답안 #198461

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
198461	2020-01-26T06:32:30 Z	dndhk	Tug of War (BOI15_tug)	C++14	100 / 100	2397 ms	5780 KB

#include <bits/stdc++.h>

#define pb push_back

using namespace std;

const int MAX_N = 60000;

typedef pair<int, int> pii;

int N, K;
bool fin = false;
int c[MAX_N+1];
vector<pii> gp[MAX_N+1];

bool chk[MAX_N+1];
bool vst[MAX_N+1];

int S;
vector<int> vt;
vector<pii> v;

bitset<MAX_N*20+1> bt;

bool dfs(int x){
	vst[x] = true;
	for(pii i : gp[x]){
		if(chk[i.second])	continue;
		chk[i.second] = true;
		if(vst[i.first]){
			int sum = 0;
			if(x>N) sum+=c[i.second];
			else sum-=c[i.second];
			while(!v.empty()){
				if(v.back().first>N){
					sum+=v.back().second;
				}else{
					sum-=v.back().second;
				}
				if(v.back().first==i.first){
					vt.pb((sum>0?sum:-sum));
					sum = 0;
				}
				v.pop_back();
			}
			S+=sum;
			return true;
		}else{
			v.pb({x, c[i.second]});
			if(dfs(i.first)){
				return true;
			}
		}
	}
	if(!v.empty()){
		if(x>N){
			S += v.back().second;
		}else{
			S -= v.back().second;
		}
		v.pop_back();
		return false;
	}
	fin = true;
	return true;
}

int main(){
	scanf("%d%d", &N, &K);
	//cout<<N<<" "<<K<<endl;
	for(int i=1; i<=N*2; i++){
		int l, r;
		scanf("%d%d%d", &l, &r, &c[i]);
		//cout<<l<<" "<<r<<endl;
		r+=N;
		gp[l].pb({r, i});
		gp[r].pb({l, i});
	}
	for(int i=1; i<=N*2; i++){
		if(!vst[i]){
			dfs(i);
			if(fin==true){
				printf("NO");
				return 0;
			}
		}
	}
	if(S<0)	S*=-1;
	int S2 = 0;
	for(int i : vt)	S2 += i;
	// for(int i : vt){
	// 	cout<<i<<endl;
	// }
	bt[0] = true;
	int s = (S2-K-S+1)/2, e = (S2-S+K)/2;
	if(S2-S+K<0){
		printf("NO");
		return 0;
	}
	//cout<<S<<" "<<S2<<" "<<K<<endl;
	s = max(s, 0);
	for(int i : vt){
		bt = (bt | (bt<<i));
	}
	for(int j=s; j<=e; j++){
		//cout<<j<<" "<<bt[j]<<endl;
		if(bt[j]){
			printf("YES");
			return 0;
		}
	}
	printf("NO");
	return 0;
}

Compilation message

tug.cpp: In function 'int main()':
tug.cpp:69:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~
tug.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &l, &r, &c[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	2296 KB	Output is correct
2	Correct	7 ms	2296 KB	Output is correct
3	Correct	7 ms	2296 KB	Output is correct
4	Correct	7 ms	2296 KB	Output is correct
5	Correct	8 ms	2300 KB	Output is correct
6	Correct	7 ms	2296 KB	Output is correct
7	Correct	7 ms	2296 KB	Output is correct
8	Correct	7 ms	2296 KB	Output is correct
9	Correct	7 ms	2300 KB	Output is correct
10	Correct	7 ms	2296 KB	Output is correct
11	Correct	7 ms	2296 KB	Output is correct
12	Correct	8 ms	2424 KB	Output is correct
13	Correct	7 ms	2296 KB	Output is correct
14	Correct	7 ms	2296 KB	Output is correct
15	Correct	7 ms	2296 KB	Output is correct
16	Correct	7 ms	2296 KB	Output is correct
17	Correct	7 ms	2296 KB	Output is correct
18	Correct	7 ms	2296 KB	Output is correct
19	Correct	8 ms	2296 KB	Output is correct
20	Correct	7 ms	2296 KB	Output is correct
21	Correct	6 ms	1784 KB	Output is correct
22	Correct	7 ms	2296 KB	Output is correct
23	Correct	7 ms	2424 KB	Output is correct
24	Correct	7 ms	2296 KB	Output is correct
25	Correct	8 ms	2296 KB	Output is correct

