oj.uz

Submission #682172

# Submission time Handle Problem Language Result Execution time Memory
682172 2023-01-16T03:41:34 Z jamezzz Stranded Far From Home (BOI22_island) C++17
100 / 100
 193 ms 24424 KB 
#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#define dbg(...) printf(__VA_ARGS__);
#define getchar_unlocked getchar
#else
#define dbg(...)
#endif
#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb push_back
#define psf push_front
#define ppb pop_back
#define ppf pop_front
#define sz(x) (int)x.size()
#define mnto(x,y) x=min(x,(__typeof__(x))y)
#define mxto(x,y) x=max(x,(__typeof__(x))y)
#define INF 1023456789
#define LINF 1023456789123456789
#define all(x) x.begin(),x.end()
#define lb(x,v) (lower_bound(all(x),v)-x.begin())
#define ub(x,v) (upper_bound(all(x),v)-x.begin())
#define disc(x) sort(all(x));x.resize(unique(all(x))-x.begin());
typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
typedef pair<ll,ll> pll;
typedef tuple<int,int,int> iii;
typedef tuple<int,int,int,int> iiii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
mt19937 rng(time(0));

#define mod 1000000007

inline int add(int a,int b){
	int r=a+b;
	while(r>=mod)r-=mod;
	while(r<0)r+=mod;
	return r;
}

inline int mult(int a,int b){
	return (int)(((ll)(a*b))%mod);
}

inline int rd(){
	int x=0;
	char ch=getchar_unlocked();
	while(!(ch&16))ch=getchar();//keep reading while current character is whitespace
    while(ch&16){//this will break when ‘\n’ or ‘ ‘ is encountered
		x=(x<<3)+(x<<1)+(ch&15);
		ch=getchar_unlocked();
	}
	return x;
}

#define maxn 200005

int n,m,s[maxn],p[maxn],rnk[maxn];
ll tot[maxn];
bool good[maxn];
vi ans[maxn];
vii EL;

int fp(int i){
	return p[i]==i?i:p[i]=fp(p[i]);
}

int join(int x,int y){
	x=fp(x),y=fp(y);
	if(rnk[x]<rnk[y])p[x]=y;
	else p[y]=x;
	if(rnk[x]==rnk[y])++rnk[x];
	return p[x];
}

int main(){
	sf("%d%d",&n,&m);
	for(int i=0;i<n;++i){
		sf("%d",&s[i]);
		ans[i].pb(i);
		p[i]=i,rnk[i]=0;
		tot[i]=s[i];
	}
	for(int i=0;i<m;++i){
		int a,b;
		sf("%d%d",&a,&b);
		--a,--b;
		if(s[a]>s[b])swap(a,b);
		EL.pb({a,b});
	}
	sort(all(EL),[&](ii &a,ii &b){
		return s[a.se]==s[b.se]?s[a.fi]<s[b.fi]:s[a.se]<s[b.se];
	});
	for(auto[u,v]:EL){
		//pf("edge: %d %d\n",u,v);
		int pu=fp(u),pv=fp(v);
		if(pu==pv)continue;
		int p=join(pu,pv);
		if(tot[pu]>=s[v]){
			vi tmp;
			swap(ans[pu],tmp);
			if(sz(tmp)<sz(ans[pv]))swap(tmp,ans[pv]);
			for(int i:ans[pv])tmp.pb(i);
			swap(tmp,ans[p]);
		}
		else{
			if(pu==p)swap(ans[pu],ans[pv]);
		}
		tot[p]=tot[pu]+tot[pv];
		vector<int> clr;
		if(pu==p)swap(ans[pv],clr);
		else swap(ans[pu],clr);
		
		/*
		pf("now:\n");
		for(int i=0;i<n;++i){
			pf("%d %d: ",i,tot[i]);
			for(int x:ans[i])pf("%d ",x);
			pf("\n");
		}
		*/
	}
	int p=fp(0);
	for(int i:ans[p]){
		good[i]=true;
	}
	for(int i=0;i<n;++i)pf("%d",good[i]);
	pf("\n");
}

