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Submission #30935

# Submission time Handle Problem Language Result Execution time Memory
30935 2017-08-01T08:44:05 Z Navick Tug of War (BOI15_tug) C++14
71 / 100
 3000 ms 13656 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define pii pair<int, int>
#define pb push_back

using namespace std;

typedef long long ll;
typedef long double ld;

const int N = 3e4 + 10, K = 20;

int n, k, deg[2 * N], suml, sumr, sum, p[4 * N];
vector<int> adj[4 * N];
bool mark[4 * N];
set<pii> s;
pii vl[4 * N];
bitset<2 * N * K> dp, foo;

inline int pe(int i){
	return 2 * n + i;
}

inline int rg(int i){
	return i + n;
}

inline int lf(int i){
	return i;
}

void dfs(int v, int c, int h = 0){
	mark[v] = true;
	if(v>=2*n){
		if(h % 4 == 1)
			vl[c].F += p[v];
		else
			vl[c].S += p[v];
	}
	for(auto u : adj[v]){
		if(mark[u])continue;
		dfs(u, c, h + 1);
	}
}

int main(){
	scanf("%d %d", &n, &k);
	for(int i=0; i<2*n; i++){
		int l, r; scanf("%d %d", &l, &r);
		--l; --r;

		scanf("%d", &p[pe(i)]); sum += p[pe(i)];

		adj[pe(i)].pb(lf(l));
		adj[pe(i)].pb(rg(r));
		adj[rg(r)].pb(pe(i));
		adj[lf(l)].pb(pe(i));
	}

	for(int i=0; i<2*n; i++){
		deg[i] = (int)adj[i].size();
		s.insert({deg[i], i});
	}

	while(!s.empty()){
		int v = (*s.begin()).S;
		s.erase(s.begin());

		if(deg[v] <= 0)
			return printf("NO\n"), 0;

		if(deg[v] == 1){
			mark[v] = true;
			for(auto u : adj[v]){
				if(mark[u])continue;
				mark[u] = true;
				for(auto x : adj[u]){
					if(mark[x])continue;
					s.erase({deg[x], x});
					deg[x]--;
					s.insert({deg[x], x});
				}
				if(v < n)
					suml += p[u];
				else sumr += p[u];
			}
		}
		else break;
	}

	int cnt = 0;

	for(int i=0; i<2*n; i++){
		if(mark[i])continue;
		dfs(i, cnt);
		cnt++;
	}

	dp[suml] = 1;
	for(int i=0; i<cnt; i++){
		foo = dp;
		dp.reset();
		dp |= foo << (vl[i].F);
		dp |= foo << (vl[i].S);
	}

	for(int i=(sum-k+1)/2; i<=(sum+k)/2; i++)
		if(dp[i])
			return printf("YES\n"), 0;
	return printf("NO\n"), 0;

}

Compilation message

tug.cpp: In function 'int main()':
tug.cpp:48:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &k);
                        ^
tug.cpp:50:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int l, r; scanf("%d %d", &l, &r);
                                   ^
tug.cpp:53:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &p[pe(i)]); sum += p[pe(i)];
                         ^

