KB Output is correct
10 Correct 8 ms 10376 KB Output is correct
11 Correct 9 ms 10340 KB Output is correct
12 Correct 7 ms 10416 KB Output is correct
13 Correct 8 ms 10388 KB Output is correct
14 Correct 7 ms 10436 KB Output is correct
15 Correct 7 ms 10420 KB Output is correct
16 Correct 9 ms 10456 KB Output is correct
17 Correct 7 ms 10420 KB Output is correct
18 Correct 7 ms 10428 KB Output is correct
19 Correct 8 ms 10352 KB Output is correct
20 Correct 9 ms 10452 KB Output is correct
21 Correct 7 ms 10160 KB Output is correct
22 Correct 7 ms 10420 KB Output is correct
23 Correct 6 ms 10452 KB Output is correct
24 Correct 7 ms 10424 KB Output is correct
25 Correct 9 ms 10452 KB Output is correct
26 Correct 172 ms 10868 KB Output is correct
27 Correct 27 ms 10812 KB Output is correct
28 Correct 175 ms 10868 KB Output is correct
29 Correct 36 ms 10864 KB Output is correct
30 Correct 145 ms 10816 KB Output is correct
31 Correct 35 ms 10864 KB Output is correct
32 Correct 165 ms 10868 KB Output is correct
33 Correct 29 ms 10836 KB Output is correct
34 Correct 21 ms 10880 KB Output is correct
35 Correct 32 ms 10812 KB Output is correct
36 Correct 165 ms 10864 KB Output is correct
37 Correct 33 ms 10860 KB Output is correct
38 Correct 170 ms 10864 KB Output is correct
39 Correct 37 ms 10872 KB Output is correct
40 Correct 189 ms 10864 KB Output is correct
41 Correct 27 ms 10808 KB Output is correct
42 Correct 157 ms 10868 KB Output is correct
43 Correct 28 ms 10792 KB Output is correct
44 Correct 166 ms 10868 KB Output is correct
45 Correct 30 ms 10836 KB Output is correct
46 Correct 178 ms 10860 KB Output is correct
47 Correct 9 ms 10580 KB Output is correct
48 Correct 82 ms 10836 KB Output is correct
49 Correct 86 ms 10868 KB Output is correct
50 Correct 166 ms 10836 KB Output is correct
51 Correct 166 ms 10868 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 593 ms 12568 KB Output is correct
2 Correct 20 ms 12204 KB Output is correct
3 Correct 494 ms 12560 KB Output is correct
4 Correct 15 ms 12272 KB Output is correct
5 Correct 575 ms 12564 KB Output is correct
6 Correct 15 ms 12244 KB Output is correct
7 Correct 474 ms 12560 KB Output is correct
8 Correct 16 ms 12224 KB Output is correct
9 Correct 515 ms 12568 KB Output is correct
10 Correct 16 ms 12244 KB Output is correct
11 Correct 482 ms 12564 KB Output is correct
12 Correct 15 ms 12244 KB Output is correct
13 Correct 470 ms 12572 KB Output is correct
14 Correct 462 ms 12620 KB Output is correct
15 Correct 15 ms 12184 KB Output is correct
16 Correct 463 ms 12500 KB Output is correct
17 Correct 23 ms 12152 KB Output is correct
18 Correct 557 ms 12572 KB Output is correct
19 Correct 22 ms 12244 KB Output is correct
20 Correct 457 ms 12564 KB Output is correct
21 Correct 17 ms 12244 KB Output is correct
22 Correct 205 ms 12472 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 10420 KB Output is correct
2 Correct 9 ms 10452 KB Output is correct
3 Correct 7 ms 10424 KB Output is correct
4 Correct 9 ms 10420 KB Output is correct
5 Correct 7 ms 10412 KB Output is correct
6 Correct 7 ms 10416 KB Output is correct
7 Correct 10 ms 10412 KB Output is correct
8 Correct 8 ms 10428 KB Output is correct
9 Correct 8 ms 10416 KB Output is correct
10 Correct 8 ms 10376 KB Output is correct
11 Correct 9 ms 10340 KB Output is correct
12 Correct 7 ms 10416 KB Output is correct
13 Correct 8 ms 10388 KB Output is correct
14 Correct 7 ms 10436 KB Output is correct
15 Correct 7 ms 10420 KB Output is correct
16 Correct 9 ms 10456 KB Output is correct
17 Correct 7 ms 10420 KB Output is correct
