oj.uz

Submission #107057

# Submission time Handle Problem Language Result Execution time Memory
107057 2019-04-21T15:48:54 Z Pajaraja Pipes (BOI13_pipes) C++17
65 / 100
 399 ms 132096 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]>2) {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 5 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 20988 KB Output is correct
5 Correct 5 ms 2688 KB Output is correct
6 Correct 5 ms 2688 KB Output is correct
7 Correct 4 ms 2688 KB Output is correct
8 Correct 5 ms 2688 KB Output is correct
9 Correct 8 ms 2944 KB Output is correct
10 Correct 6 ms 2816 KB Output is correct
11 Correct 7 ms 2816 KB Output is correct
12 Correct 5 ms 2944 KB Output is correct
13 Correct 277 ms 17272 KB Output is correct
14 Correct 326 ms 19960 KB Output is correct
15 Correct 357 ms 21240 KB Output is correct
16 Correct 292 ms 18168 KB Output is correct
17 Correct 399 ms 20856 KB Output is correct
18 Correct 303 ms 20984 KB Output is correct
19 Correct 285 ms 20856 KB Output is correct
20 Correct 5 ms 2688 KB Output is correct
21 Correct 6 ms 2944 KB Output is correct
22 Correct 351 ms 21036 KB Output is correct
23 Correct 270 ms 17244 KB Output is correct
24 Correct 361 ms 21240 KB Output is correct
25 Correct 226 ms 17976 KB Output is correct

Subtask #2
35.0 / 70.0

# Verdict Execution time Memory Grader output
1 Runtime error 147 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Runtime error 139 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
3 Runtime error 284 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
4 Correct 110 ms 10744 KB Output is correct
5 Correct 213 ms 16632 KB Output is correct
6 Correct 333 ms 15776 KB Output is correct
7 Runtime error 153 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
8 Runtime error 137 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
9 Runtime error 142 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
10 Correct 4 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 4 ms 2688 KB Output is correct
14 Runtime error 155 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
15 Runtime error 161 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
16 Runtime error 156 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
17 Runtime error 152 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
18 Correct 5 ms 2816 KB Output is correct
19 Correct 5 ms 2816 KB Output is correct
20 Correct 5 ms 2816 KB Output is correct
21 Correct 6 ms 2816 KB Output is correct
22 Runtime error 146 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
23 Runtime error 253 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
24 Runtime error 240 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
25 Runtime error 232 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
26 Correct 96 ms 11512 KB Output is correct
27 Correct 81 ms 8952 KB Output is correct
28 Correct 151 ms 14840 KB Output is correct
29 Correct 266 ms 13640 KB Output is correct
30 Runtime error 278 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
31 Runtime error 225 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
32 Runtime error 363 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
33 Runtime error 272 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
34 Correct 117 ms 10360 KB Output is correct
35 Correct 109 ms 10744 KB Output is correct
36 Correct 185 ms 15736 KB Output is correct
37 Correct 323 ms 15792 KB Output is correct
38 Runtime error 276 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
39 Runtime error 382 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
40 Runtime error 297 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
41 Runtime error 231 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
42 Correct 89 ms 8184 KB Output is correct
43 Correct 84 ms 8236 KB Output is correct
44 Correct 229 ms 16560 KB Output is correct
45 Correct 226 ms 13432 KB Output is correct
46 Runtime error 303 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
47 Runtime error 298 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
48 Runtime error 249 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
49 Runtime error 372 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)
50 Correct 141 ms 12408 KB Output is correct
51 Correct 207 ms 14460 KB Output is correct
52 Correct 105 ms 10460 KB Output is correct
53 Correct 228 ms 13824 KB Output is correct
54 Runtime error 284 ms 132096 KB Execution killed with signal 9 (could be triggered by violating memory limits)