oj.uz

Submission #1070582

# Submission time Handle Problem Language Result Execution time Memory
1070582 2024-08-22T15:38:11 Z AdamGS Tug of War (BOI15_tug) C++17
100 / 100
 2260 ms 6844 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=3e4+7;
vector<int>P;
bitset<LIM*80>B;
vector<pair<int,int>>V[2*LIM];
int F[2*LIM], ile[2*LIM], usun[2*LIM], odw[2*LIM], n, sum, akt;
int fnd(int x) {
	if(F[x]==x) return x;
	return F[x]=fnd(F[x]);
}
void uni(int a, int b) {
	a=fnd(a); b=fnd(b);
	if(a!=b) {
		ile[a]+=ile[b];
		F[b]=a;
	}
	--ile[a];
}
void DFS(int x) {
	odw[x]=1;
	int p=0;
	for(auto i : V[x]) if(!odw[i.st] && !usun[i.st]) {
		++p;
		if(p==2) {
			if(i.st<n) akt+=i.nd; else akt-=i.nd;
		}
	}
	for(auto i : V[x]) if(!odw[i.st] && !usun[i.st]) {
		if(x<n) akt+=i.nd; else akt-=i.nd;
		DFS(i.st);
	}
}
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	int k;
	cin >> n >> k;
	rep(i, 2*n) {
		F[i]=i;
		ile[i]=1;
	}
	rep(i, 2*n) {
		int a, b, c;
		cin >> a >> b >> c; --a; --b; b+=n;
		V[a].pb({b, c});
		V[b].pb({a, c});
		uni(a, b);
	}
	rep(i, 2*n) if(ile[fnd(i)]<0) {
		cout << "NO\n";
		return 0;
	}
	rep(i, 2*n) ile[i]=V[i].size();
	queue<int>q;
	rep(i, 2*n) if(ile[i]==1) q.push(i);
	while(!q.empty()) {
		int p=q.front(); q.pop();
		usun[p]=1;
		for(auto i : V[p]) if(!usun[i.st]) {
			--ile[i.st];
			if(ile[i.st]==1) q.push(i.st);
			if(p<n) sum+=i.nd; else sum-=i.nd;
		}
	}
	rep(i, 2*n) if(!usun[i] && !odw[i]) {
		akt=0;
		DFS(i);
		P.pb(abs(akt));
	}
	sum=abs(sum);
	int S=0;
	B[0]=1;
	for(auto i : P) {
		S+=i;
		B|=B<<i;
	}
	rep(i, 80*LIM) if(B[i]) {
		int a=sum+i, b=S-i;
		if(abs(a-b)<=k) {
			cout << "YES\n";
			return 0;
		}
	}
	cout << "NO\n";
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 4 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 3 ms 3420 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 2 ms 3420 KB Output is correct
9 Correct 3 ms 3420 KB Output is correct
10 Correct 3 ms 3420 KB Output is correct
11 Correct 2 ms 3416 KB Output is correct
12 Correct 2 ms 3416 KB Output is correct
13 Correct 2 ms 3420 KB Output is correct
14 Correct 2 ms 3420 KB Output is correct
15 Correct 2 ms 3420 KB Output is correct
16 Correct 3 ms 3420 KB Output is correct
17 Correct 2 ms 3420 KB Output is correct
18 Correct 2 ms 3420 KB Output is correct
19 Correct 2 ms 3512 KB Output is correct
20 Correct 1 ms 3420 KB Output is correct
21 Correct 1 ms 3164 KB Output is correct
22 Correct 2 ms 3420 KB Output is correct
23 Correct 3 ms 3420 KB Output is correct
24 Correct 2 ms 3352 KB Output is correct
25 Correct 4 ms 3420 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 4 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 3 ms 3420 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 2 ms 3420 KB Output is correct
9 Correct 3 ms 3420 KB Output is correct
10 Correct 3 ms 3420 KB Output is correct
11 Correct 2 ms 3416 KB Output is correct
12 Correct 2 ms 3416 KB Output is correct
13 Correct 2 ms 3420 KB Output is correct
14 Correct 2 ms 3420 KB Output is correct
15 Correct 2 ms 3420 KB Output is correct
16 Correct 3 ms 3420 KB Output is correct
17 Correct 2 ms 3420 KB Output is correct
18 Correct 2 ms 3420 KB Output is correct
19 Correct 2 ms 3512 KB Output is correct