Subtask #2
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	2296 KB	Output is correct
2	Correct	7 ms	2296 KB	Output is correct
3	Correct	7 ms	2296 KB	Output is correct
4	Correct	7 ms	2296 KB	Output is correct
5	Correct	8 ms	2300 KB	Output is correct
6	Correct	7 ms	2296 KB	Output is correct
7	Correct	7 ms	2296 KB	Output is correct
8	Correct	7 ms	2296 KB	Output is correct
9	Correct	7 ms	2300 KB	Output is correct
10	Correct	7 ms	2296 KB	Output is correct
11	Correct	7 ms	2296 KB	Output is correct
12	Correct	8 ms	2424 KB	Output is correct
13	Correct	7 ms	2296 KB	Output is correct
14	Correct	7 ms	2296 KB	Output is correct
15	Correct	7 ms	2296 KB	Output is correct
16	Correct	7 ms	2296 KB	Output is correct
17	Correct	7 ms	2296 KB	Output is correct
18	Correct	7 ms	2296 KB	Output is correct
19	Correct	8 ms	2296 KB	Output is correct
20	Correct	7 ms	2296 KB	Output is correct
21	Correct	6 ms	1784 KB	Output is correct
22	Correct	7 ms	2296 KB	Output is correct
23	Correct	7 ms	2424 KB	Output is correct
24	Correct	7 ms	2296 KB	Output is correct
25	Correct	8 ms	2296 KB	Output is correct
26	Correct	154 ms	2424 KB	Output is correct
27	Correct	28 ms	2424 KB	Output is correct
28	Correct	150 ms	2424 KB	Output is correct
29	Correct	29 ms	2424 KB	Output is correct
30	Correct	156 ms	2552 KB	Output is correct
31	Correct	27 ms	2424 KB	Output is correct
32	Correct	155 ms	2424 KB	Output is correct
33	Correct	28 ms	2552 KB	Output is correct
34	Correct	18 ms	2424 KB	Output is correct
35	Correct	30 ms	2424 KB	Output is correct
36	Correct	158 ms	2536 KB	Output is correct
37	Correct	28 ms	2424 KB	Output is correct
38	Correct	153 ms	2540 KB	Output is correct
39	Correct	28 ms	2424 KB	Output is correct
40	Correct	169 ms	2424 KB	Output is correct
41	Correct	28 ms	2424 KB	Output is correct
42	Correct	155 ms	2424 KB	Output is correct
43	Correct	28 ms	2552 KB	Output is correct
44	Correct	148 ms	2552 KB	Output is correct
45	Correct	29 ms	2424 KB	Output is correct
46	Correct	146 ms	2424 KB	Output is correct
47	Correct	8 ms	1912 KB	Output is correct
48	Correct	80 ms	2424 KB	Output is correct
49	Correct	9 ms	1912 KB	Output is correct
50	Correct	157 ms	2584 KB	Output is correct
51	Correct	159 ms	2556 KB	Output is correct

Subtask #3
23.0 / 23.0

#	결과	실행 시간	메모리	Grader output
1	Correct	516 ms	3248 KB	Output is correct
2	Correct	17 ms	2808 KB	Output is correct
3	Correct	532 ms	3220 KB	Output is correct
4	Correct	17 ms	2552 KB	Output is correct
5	Correct	555 ms	3216 KB	Output is correct
6	Correct	16 ms	2552 KB	Output is correct
7	Correct	587 ms	3216 KB	Output is correct
8	Correct	17 ms	2552 KB	Output is correct
9	Correct	537 ms	3192 KB	Output is correct
10	Correct	17 ms	2552 KB	Output is correct
11	Correct	549 ms	3224 KB	Output is correct
12	Correct	16 ms	2680 KB	Output is correct
13	Correct	513 ms	3320 KB	Output is correct
14	Correct	569 ms	3320 KB	Output is correct
15	Correct	16 ms	2552 KB	Output is correct
16	Correct	530 ms	3188 KB	Output is correct
17	Correct	16 ms	2552 KB	Output is correct
18	Correct	537 ms	3320 KB	Output is correct
19	Correct	17 ms	2552 KB	Output is correct
20	Correct	570 ms	3320 KB	Output is correct
21	Correct	16 ms	2552 KB	Output is correct
22	Correct	256 ms	3320 KB	Output is correct

