oj.uz

Submission #107055

# Submission time Handle Problem Language Result Execution time Memory
107055 2019-04-21T15:44:29 Z Pajaraja Pipes (BOI13_pipes) C++17
74.0741 / 100
 400 ms 22648 KB 
#include <bits/stdc++.h>
#define MAXN 100007
#define MAXM 500007
using namespace std;
map<pair<int,int>,long long> mp;
vector<int> g[MAXN],c;
int gr[MAXM][2],n,m,deg[MAXN],parc[MAXN];
long long t[MAXN];
bool vi[MAXN];
void dfs(int s)
{
	c.push_back(s);
	for(int i=0;i<g[s].size();i++) if(!vi[g[s][i]]) dfs(g[s][i]);
}
int main()
{
	int n,m;
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++) scanf("%lld",&t[i]);
	for(int i=0;i<m;i++) 
	{
		scanf("%d%d",&gr[i][0],&gr[i][1]);
		g[gr[i][0]].push_back(gr[i][1]);
		g[gr[i][1]].push_back(gr[i][0]);
	}
	queue<int> q;
	for(int i=1;i<=n;i++) deg[i]=g[i].size();
	for(int i=1;i<=n;i++) if(deg[i]==1) q.push(i);
	while(!q.empty())
	{
		int u=q.front(); q.pop();
		vi[u]=true;
		for(int i=0;i<g[u].size();i++) if(!vi[g[u][i]]) 
		{	
			deg[g[u][i]]--;
			t[g[u][i]]-=t[u];
			mp[make_pair(u,g[u][i])]=mp[make_pair(g[u][i],u)]=2*t[u];
			if(deg[g[u][i]]==1) q.push(g[u][i]);
		}
	}
	for(int i=1;i<=n;i++) if(deg[i]>1) {printf("0"); return 0;}
	for(int i=1;i<=n;i++) if(!vi[i])
	{
		c.clear();
		dfs(i);
		if(c.size()%2==0) {printf("0"); return 0;}
		long long tz=0;
		for(int i=0;i<c.size();i++) tz+=t[i];
		tz/=2;
		for(int i=2;i<c.size();i+=2) parc[i]=parc[i-2]+t[c[i-2]];
		parc[1]=parc[c.size()-1]+t[c[c.size()-1]]-tz;
		for(int i=3;i<c.size();i+=2) parc[i]=parc[i-2]+t[c[i-2]];
		for(int i=0;i<c.size()-1;i++) mp[make_pair(c[i],c[i+1])]=mp[make_pair(c[i+1],c[i])]=2*(parc[i+1]-parc[i]);
		mp[make_pair(c[0],c[c.size()-1])]=mp[make_pair(c[c.size()-1],c[0])]=2*(tz-parc[c.size()-1]);
	}
	for(int i=0;i<m;i++) printf("%lld\n",mp[make_pair(gr[i][0],gr[i][1])]);
}

Compilation message

pipes.cpp: In function 'void dfs(int)':
pipes.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<g[s].size();i++) if(!vi[g[s][i]]) dfs(g[s][i]);
              ~^~~~~~~~~~~~
pipes.cpp: In function 'int main()':
pipes.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<g[u].size();i++) if(!vi[g[u][i]]) 
               ~^~~~~~~~~~~~
pipes.cpp:48:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<c.size();i++) tz+=t[i];
               ~^~~~~~~~~
pipes.cpp:50:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=2;i<c.size();i+=2) parc[i]=parc[i-2]+t[c[i-2]];
               ~^~~~~~~~~
pipes.cpp:52:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=3;i<c.size();i+=2) parc[i]=parc[i-2]+t[c[i-2]];
               ~^~~~~~~~~
pipes.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<c.size()-1;i++) mp[make_pair(c[i],c[i+1])]=mp[make_pair(c[i+1],c[i])]=2*(parc[i+1]-parc[i]);
               ~^~~~~~~~~~~
pipes.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~
pipes.cpp:19:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%lld",&t[i]);
                        ~~~~~^~~~~~~~~~~~~~
pipes.cpp:22:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&gr[i][0],&gr[i][1]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 2688 KB Output is correct
2 Correct 4 ms 2688 KB Output is correct
3 Correct 6 ms 2944 KB Output is correct
4 Correct 320 ms 22520 KB Output is correct
5 Correct 4 ms 2688 KB Output is correct
6 Correct 4 ms 2688 KB Output is correct
7 Correct 5 ms 2688 KB Output is correct
8 Correct 4 ms 2688 KB Output is correct
9 Correct 6 ms 2944 KB Output is correct
10 Correct 6 ms 2944 KB Output is correct
11 Correct 6 ms 2944 KB Output is correct
12 Correct 6 ms 2944 KB Output is correct
13 Correct 254 ms 18424 KB Output is correct
14 Correct 299 ms 21548 KB Output is correct
15 Correct 305 ms 22648 KB Output is correct
16 Correct 259 ms 19580 KB Output is correct
17 Correct 303 ms 22552 KB Output is correct
18 Correct 320 ms 22648 KB Output is correct
19 Correct 290 ms 22520 KB Output is correct
20 Correct 4 ms 2688 KB Output is correct
21 Correct 5 ms 2944 KB Output is correct
22 Correct 322 ms 22608 KB Output is correct
23 Correct 211 ms 18496 KB Output is correct
24 Correct 400 ms 22648 KB Output is correct
25 Correct 259 ms 19396 KB Output is correct