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7060 KB Output is correct
2 Correct 3 ms 7056 KB Output is correct
3 Correct 3 ms 7056 KB Output is correct
4 Correct 3 ms 7060 KB Output is correct
5 Correct 3 ms 7056 KB Output is correct
6 Correct 3 ms 7056 KB Output is correct
7 Correct 0 ms 7060 KB Output is correct
8 Correct 3 ms 7060 KB Output is correct
9 Correct 3 ms 7060 KB Output is correct
10 Correct 3 ms 7056 KB Output is correct
11 Correct 3 ms 7060 KB Output is correct
12 Correct 3 ms 7060 KB Output is correct
13 Correct 3 ms 7060 KB Output is correct
14 Correct 3 ms 7056 KB Output is correct
15 Correct 3 ms 7060 KB Output is correct
16 Correct 0 ms 7056 KB Output is correct
17 Correct 3 ms 7056 KB Output is correct
18 Correct 3 ms 7056 KB Output is correct
19 Correct 3 ms 7060 KB Output is correct
20 Correct 3 ms 7060 KB Output is correct
21 Correct 0 ms 7060 KB Output is correct
22 Correct 0 ms 7056 KB Output is correct
23 Correct 3 ms 7056 KB Output is correct
24 Correct 0 ms 7060 KB Output is correct
25 Correct 0 ms 7056 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7060 KB Output is correct
2 Correct 3 ms 7056 KB Output is correct
3 Correct 3 ms 7056 KB Output is correct
4 Correct 3 ms 7060 KB Output is correct
5 Correct 3 ms 7056 KB Output is correct
6 Correct 3 ms 7056 KB Output is correct
7 Correct 0 ms 7060 KB Output is correct
8 Correct 3 ms 7060 KB Output is correct
9 Correct 3 ms 7060 KB Output is correct
10 Correct 3 ms 7056 KB Output is correct
11 Correct 3 ms 7060 KB Output is correct
12 Correct 3 ms 7060 KB Output is correct
13 Correct 3 ms 7060 KB Output is correct
14 Correct 3 ms 7056 KB Output is correct
15 Correct 3 ms 7060 KB Output is correct
16 Correct 0 ms 7056 KB Output is correct
17 Correct 3 ms 7056 KB Output is correct
18 Correct 3 ms 7056 KB Output is correct
19 Correct 3 ms 7060 KB Output is correct
20 Correct 3 ms 7060 KB Output is correct
21 Correct 0 ms 7060 KB Output is correct
22 Correct 0 ms 7056 KB Output is correct
23 Correct 3 ms 7056 KB Output is correct
24 Correct 0 ms 7060 KB Output is correct
25 Correct 0 ms 7056 KB Output is correct
26 Correct 363 ms 7456 KB Output is correct
27 Correct 56 ms 7456 KB Output is correct
28 Correct 349 ms 7452 KB Output is correct
29 Correct 53 ms 7456 KB Output is correct
30 Correct 376 ms 7456 KB Output is correct
31 Correct 49 ms 7452 KB Output is correct
32 Correct 373 ms 7452 KB Output is correct
33 Correct 53 ms 7456 KB Output is correct
34 Correct 33 ms 7460 KB Output is correct
35 Correct 56 ms 7452 KB Output is correct
36 Correct 349 ms 7452 KB Output is correct
37 Correct 59 ms 7452 KB Output is correct
38 Correct 349 ms 7452 KB Output is correct
39 Correct 53 ms 7452 KB Output is correct
40 Correct 363 ms 7456 KB Output is correct
41 Correct 49 ms 7452 KB Output is correct
42 Correct 363 ms 7456 KB Output is correct
43 Correct 49 ms 7452 KB Output is correct
44 Correct 329 ms 7456 KB Output is correct
45 Correct 53 ms 7452 KB Output is correct
46 Correct 363 ms 7452 KB Output is correct
47 Correct 3 ms 7456 KB Output is correct
48 Correct 176 ms 7456 KB Output is correct
49 Correct 176 ms 7456 KB Output is correct
50 Correct 326 ms 7452 KB Output is correct
51 Correct 373 ms 7456 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1726 ms 9304 KB Output is correct
2 Correct 19 ms 9300 KB Output is correct
3 Correct 1726 ms 9300 KB Output is correct
4 Correct 16 ms 9304 KB Output is correct
5 Correct 1766 ms 9304 KB Output is correct
6 Correct 16 ms 9300 KB Output is correct
7 Correct 1726 ms 9300 KB Output is correct
8 Correct 13 ms 9300 KB Output is correct
9 Correct 1706 ms 9304 KB Output is correct
10 Correct 23 ms 9304 KB Output is correct
11 Correct 1823 ms 9304 KB Output is correct