20 Correct 1 ms 3420 KB Output is correct
21 Correct 1 ms 3164 KB Output is correct
22 Correct 2 ms 3420 KB Output is correct
23 Correct 3 ms 3420 KB Output is correct
24 Correct 2 ms 3352 KB Output is correct
25 Correct 4 ms 3420 KB Output is correct
26 Correct 116 ms 3672 KB Output is correct
27 Correct 20 ms 3676 KB Output is correct
28 Correct 117 ms 3676 KB Output is correct
29 Correct 19 ms 3672 KB Output is correct
30 Correct 123 ms 3692 KB Output is correct
31 Correct 20 ms 2904 KB Output is correct
32 Correct 123 ms 2908 KB Output is correct
33 Correct 20 ms 2908 KB Output is correct
34 Correct 11 ms 2908 KB Output is correct
35 Correct 21 ms 2908 KB Output is correct
36 Correct 128 ms 2904 KB Output is correct
37 Correct 22 ms 2908 KB Output is correct
38 Correct 139 ms 2908 KB Output is correct
39 Correct 21 ms 2908 KB Output is correct
40 Correct 132 ms 2908 KB Output is correct
41 Correct 20 ms 3676 KB Output is correct
42 Correct 124 ms 3692 KB Output is correct
43 Correct 27 ms 2984 KB Output is correct
44 Correct 127 ms 2972 KB Output is correct
45 Correct 23 ms 2984 KB Output is correct
46 Correct 156 ms 2908 KB Output is correct
47 Correct 2 ms 2652 KB Output is correct
48 Correct 64 ms 3016 KB Output is correct
49 Correct 74 ms 3016 KB Output is correct
50 Correct 149 ms 2908 KB Output is correct
51 Correct 135 ms 2908 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 376 ms 3932 KB Output is correct
2 Correct 10 ms 3416 KB Output is correct
3 Correct 379 ms 3852 KB Output is correct
4 Correct 8 ms 3428 KB Output is correct
5 Correct 384 ms 3940 KB Output is correct
6 Correct 6 ms 3420 KB Output is correct
7 Correct 450 ms 3928 KB Output is correct
8 Correct 9 ms 3416 KB Output is correct
9 Correct 404 ms 3940 KB Output is correct
10 Correct 11 ms 3500 KB Output is correct
11 Correct 426 ms 3932 KB Output is correct
12 Correct 7 ms 3420 KB Output is correct
13 Correct 400 ms 3852 KB Output is correct
14 Correct 378 ms 3932 KB Output is correct
15 Correct 6 ms 3416 KB Output is correct
16 Correct 394 ms 3928 KB Output is correct
17 Correct 11 ms 3420 KB Output is correct
18 Correct 378 ms 3932 KB Output is correct
19 Correct 6 ms 3416 KB Output is correct
20 Correct 366 ms 3932 KB Output is correct
21 Correct 9 ms 3332 KB Output is correct
22 Correct 217 ms 3932 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 4 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 4 ms 2716 KB Output is correct
6 Correct 3 ms 3420 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 2 ms 3420 KB Output is correct
9 Correct 3 ms 3420 KB Output is correct
10 Correct 3 ms 3420 KB Output is correct
11 Correct 2 ms 3416 KB Output is correct
12 Correct 2 ms 3416 KB Output is correct
13 Correct 2 ms 3420 KB Output is correct
14 Correct 2 ms 3420 KB Output is correct
15 Correct 2 ms 3420 KB Output is correct
16 Correct 3 ms 3420 KB Output is correct
17 Correct 2 ms 3420 KB Output is correct
18 Correct 2 ms 3420 KB Output is correct
19 Correct 2 ms 3512 KB Output is correct
20 Correct 1 ms 3420 KB Output is correct
21 Correct 1 ms 3164 KB Output is correct
22 Correct 2 ms 3420 KB Output is correct
23 Correct 3 ms 3420 KB Output is correct
24 Correct 2 ms 3352 KB Output is correct