Subtask #2
44.0740740741 / 70.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 2688 KB Output isn't correct
2 Incorrect 6 ms 2816 KB Output isn't correct
3 Correct 157 ms 15344 KB Output is correct
4 Correct 111 ms 12272 KB Output is correct
5 Correct 189 ms 18296 KB Output is correct
6 Correct 268 ms 22068 KB Output is correct
7 Incorrect 5 ms 2688 KB Output isn't correct
8 Incorrect 4 ms 2688 KB Output isn't correct
9 Correct 5 ms 2688 KB Output is correct
10 Correct 5 ms 2688 KB Output is correct
11 Correct 4 ms 2688 KB Output is correct
12 Correct 4 ms 2688 KB Output is correct
13 Correct 5 ms 2688 KB Output is correct
14 Incorrect 5 ms 2688 KB Output isn't correct
15 Incorrect 6 ms 2808 KB Output isn't correct
16 Incorrect 5 ms 2816 KB Output isn't correct
17 Correct 5 ms 2816 KB Output is correct
18 Correct 6 ms 2816 KB Output is correct
19 Correct 7 ms 2816 KB Output is correct
20 Correct 5 ms 2688 KB Output is correct
21 Correct 5 ms 2816 KB Output is correct
22 Incorrect 6 ms 2816 KB Output isn't correct
23 Incorrect 105 ms 11872 KB Output isn't correct
24 Incorrect 171 ms 15532 KB Output isn't correct
25 Correct 170 ms 15428 KB Output is correct
26 Correct 111 ms 13176 KB Output is correct
27 Correct 88 ms 10532 KB Output is correct
28 Correct 186 ms 16504 KB Output is correct
29 Correct 256 ms 18816 KB Output is correct
30 Incorrect 183 ms 16172 KB Output isn't correct
31 Incorrect 83 ms 11216 KB Output isn't correct
32 Incorrect 286 ms 20056 KB Output isn't correct
33 Correct 156 ms 15320 KB Output is correct
34 Correct 102 ms 12024 KB Output is correct
35 Correct 119 ms 12280 KB Output is correct
36 Correct 213 ms 17192 KB Output is correct
37 Correct 330 ms 21976 KB Output is correct
38 Incorrect 160 ms 16248 KB Output isn't correct
39 Incorrect 285 ms 20708 KB Output isn't correct
40 Incorrect 193 ms 16248 KB Output isn't correct
41 Correct 93 ms 11128 KB Output is correct
42 Correct 79 ms 9820 KB Output is correct
43 Correct 69 ms 9848 KB Output is correct
44 Correct 229 ms 18192 KB Output is correct
45 Correct 273 ms 18808 KB Output is correct
46 Incorrect 195 ms 16888 KB Output isn't correct
47 Incorrect 168 ms 15940 KB Output isn't correct
48 Incorrect 106 ms 11512 KB Output isn't correct
49 Correct 214 ms 19164 KB Output is correct
50 Correct 155 ms 14072 KB Output is correct
51 Correct 153 ms 16112 KB Output is correct
52 Correct 95 ms 12100 KB Output is correct
53 Correct 273 ms 19296 KB Output is correct
54 Incorrect 189 ms 17208 KB Output isn't correct