12 Correct 16 ms 9308 KB Output is correct
13 Correct 1719 ms 9304 KB Output is correct
14 Correct 1759 ms 9300 KB Output is correct
15 Correct 16 ms 9304 KB Output is correct
16 Correct 1833 ms 9304 KB Output is correct
17 Correct 23 ms 9300 KB Output is correct
18 Correct 1839 ms 9304 KB Output is correct
19 Correct 19 ms 9304 KB Output is correct
20 Correct 1793 ms 9304 KB Output is correct
21 Correct 19 ms 9172 KB Output is correct
22 Correct 916 ms 9300 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7060 KB Output is correct
2 Correct 3 ms 7056 KB Output is correct
3 Correct 3 ms 7056 KB Output is correct
4 Correct 3 ms 7060 KB Output is correct
5 Correct 3 ms 7056 KB Output is correct
6 Correct 3 ms 7056 KB Output is correct
7 Correct 0 ms 7060 KB Output is correct
8 Correct 3 ms 7060 KB Output is correct
9 Correct 3 ms 7060 KB Output is correct
10 Correct 3 ms 7056 KB Output is correct
11 Correct 3 ms 7060 KB Output is correct
12 Correct 3 ms 7060 KB Output is correct
13 Correct 3 ms 7060 KB Output is correct
14 Correct 3 ms 7056 KB Output is correct
15 Correct 3 ms 7060 KB Output is correct
16 Correct 0 ms 7056 KB Output is correct
17 Correct 3 ms 7056 KB Output is correct
18 Correct 3 ms 7056 KB Output is correct
19 Correct 3 ms 7060 KB Output is correct
20 Correct 3 ms 7060 KB Output is correct
21 Correct 0 ms 7060 KB Output is correct
22 Correct 0 ms 7056 KB Output is correct
23 Correct 3 ms 7056 KB Output is correct
24 Correct 0 ms 7060 KB Output is correct
25 Correct 0 ms 7056 KB Output is correct
26 Correct 363 ms 7456 KB Output is correct
27 Correct 56 ms 7456 KB Output is correct
28 Correct 349 ms 7452 KB Output is correct
29 Correct 53 ms 7456 KB Output is correct
30 Correct 376 ms 7456 KB Output is correct
31 Correct 49 ms 7452 KB Output is correct
32 Correct 373 ms 7452 KB Output is correct
33 Correct 53 ms 7456 KB Output is correct
34 Correct 33 ms 7460 KB Output is correct
35 Correct 56 ms 7452 KB Output is correct
36 Correct 349 ms 7452 KB Output is correct
37 Correct 59 ms 7452 KB Output is correct
38 Correct 349 ms 7452 KB Output is correct
39 Correct 53 ms 7452 KB Output is correct
40 Correct 363 ms 7456 KB Output is correct
41 Correct 49 ms 7452 KB Output is correct
42 Correct 363 ms 7456 KB Output is correct
43 Correct 49 ms 7452 KB Output is correct
44 Correct 329 ms 7456 KB Output is correct
45 Correct 53 ms 7452 KB Output is correct
46 Correct 363 ms 7452 KB Output is correct
47 Correct 3 ms 7456 KB Output is correct
48 Correct 176 ms 7456 KB Output is correct
49 Correct 176 ms 7456 KB Output is correct
50 Correct 326 ms 7452 KB Output is correct
51 Correct 373 ms 7456 KB Output is correct
52 Correct 1726 ms 9304 KB Output is correct
53 Correct 19 ms 9300 KB Output is correct
54 Correct 1726 ms 9300 KB Output is correct
55 Correct 16 ms 9304 KB Output is correct
56 Correct 1766 ms 9304 KB Output is correct
57 Correct 16 ms 9300 KB Output is correct
58 Correct 1726 ms 9300 KB Output is correct
59 Correct 13 ms 9300 KB Output is correct
60 Correct 1706 ms 9304 KB Output is correct
61 Correct 23 ms 9304 KB Output is correct
62 Correct 1823 ms 9304 KB Output is correct
63 Correct 16 ms 9308 KB Output is correct
64 Correct 1719 ms 9304 KB Output is correct
65 Correct 1759 ms 9300 KB Output is correct
66 Correct 16 ms 9304 KB Output is correct
67 Correct 1833 ms 9304 KB Output is correct
68 Correct 23 ms 9300 KB Output is correct
69 Correct 1839 ms 9304 KB Output is correct
70 Correct 19 ms 9304 KB Output is correct
71 Correct 1793 ms 9304 KB Output is correct
72 Correct 19 ms 9172 KB Output is correct
73 Correct 916 ms 9300 KB Output is correct
74 Execution timed out 3000 ms 13656 KB Execution timed out
75 Halted 0 ms 0 KB -