Compilation message

island.cpp: In function 'int main()':
island.cpp:83:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |  sf("%d%d",&n,&m);
      |    ^
island.cpp:85:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |   sf("%d",&s[i]);
      |     ^
island.cpp:92:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |   sf("%d%d",&a,&b);
      |     ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5036 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5076 KB Output is correct
5 Correct 6 ms 5156 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 5 ms 5076 KB Output is correct
8 Correct 4 ms 5160 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 4 ms 5212 KB Output is correct
11 Correct 4 ms 5160 KB Output is correct
12 Correct 4 ms 5160 KB Output is correct
13 Correct 4 ms 5204 KB Output is correct
14 Correct 4 ms 5076 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 155 ms 17296 KB Output is correct
4 Correct 160 ms 21680 KB Output is correct
5 Correct 185 ms 21412 KB Output is correct
6 Correct 159 ms 21560 KB Output is correct
7 Correct 148 ms 21948 KB Output is correct
8 Correct 189 ms 24424 KB Output is correct
9 Correct 126 ms 21400 KB Output is correct
10 Correct 116 ms 20632 KB Output is correct
11 Correct 148 ms 22284 KB Output is correct
12 Correct 162 ms 20108 KB Output is correct
13 Correct 162 ms 21360 KB Output is correct
14 Correct 154 ms 21372 KB Output is correct
15 Correct 135 ms 21728 KB Output is correct
16 Correct 98 ms 20796 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 170 ms 17532 KB Output is correct
3 Correct 173 ms 22128 KB Output is correct
4 Correct 168 ms 23024 KB Output is correct
5 Correct 171 ms 20948 KB Output is correct
6 Correct 175 ms 22048 KB Output is correct
7 Correct 130 ms 21736 KB Output is correct
8 Correct 120 ms 21616 KB Output is correct
9 Correct 99 ms 20988 KB Output is correct
10 Correct 126 ms 20984 KB Output is correct
11 Correct 158 ms 21516 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 174 ms 18360 KB Output is correct
3 Correct 182 ms 22828 KB Output is correct
4 Correct 184 ms 23436 KB Output is correct
5 Correct 174 ms 23992 KB Output is correct
6 Correct 192 ms 23160 KB Output is correct
7 Correct 152 ms 23332 KB Output is correct
8 Correct 102 ms 20408 KB Output is correct
9 Correct 108 ms 14868 KB Output is correct
10 Correct 178 ms 22840 KB Output is correct
11 Correct 164 ms 21816 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5036 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 4 ms 5076 KB Output is correct
5 Correct 6 ms 5156 KB Output is correct
6 Correct 3 ms 5076 KB Output is correct
7 Correct 5 ms 5076 KB Output is correct
8 Correct 4 ms 5160 KB Output is correct
9 Correct 4 ms 5076 KB Output is correct
10 Correct 4 ms 5212 KB Output is correct
11 Correct 4 ms 5160 KB Output is correct
12 Correct 4 ms 5160 KB Output is correct
13 Correct 4 ms 5204 KB Output is correct
14 Correct 4 ms 5076 KB Output is correct
15 Correct 3 ms 4948 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 155 ms 17296 KB Output is correct
18 Correct 160 ms 21680 KB Output is correct
19 Correct 185 ms 21412 KB Output is correct
20 Correct 159 ms 21560 KB Output is correct
21 Correct 148 ms 21948 KB Output is correct
22 Correct 189 ms 24424 KB Output is correct
23 Correct 126 ms 21400 KB Output is correct
24 Correct 116 ms 20632 KB Output is correct
25 Correct 148 ms 22284 KB Output is correct
26 Correct 162 ms 20108 KB Output is correct
