oj.uz

Submission #131542

# Submission time Handle Problem Language Result Execution time Memory
131542 2019-07-17T09:13:26 Z dndhk None (KOI17_cat) C++14
100 / 100
 460 ms 40056 KB 
#include <bits/stdc++.h>

#define pb push_back
#define all(v) ((v).begin(), (v).end())
#define sortv(v) sort(all(v))
#define sz(v) ((int)(v).size())
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define umax(a, b) (a)=max((a), (b))
#define umin(a, b) (a)=min((a), (b))
#define FOR(i,a,b) for(int i = (a); i <= (b); i++)
#define rep(i,n) FOR(i,1,n)
#define rep0(i,n) FOR(i,0,(int)(n)-1)
#define FI first
#define SE second
#define INF 2000000000
#define INFLL 1000000000000000000LL


using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAX_N = 300000;

int N, M;
vector<int> gp[MAX_N+1];
int lv[MAX_N+1], p[MAX_N+1], C[MAX_N+1], up[MAX_N+1];
bool vst[MAX_N+1];
bool chk[MAX_N+1];
ll ans;

void dfs(int x){
    vst[x] = chk[x] = true;
    for(int i=0; i<gp[x].size(); i++){
        if(gp[x][i]==p[x])  continue;
        if(vst[gp[x][i]]){
            if(lv[x]>lv[gp[x][i]]){C[x]++; up[gp[x][i]]++;}
            continue;
        }
        lv[gp[x][i]] = lv[x]+1;  p[gp[x][i]] = x;  
        dfs(gp[x][i]);  C[x] += C[gp[x][i]]; 
        if(C[gp[x][i]] - up[x] > 1) chk[x] = false;
        if(up[x]>0)    chk[p[x]] = false;
        up[p[x]]+=up[x]; up[x] = 0;
    }
    if(chk[x] && C[x]==M)    ans+=(ll)x;
}


int main(){
    scanf("%d%d", &N, &M);
    for(int i=0; i<M; i++){
        int a, b; scanf("%d%d", &a, &b);
        gp[a].pb(b); gp[b].pb(a);
    }
    M -= (N-1);
    lv[1] = 1; dfs(1);
    cout<<ans;
    return 0;
}

