oj.uz

Submission #484704

# Submission time Handle Problem Language Result Execution time Memory
484704 2021-11-05T07:37:00 Z idas Pipes (BOI13_pipes) C++17
60.9259 / 100
 394 ms 71336 KB 
#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define FAST_IO ios_base::sync_with_stdio(false); cin.tie(nullptr)
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()
#define F first
#define S second
#define PB push_back
#define MP make_pair

using namespace std;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pff;
typedef map<int, int> mii;
typedef vector<int> vi;
typedef long double ld;
typedef long long ll;

const int INF=1e9, MOD=1e9+7;

void setIO()
{
    FAST_IO;
}

void setIO(string s)
{
    FAST_IO;
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

const int N=5e5+10;
int n, m;
ll c[N], non[N];
vi ad[N];
bool v[N], vc[N];
map<pii, ll> x;
map<int, pii> con;

queue<int> q;
void bfs()
{
    while(!q.empty()){
        int u=q.front(); q.pop();
        if(v[u]) continue;
        v[u]=true;
        int cn=0;
        for(auto it : ad[u]){
            if(!x.count({it, u})) cn++;
        }
        if(cn>=2){
            v[u]=false;
            continue;
        }
        int in=-1;
        ll sm=0;
        for(auto it : ad[u]){
            if(!x.count({it, u})) in=it;
            sm+=x[{it, u}];
        }
        q.push(in);
        x[{in, u}]=x[{u, in}]=2LL*c[u]-sm;
    }
}

int inn;
ll sm, all;
void dfs(int u)
{
    v[u]=true; vc[u]=true;
    if(inn&1){
        sm+=2*c[u]-non[u];
    }
    all+=2*c[u]-non[u];
    inn++;
    for(auto it : ad[u]){
        if(v[it]) continue;
        dfs(it);
    }
}

int in;

void getA()
{
    int l=-1;
    for(auto it : ad[in]){
        if(!v[it]){
            if(l==-1) l=it;
            else break;
        }
    }
    assert(l!=-1);
    dfs(l);
    x[{in, l}]=x[{l, in}]=all/2-sm;
}

void build(int u)
{
    vc[u]=false;
    ll have=0;
    for(auto it : ad[u]){
        if(x.count({u, it})) have+=x[{u, it}];
    }
    for(auto it : ad[u]){
        if(!x.count({u, it})){
            x[{u, it}]=x[{it, u}]=2LL*c[u]-have;
        }
    }
    for(auto it : ad[u]){
        if(!vc[it]) continue;
        build(it);
    }
}

void getNon()
{
    FOR(i, 0, n)
    {
        if(!v[i]){
            for(auto it : ad[i]){
                if(v[it]){
                    non[i]+=x[{i, it}];
                }
            }
        }
    }
}

int main()
{
    setIO();
    cin >> n >> m;
    FOR(i, 0, n) cin >> c[i];
    FOR(i, 0, m)
    {
        int a, b; cin >> a >> b; a--; b--;
        ad[a].PB(b);
        ad[b].PB(a);
        con[i]={a, b};
    }
    if(n<m){
        cout << 0;
        return 0;
    }

    vi lf;
    FOR(i, 0, n) if(ad[i].size()==1) lf.PB(i);

    for(auto u : lf){
        q.push(u);
    }

    bfs();
    getNon();

    FOR(i, 0, n)
    {
        if(!v[i]){
            in=i;
        }
    }

    if(in==-1){
        FOR(i, 0, m)
        {
            cout << x[con[i]] << '\n';
        }
        return 0;
    }

    getA();
    build(in);

    FOR(i, 0, m)
    {
        cout << x[con[i]] << '\n';
    }
}

Compilation message

pipes.cpp: In function 'void setIO(std::string)':
pipes.cpp:29:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pipes.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 30.0