27 Correct 162 ms 21360 KB Output is correct
28 Correct 154 ms 21372 KB Output is correct
29 Correct 135 ms 21728 KB Output is correct
30 Correct 98 ms 20796 KB Output is correct
31 Correct 2 ms 4948 KB Output is correct
32 Correct 170 ms 17532 KB Output is correct
33 Correct 173 ms 22128 KB Output is correct
34 Correct 168 ms 23024 KB Output is correct
35 Correct 171 ms 20948 KB Output is correct
36 Correct 175 ms 22048 KB Output is correct
37 Correct 130 ms 21736 KB Output is correct
38 Correct 120 ms 21616 KB Output is correct
39 Correct 99 ms 20988 KB Output is correct
40 Correct 126 ms 20984 KB Output is correct
41 Correct 158 ms 21516 KB Output is correct
42 Correct 3 ms 4948 KB Output is correct
43 Correct 174 ms 18360 KB Output is correct
44 Correct 182 ms 22828 KB Output is correct
45 Correct 184 ms 23436 KB Output is correct
46 Correct 174 ms 23992 KB Output is correct
47 Correct 192 ms 23160 KB Output is correct
48 Correct 152 ms 23332 KB Output is correct
49 Correct 102 ms 20408 KB Output is correct
50 Correct 108 ms 14868 KB Output is correct
51 Correct 178 ms 22840 KB Output is correct
52 Correct 164 ms 21816 KB Output is correct
53 Correct 3 ms 4996 KB Output is correct
54 Correct 3 ms 5016 KB Output is correct
55 Correct 3 ms 4948 KB Output is correct
56 Correct 4 ms 5076 KB Output is correct
57 Correct 4 ms 5204 KB Output is correct
58 Correct 4 ms 5156 KB Output is correct
59 Correct 4 ms 5076 KB Output is correct
60 Correct 5 ms 5120 KB Output is correct
61 Correct 3 ms 5076 KB Output is correct
62 Correct 4 ms 5204 KB Output is correct
63 Correct 3 ms 5156 KB Output is correct
64 Correct 4 ms 5132 KB Output is correct
65 Correct 3 ms 5204 KB Output is correct
66 Correct 4 ms 5076 KB Output is correct
67 Correct 132 ms 21748 KB Output is correct
68 Correct 157 ms 21632 KB Output is correct
69 Correct 162 ms 21540 KB Output is correct
70 Correct 157 ms 21508 KB Output is correct
71 Correct 151 ms 22024 KB Output is correct
72 Correct 182 ms 24320 KB Output is correct
73 Correct 130 ms 21424 KB Output is correct
74 Correct 131 ms 20608 KB Output is correct
75 Correct 158 ms 22404 KB Output is correct
76 Correct 159 ms 20088 KB Output is correct
77 Correct 193 ms 21428 KB Output is correct
78 Correct 161 ms 21348 KB Output is correct
79 Correct 123 ms 21656 KB Output is correct
80 Correct 101 ms 20908 KB Output is correct
81 Correct 175 ms 22008 KB Output is correct
82 Correct 174 ms 22024 KB Output is correct
83 Correct 181 ms 23120 KB Output is correct
84 Correct 182 ms 21008 KB Output is correct
85 Correct 176 ms 22088 KB Output is correct
86 Correct 126 ms 21672 KB Output is correct
87 Correct 121 ms 21740 KB Output is correct
88 Correct 125 ms 20976 KB Output is correct
89 Correct 158 ms 21596 KB Output is correct
90 Correct 192 ms 22716 KB Output is correct
91 Correct 173 ms 22828 KB Output is correct
92 Correct 184 ms 23384 KB Output is correct
93 Correct 173 ms 24012 KB Output is correct
94 Correct 179 ms 22860 KB Output is correct
95 Correct 185 ms 23268 KB Output is correct
96 Correct 123 ms 20424 KB Output is correct
97 Correct 93 ms 14800 KB Output is correct
98 Correct 161 ms 22776 KB Output is correct
99 Correct 166 ms 21772 KB Output is correct
100 Correct 64 ms 8756 KB Output is correct
101 Correct 177 ms 23180 KB Output is correct
102 Correct 142 ms 20560 KB Output is correct
103 Correct 151 ms 20388 KB Output is correct
104 Correct 175 ms 22540 KB Output is correct