| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 283173 |
2020-08-25T10:52:34 Z |
egekabas |
Pipes (BOI13_pipes) |
C++14 |
|
105 ms |
17144 KB |
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
ll n, m;
ll vert[100009];
ll deg[100009];
vector<pll> g[100009];
ll vis[100009];
ll ans[500009];
pll val[500009];
void dfs1(ll v){
vis[v] = 1;
for(auto u : g[v]){
if(vis[u.ff])
continue;
ans[u.ss] = vert[v];
vert[v] -= ans[u.ss];
vert[u.ff] -= ans[u.ss];
deg[v]--;
deg[u.ff]--;
if(deg[u.ff] <= 1)
dfs1(u.ff);
}
}
void dfs2(ll v, pll curval){
vis[v] = 1;
for(auto u : g[v]){
if(val[u.ss].ff == 0)
val[u.ss] = curval;
if(vis[u.ff])
continue;
dfs2(u.ff, {-curval.ff, vert[u.ff]-curval.ss});
}
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
//freopen("in.txt", "r", stdin);
//freopen("out.txt", "w", stdout);
cin >> n >> m;
if(m > n){
cout << "0\n";
return 0;
}
for(ll i = 1; i <= n; ++i)
cin >> vert[i];
for(ll i = 0; i < m; ++i){
ll x, y;
cin >> x >> y;
deg[x]++;
deg[y]++;
g[x].pb({y, i});
g[y].pb({x, i});
}
for(ll i = 1; i <= n; ++i)
if(vis[i] == 0 && deg[i] == 1)
dfs1(i);
ll var;
for(ll i = 1; i <= n; ++i)
if(vis[i] == 0){
vector<ll> ed;
for(auto u : g[i])
if(vis[u.ff] == 0)
ed.pb(u.ss);
dfs2(i, {1, 0});
pll curval = {val[ed[0]].ff+val[ed[1]].ff, val[ed[0]].ss+val[ed[1]].ss};
if(curval.ff == 0){
cout << "0\n";
return 0;
}
var = (vert[i]-curval.ss)/curval.ff;
}
for(int i = 0; i < m; ++i){
if(val[i].ff != 0)
ans[i] = var*val[i].ff+val[i].ss;
cout << 2*ans[i] << '\n';
}
}
Compilation message
pipes.cpp: In function 'int main()':
pipes.cpp:88:25: warning: 'var' may be used uninitialized in this function [-Wmaybe-uninitialized]
88 | ans[i] = var*val[i].ff+val[i].ss;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2816 KB |
Output is correct |
| 4 |
Correct |
84 ms |
11384 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 9 |
Correct |
3 ms |
2816 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2816 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2816 KB |
Output is correct |
| 12 |
Correct |
3 ms |
2816 KB |
Output is correct |
| 13 |
Correct |
66 ms |
9684 KB |
Output is correct |
| 14 |
Correct |
83 ms |
10948 KB |
Output is correct |
| 15 |
Correct |
98 ms |
11512 KB |
Output is correct |
| 16 |
Correct |
74 ms |
10104 KB |
Output is correct |
| 17 |
Correct |
90 ms |
11384 KB |
Output is correct |
| 18 |
Correct |
93 ms |
11384 KB |
Output is correct |
| 19 |
Correct |
97 ms |
12408 KB |
Output is correct |
| 20 |
Correct |
3 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2816 KB |
Output is correct |
| 22 |
Correct |
85 ms |
11384 KB |
Output is correct |
| 23 |
Correct |
64 ms |
9592 KB |
Output is correct |
| 24 |
Correct |
88 ms |
11384 KB |
Output is correct |
| 25 |
Correct |
68 ms |
10032 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
2 ms |
2688 KB |
Output isn't correct |
| 2 |
Incorrect |
2 ms |
2816 KB |
Output isn't correct |
| 3 |
Correct |
77 ms |
14072 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 6 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 7 |
Incorrect |
3 ms |
2688 KB |
Output isn't correct |
| 8 |
Incorrect |
2 ms |
2688 KB |
Output isn't correct |
| 9 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 11 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 12 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 13 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 14 |
Incorrect |
2 ms |
2688 KB |
Output isn't correct |
| 15 |
Incorrect |
3 ms |
2816 KB |
Output isn't correct |
| 16 |
Incorrect |
2 ms |
2816 KB |
Output isn't correct |
| 17 |
Correct |
3 ms |
2816 KB |
Output is correct |
| 18 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 19 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 20 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 21 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 22 |
Incorrect |
2 ms |
2816 KB |
Output isn't correct |
| 23 |
Incorrect |
70 ms |
13560 KB |
Output isn't correct |
| 24 |
Incorrect |
105 ms |
15608 KB |
Output isn't correct |
| 25 |
Correct |
74 ms |
14072 KB |
Output is correct |
| 26 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 28 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2688 KB |
Output is correct |
| 30 |
Incorrect |
87 ms |
14840 KB |
Output isn't correct |
| 31 |
Incorrect |
92 ms |
17144 KB |
Output isn't correct |
| 32 |
Incorrect |
88 ms |
13688 KB |
Output isn't correct |
| 33 |
Correct |
85 ms |
15224 KB |
Output is correct |
| 34 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 37 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 38 |
Incorrect |
96 ms |
15352 KB |
Output isn't correct |
| 39 |
Incorrect |
85 ms |
13368 KB |
Output isn't correct |
| 40 |
Incorrect |
88 ms |
15352 KB |
Output isn't correct |
| 41 |
Correct |
80 ms |
16632 KB |
Output is correct |
| 42 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 43 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 44 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 45 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 46 |
Incorrect |
93 ms |
14840 KB |
Output isn't correct |
| 47 |
Incorrect |
90 ms |
15480 KB |
Output isn't correct |
| 48 |
Incorrect |
94 ms |
17144 KB |
Output isn't correct |
| 49 |
Correct |
71 ms |
12536 KB |
Output is correct |
| 50 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 51 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 52 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 53 |
Correct |
2 ms |
2688 KB |
Output is correct |
| 54 |
Incorrect |
88 ms |
14584 KB |
Output isn't correct |