18 Correct 7 ms 10428 KB Output is correct
19 Correct 8 ms 10352 KB Output is correct
20 Correct 9 ms 10452 KB Output is correct
21 Correct 7 ms 10160 KB Output is correct
22 Correct 7 ms 10420 KB Output is correct
23 Correct 6 ms 10452 KB Output is correct
24 Correct 7 ms 10424 KB Output is correct
25 Correct 9 ms 10452 KB Output is correct
26 Correct 172 ms 10868 KB Output is correct
27 Correct 27 ms 10812 KB Output is correct
28 Correct 175 ms 10868 KB Output is correct
29 Correct 36 ms 10864 KB Output is correct
30 Correct 145 ms 10816 KB Output is correct
31 Correct 35 ms 10864 KB Output is correct
32 Correct 165 ms 10868 KB Output is correct
33 Correct 29 ms 10836 KB Output is correct
34 Correct 21 ms 10880 KB Output is correct
35 Correct 32 ms 10812 KB Output is correct
36 Correct 165 ms 10864 KB Output is correct
37 Correct 33 ms 10860 KB Output is correct
38 Correct 170 ms 10864 KB Output is correct
39 Correct 37 ms 10872 KB Output is correct
40 Correct 189 ms 10864 KB Output is correct
41 Correct 27 ms 10808 KB Output is correct
42 Correct 157 ms 10868 KB Output is correct
43 Correct 28 ms 10792 KB Output is correct
44 Correct 166 ms 10868 KB Output is correct
45 Correct 30 ms 10836 KB Output is correct
46 Correct 178 ms 10860 KB Output is correct
47 Correct 9 ms 10580 KB Output is correct
48 Correct 82 ms 10836 KB Output is correct
49 Correct 86 ms 10868 KB Output is correct
50 Correct 166 ms 10836 KB Output is correct
51 Correct 166 ms 10868 KB Output is correct
52 Correct 593 ms 12568 KB Output is correct
53 Correct 20 ms 12204 KB Output is correct
54 Correct 494 ms 12560 KB Output is correct
55 Correct 15 ms 12272 KB Output is correct
56 Correct 575 ms 12564 KB Output is correct
57 Correct 15 ms 12244 KB Output is correct
58 Correct 474 ms 12560 KB Output is correct
59 Correct 16 ms 12224 KB Output is correct
60 Correct 515 ms 12568 KB Output is correct
61 Correct 16 ms 12244 KB Output is correct
62 Correct 482 ms 12564 KB Output is correct
63 Correct 15 ms 12244 KB Output is correct
64 Correct 470 ms 12572 KB Output is correct
65 Correct 462 ms 12620 KB Output is correct
66 Correct 15 ms 12184 KB Output is correct
67 Correct 463 ms 12500 KB Output is correct
68 Correct 23 ms 12152 KB Output is correct
69 Correct 557 ms 12572 KB Output is correct
70 Correct 22 ms 12244 KB Output is correct
71 Correct 457 ms 12564 KB Output is correct
72 Correct 17 ms 12244 KB Output is correct
73 Correct 205 ms 12472 KB Output is correct
74 Correct 2396 ms 17056 KB Output is correct
75 Correct 152 ms 16824 KB Output is correct
76 Correct 2599 ms 16936 KB Output is correct
77 Correct 186 ms 16940 KB Output is correct
78 Correct 2428 ms 16884 KB Output is correct
79 Correct 2222 ms 16644 KB Output is correct
80 Correct 117 ms 16500 KB Output is correct
81 Correct 125 ms 16492 KB Output is correct
82 Correct 2185 ms 16724 KB Output is correct
83 Correct 2016 ms 16500 KB Output is correct
84 Correct 127 ms 16084 KB Output is correct
85 Correct 2211 ms 16248 KB Output is correct
86 Correct 117 ms 16084 KB Output is correct
87 Correct 1953 ms 16236 KB Output is correct
88 Correct 113 ms 16136 KB Output is correct
89 Correct 2083 ms 16136 KB Output is correct
90 Correct 135 ms 16124 KB Output is correct
91 Correct 2252 ms 16376 KB Output is correct
92 Correct 133 ms 16820 KB Output is correct
93 Correct 2412 ms 17064 KB Output is correct
94 Correct 46 ms 16560 KB Output is correct
95 Correct 1730 ms 17100 KB Output is correct
96 Correct 1045 ms 17028 KB Output is correct
97 Correct 1936 ms 17040 KB Output is correct
98 Correct 1926 ms 17184 KB Output is correct