25 Correct 4 ms 3420 KB Output is correct
26 Correct 116 ms 3672 KB Output is correct
27 Correct 20 ms 3676 KB Output is correct
28 Correct 117 ms 3676 KB Output is correct
29 Correct 19 ms 3672 KB Output is correct
30 Correct 123 ms 3692 KB Output is correct
31 Correct 20 ms 2904 KB Output is correct
32 Correct 123 ms 2908 KB Output is correct
33 Correct 20 ms 2908 KB Output is correct
34 Correct 11 ms 2908 KB Output is correct
35 Correct 21 ms 2908 KB Output is correct
36 Correct 128 ms 2904 KB Output is correct
37 Correct 22 ms 2908 KB Output is correct
38 Correct 139 ms 2908 KB Output is correct
39 Correct 21 ms 2908 KB Output is correct
40 Correct 132 ms 2908 KB Output is correct
41 Correct 20 ms 3676 KB Output is correct
42 Correct 124 ms 3692 KB Output is correct
43 Correct 27 ms 2984 KB Output is correct
44 Correct 127 ms 2972 KB Output is correct
45 Correct 23 ms 2984 KB Output is correct
46 Correct 156 ms 2908 KB Output is correct
47 Correct 2 ms 2652 KB Output is correct
48 Correct 64 ms 3016 KB Output is correct
49 Correct 74 ms 3016 KB Output is correct
50 Correct 149 ms 2908 KB Output is correct
51 Correct 135 ms 2908 KB Output is correct
52 Correct 376 ms 3932 KB Output is correct
53 Correct 10 ms 3416 KB Output is correct
54 Correct 379 ms 3852 KB Output is correct
55 Correct 8 ms 3428 KB Output is correct
56 Correct 384 ms 3940 KB Output is correct
57 Correct 6 ms 3420 KB Output is correct
58 Correct 450 ms 3928 KB Output is correct
59 Correct 9 ms 3416 KB Output is correct
60 Correct 404 ms 3940 KB Output is correct
61 Correct 11 ms 3500 KB Output is correct
62 Correct 426 ms 3932 KB Output is correct
63 Correct 7 ms 3420 KB Output is correct
64 Correct 400 ms 3852 KB Output is correct
65 Correct 378 ms 3932 KB Output is correct
66 Correct 6 ms 3416 KB Output is correct
67 Correct 394 ms 3928 KB Output is correct
68 Correct 11 ms 3420 KB Output is correct
69 Correct 378 ms 3932 KB Output is correct
70 Correct 6 ms 3416 KB Output is correct
71 Correct 366 ms 3932 KB Output is correct
72 Correct 9 ms 3332 KB Output is correct
73 Correct 217 ms 3932 KB Output is correct
74 Correct 1769 ms 6232 KB Output is correct
75 Correct 87 ms 5988 KB Output is correct
76 Correct 1905 ms 6380 KB Output is correct
77 Correct 89 ms 6088 KB Output is correct
78 Correct 1847 ms 6376 KB Output is correct
79 Correct 1960 ms 6376 KB Output is correct
80 Correct 88 ms 5976 KB Output is correct
81 Correct 92 ms 6128 KB Output is correct
82 Correct 1814 ms 6376 KB Output is correct
83 Correct 1958 ms 6376 KB Output is correct
84 Correct 96 ms 5976 KB Output is correct
85 Correct 1919 ms 6376 KB Output is correct
86 Correct 93 ms 5980 KB Output is correct
87 Correct 1983 ms 6376 KB Output is correct
88 Correct 88 ms 5980 KB Output is correct
89 Correct 2054 ms 6236 KB Output is correct
90 Correct 161 ms 6144 KB Output is correct
91 Correct 2260 ms 6380 KB Output is correct
92 Correct 167 ms 5972 KB Output is correct
93 Correct 2053 ms 6376 KB Output is correct
94 Correct 26 ms 5720 KB Output is correct
95 Correct 1084 ms 6836 KB Output is correct
96 Correct 996 ms 6844 KB Output is correct
97 Correct 1989 ms 6384 KB Output is correct
98 Correct 1987 ms 6368 KB Output is correct