# Verdict Execution time Memory Grader output
1 Runtime error 15 ms 24396 KB Execution killed with signal 6
2 Runtime error 16 ms 24296 KB Execution killed with signal 6
3 Runtime error 16 ms 24780 KB Execution killed with signal 6
4 Runtime error 343 ms 70980 KB Execution killed with signal 6
5 Runtime error 15 ms 24268 KB Execution killed with signal 6
6 Runtime error 16 ms 24344 KB Execution killed with signal 6
7 Runtime error 15 ms 24396 KB Execution killed with signal 6
8 Runtime error 15 ms 24396 KB Execution killed with signal 6
9 Runtime error 16 ms 24780 KB Execution killed with signal 6
10 Runtime error 16 ms 24692 KB Execution killed with signal 6
11 Runtime error 16 ms 24808 KB Execution killed with signal 6
12 Runtime error 16 ms 24760 KB Execution killed with signal 6
13 Runtime error 246 ms 61516 KB Execution killed with signal 6
14 Runtime error 337 ms 68532 KB Execution killed with signal 6
15 Runtime error 361 ms 71176 KB Execution killed with signal 6
16 Runtime error 282 ms 64072 KB Execution killed with signal 6
17 Runtime error 394 ms 70976 KB Execution killed with signal 6
18 Runtime error 367 ms 71336 KB Execution killed with signal 6
19 Runtime error 234 ms 70636 KB Execution killed with signal 6
20 Runtime error 15 ms 24396 KB Execution killed with signal 6
21 Runtime error 19 ms 24780 KB Execution killed with signal 6
22 Runtime error 347 ms 71120 KB Execution killed with signal 6
23 Runtime error 255 ms 61416 KB Execution killed with signal 6
24 Runtime error 334 ms 71232 KB Execution killed with signal 6
25 Runtime error 289 ms 63304 KB Execution killed with signal 6

Subtask #2
60.9259259259 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 12108 KB Output is correct
2 Correct 7 ms 12364 KB Output is correct
3 Incorrect 286 ms 41156 KB Output isn't correct
4 Correct 59 ms 22220 KB Output is correct
5 Correct 58 ms 21952 KB Output is correct
6 Correct 232 ms 53148 KB Output is correct
7 Correct 6 ms 12108 KB Output is correct
8 Correct 6 ms 11980 KB Output is correct
9 Incorrect 6 ms 12108 KB Output isn't correct
10 Correct 7 ms 12044 KB Output is correct
11 Correct 6 ms 11980 KB Output is correct
12 Correct 6 ms 11980 KB Output is correct
13 Correct 6 ms 12016 KB Output is correct
14 Correct 6 ms 12108 KB Output is correct
15 Correct 7 ms 12440 KB Output is correct
16 Correct 7 ms 12236 KB Output is correct
17 Incorrect 7 ms 12364 KB Output isn't correct
18 Correct 6 ms 12108 KB Output is correct
19 Correct 6 ms 12080 KB Output is correct
20 Correct 6 ms 12108 KB Output is correct
21 Correct 7 ms 12236 KB Output is correct
22 Correct 8 ms 12272 KB Output is correct
23 Correct 218 ms 38468 KB Output is correct
24 Correct 293 ms 42864 KB Output is correct
25 Incorrect 281 ms 41216 KB Output isn't correct
26 Correct 58 ms 22212 KB Output is correct
27 Correct 60 ms 22104 KB Output is correct
28 Correct 62 ms 22752 KB Output is correct
29 Correct 199 ms 45224 KB Output is correct
30 Correct 257 ms 42052 KB Output is correct
31 Correct 263 ms 48068 KB Output is correct
32 Correct 345 ms 38860 KB Output is correct
33 Incorrect 290 ms 43228 KB Output isn't correct
34 Correct 64 ms 22212 KB Output is correct
35 Correct 64 ms 22208 KB Output is correct
36 Correct 62 ms 22340 KB Output is correct
37 Correct 228 ms 53224 KB Output is correct
38 Correct 265 ms 41924 KB Output is correct
39 Correct 353 ms 37764 KB Output is correct
40 Correct 297 ms 42304 KB Output is correct
41 Incorrect 275 ms 48048 KB Output isn't correct
42 Correct 58 ms 22220 KB Output is correct
43 Correct 60 ms 22136 KB Output is correct
44 Correct 58 ms 21932 KB Output is correct
45 Correct 194 ms 48020 KB Output is correct
46 Correct 257 ms 41412 KB Output is correct
47 Correct 286 ms 42568 KB Output is correct
48 Correct 276 ms 47684 KB Output is correct
49 Incorrect 332 ms 37020 KB Output isn't correct
50 Correct 58 ms 22212 KB Output is correct
51 Correct 59 ms 22228 KB Output is correct
52 Correct 60 ms 21980 KB Output is correct
53 Correct 197 ms 48888 KB Output is correct
54 Correct 271 ms 41032 KB Output is correct