Subtask #4
29.0 / 29.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	2296 KB	Output is correct
2	Correct	7 ms	2296 KB	Output is correct
3	Correct	7 ms	2296 KB	Output is correct
4	Correct	7 ms	2296 KB	Output is correct
5	Correct	8 ms	2300 KB	Output is correct
6	Correct	7 ms	2296 KB	Output is correct
7	Correct	7 ms	2296 KB	Output is correct
8	Correct	7 ms	2296 KB	Output is correct
9	Correct	7 ms	2300 KB	Output is correct
10	Correct	7 ms	2296 KB	Output is correct
11	Correct	7 ms	2296 KB	Output is correct
12	Correct	8 ms	2424 KB	Output is correct
13	Correct	7 ms	2296 KB	Output is correct
14	Correct	7 ms	2296 KB	Output is correct
15	Correct	7 ms	2296 KB	Output is correct
16	Correct	7 ms	2296 KB	Output is correct
17	Correct	7 ms	2296 KB	Output is correct
18	Correct	7 ms	2296 KB	Output is correct
19	Correct	8 ms	2296 KB	Output is correct
20	Correct	7 ms	2296 KB	Output is correct
21	Correct	6 ms	1784 KB	Output is correct
22	Correct	7 ms	2296 KB	Output is correct
23	Correct	7 ms	2424 KB	Output is correct
24	Correct	7 ms	2296 KB	Output is correct
25	Correct	8 ms	2296 KB	Output is correct
26	Correct	154 ms	2424 KB	Output is correct
27	Correct	28 ms	2424 KB	Output is correct
28	Correct	150 ms	2424 KB	Output is correct
29	Correct	29 ms	2424 KB	Output is correct
30	Correct	156 ms	2552 KB	Output is correct
31	Correct	27 ms	2424 KB	Output is correct
32	Correct	155 ms	2424 KB	Output is correct
33	Correct	28 ms	2552 KB	Output is correct
34	Correct	18 ms	2424 KB	Output is correct
35	Correct	30 ms	2424 KB	Output is correct
36	Correct	158 ms	2536 KB	Output is correct
37	Correct	28 ms	2424 KB	Output is correct
38	Correct	153 ms	2540 KB	Output is correct
39	Correct	28 ms	2424 KB	Output is correct
40	Correct	169 ms	2424 KB	Output is correct
41	Correct	28 ms	2424 KB	Output is correct
42	Correct	155 ms	2424 KB	Output is correct
43	Correct	28 ms	2552 KB	Output is correct
44	Correct	148 ms	2552 KB	Output is correct
45	Correct	29 ms	2424 KB	Output is correct
46	Correct	146 ms	2424 KB	Output is correct
47	Correct	8 ms	1912 KB	Output is correct
48	Correct	80 ms	2424 KB	Output is correct
49	Correct	9 ms	1912 KB	Output is correct
50	Correct	157 ms	2584 KB	Output is correct
51	Correct	159 ms	2556 KB	Output is correct
52	Correct	516 ms	3248 KB	Output is correct
53	Correct	17 ms	2808 KB	Output is correct
54	Correct	532 ms	3220 KB	Output is correct
55	Correct	17 ms	2552 KB	Output is correct
56	Correct	555 ms	3216 KB	Output is correct
57	Correct	16 ms	2552 KB	Output is correct
58	Correct	587 ms	3216 KB	Output is correct
59	Correct	17 ms	2552 KB	Output is correct
60	Correct	537 ms	3192 KB	Output is correct
61	Correct	17 ms	2552 KB	Output is correct
62	Correct	549 ms	3224 KB	Output is correct
63	Correct	16 ms	2680 KB	Output is correct
64	Correct	513 ms	3320 KB	Output is correct
65	Correct	569 ms	3320 KB	Output is correct
66	Correct	16 ms	2552 KB	Output is correct
67	Correct	530 ms	3188 KB	Output is correct
68	Correct	16 ms	2552 KB	Output is correct
69	Correct	537 ms	3320 KB	Output is correct
70	Correct	17 ms	2552 KB	Output is correct
71	Correct	570 ms	3320 KB	Output is correct
72	Correct	16 ms	2552 KB	Output is correct
73	Correct	256 ms	3320 KB	Output is correct
74	Correct	2274 ms	5624 KB	Output is correct
75	Correct	127 ms	5368 KB	Output is correct
76	Correct	2233 ms	5624 KB	Output is correct
77	Correct	152 ms	5496 KB	Output is correct
78	Correct	2190 ms	5628 KB	Output is correct
79	Correct	2282 ms	5624 KB	Output is correct
80	Correct	135 ms	5368 KB	Output is correct
81	Correct	128 ms	5496 KB	Output is correct
82	Correct	2211 ms	5624 KB	Output is correct
83	Correct	2397 ms	5752 KB	Output is correct
84	Correct	132 ms	5496 KB	Output is correct
85	Correct	2259 ms	5624 KB	Output is correct
86	Correct	127 ms	5368 KB	Output is correct
87	Correct	2224 ms	5624 KB	Output is correct
88	Correct	135 ms	5496 KB	Output is correct
89	Correct	2235 ms	5624 KB	Output is correct
90	Correct	131 ms	5368 KB	Output is correct
91	Correct	2236 ms	5624 KB	Output is correct
92	Correct	136 ms	5368 KB	Output is correct
93	Correct	2332 ms	5624 KB	Output is correct
94	Correct	47 ms	4856 KB	Output is correct
95	Correct	1101 ms	5780 KB	Output is correct
96	Correct	47 ms	5240 KB	Output is correct
97	Correct	2194 ms	5624 KB	Output is correct
98	Correct	2224 ms	5624 KB	Output is correct

답안 #198461

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 30.0 / 30.0

Subtask #3 23.0 / 23.0

Subtask #4 29.0 / 29.0

Subtask #1
18.0 / 18.0

Subtask #2
30.0 / 30.0

Subtask #3
23.0 / 23.0

Subtask #4
29.0 / 29.0