Compilation message

cat.cpp: In function 'void dfs(int)':
cat.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<gp[x].size(); i++){
                  ~^~~~~~~~~~~~~
cat.cpp: In function 'int main()':
cat.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~
cat.cpp:54:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int a, b; scanf("%d%d", &a, &b);
                   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 7416 KB Output is correct
2 Correct 8 ms 7416 KB Output is correct
3 Correct 8 ms 7416 KB Output is correct
4 Correct 8 ms 7416 KB Output is correct
5 Correct 10 ms 7800 KB Output is correct
6 Correct 10 ms 7672 KB Output is correct
7 Correct 11 ms 7800 KB Output is correct
8 Correct 10 ms 7800 KB Output is correct
9 Correct 11 ms 7928 KB Output is correct
10 Correct 10 ms 7800 KB Output is correct
11 Correct 10 ms 7928 KB Output is correct
12 Correct 11 ms 7900 KB Output is correct
13 Correct 10 ms 7800 KB Output is correct
14 Correct 13 ms 7800 KB Output is correct
15 Correct 8 ms 7416 KB Output is correct
16 Correct 8 ms 7416 KB Output is correct
17 Correct 8 ms 7416 KB Output is correct
18 Correct 8 ms 7416 KB Output is correct
19 Correct 8 ms 7544 KB Output is correct
20 Correct 11 ms 7800 KB Output is correct
21 Correct 11 ms 7860 KB Output is correct
22 Correct 11 ms 7928 KB Output is correct
23 Correct 10 ms 7672 KB Output is correct
24 Correct 10 ms 7676 KB Output is correct
25 Correct 8 ms 7416 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 272 ms 26284 KB Output is correct
2 Correct 282 ms 26296 KB Output is correct
3 Correct 303 ms 26404 KB Output is correct
4 Correct 289 ms 26232 KB Output is correct
5 Correct 293 ms 26232 KB Output is correct
6 Correct 293 ms 26232 KB Output is correct
7 Correct 290 ms 26488 KB Output is correct
8 Correct 307 ms 26368 KB Output is correct
9 Correct 268 ms 26360 KB Output is correct
10 Correct 287 ms 26232 KB Output is correct
11 Correct 292 ms 26616 KB Output is correct
12 Correct 316 ms 26884 KB Output is correct
13 Correct 277 ms 26616 KB Output is correct
14 Correct 278 ms 26712 KB Output is correct
15 Correct 282 ms 26760 KB Output is correct
16 Correct 283 ms 29148 KB Output is correct
17 Correct 285 ms 29944 KB Output is correct
18 Correct 314 ms 28536 KB Output is correct
19 Correct 300 ms 29456 KB Output is correct
20 Correct 279 ms 28592 KB Output is correct
21 Correct 281 ms 27896 KB Output is correct
22 Correct 291 ms 33016 KB Output is correct
23 Correct 284 ms 34684 KB Output is correct
24 Correct 277 ms 27896 KB Output is correct
25 Correct 259 ms 33912 KB Output is correct
26 Correct 139 ms 40056 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 142 ms 40056 KB Output is correct
2 Correct 141 ms 40008 KB Output is correct
3 Correct 147 ms 40056 KB Output is correct
4 Correct 139 ms 40044 KB Output is correct
5 Correct 139 ms 39972 KB Output is correct
6 Correct 143 ms 40024 KB Output is correct
7 Correct 139 ms 39976 KB Output is correct
8 Correct 141 ms 40056 KB Output is correct
9 Correct 140 ms 40056 KB Output is correct
10 Correct 157 ms 35484 KB Output is correct
11 Correct 172 ms 35496 KB Output is correct
12 Correct 182 ms 35584 KB Output is correct
13 Correct 160 ms 35572 KB Output is correct
14 Correct 157 ms 35548 KB Output is correct
15 Correct 162 ms 30832 KB Output is correct
16 Correct 161 ms 30828 KB Output is correct
17 Correct 169 ms 30960 KB Output is correct
18 Correct 167 ms 30808 KB Output is correct
19 Correct 168 ms 30828 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 7416 KB Output is correct
2 Correct 8 ms 7416 KB Output is correct
3 Correct 8 ms 7416 KB Output is correct
4 Correct 8 ms 7416 KB Output is correct
5 Correct 10 ms 7800 KB Output is correct
6 Correct 10 ms 7672 KB Output is correct
7 Correct 11 ms 7800 KB Output is correct
8 Correct 10 ms 7800 KB Output is correct
9 Correct 11 ms 7928 KB Output is correct
10 Correct 10 ms 7800 KB Output is correct
11 Correct 10 ms 7928 KB Output is correct
12 Correct 11 ms 7900 KB Output is correct
13 Correct 10 ms 7800 KB Output is correct
14 Correct 13 ms 7800 KB Output is correct
15 Correct 8 ms 7416 KB Output is correct
16 Correct 8 ms 7416 KB Output is correct
17 Correct 8 ms 7416 KB Output is correct
18 Correct 8 ms 7416 KB Output is correct
19 Correct 8 ms 7544 KB Output is correct
20 Correct 11 ms 7800 KB Output is correct
21 Correct 11 ms 7860 KB Output is correct
22 Correct 11 ms 7928 KB Output is correct
23 Correct 10 ms 7672 KB Output is correct
24 Correct 10 ms 7676 KB Output is correct
25 Correct 8 ms 7416 KB Output is correct
26 Correct 272 ms 26284 KB Output is correct
27 Correct 282 ms 26296 KB Output is correct
28 Correct 303 ms 26404 KB Output is correct
29 Correct 289 ms 26232 KB Output is correct
30 Correct 293 ms 26232 KB Output is correct
31 Correct 293 ms 26232 KB Output is correct
32 Correct 290 ms 26488 KB Output is correct
33 Correct 307 ms 26368 KB Output is correct
34 Correct 268 ms 26360 KB Output is correct
35 Correct 287 ms 26232 KB Output is correct
36 Correct 292 ms 26616 KB Output is correct
37 Correct 316 ms 26884 KB Output is correct
38 Correct 277 ms 26616 KB Output is correct
39 Correct 278 ms 26712 KB Output is correct
40 Correct 282 ms 26760 KB Output is correct
41 Correct 283 ms 29148 KB Output is correct
42 Correct 285 ms 29944 KB Output is correct
43 Correct 314 ms 28536 KB Output is correct
44 Correct 300 ms 29456 KB Output is correct
45 Correct 279 ms 28592 KB Output is correct
46 Correct 281 ms 27896 KB Output is correct
47 Correct 291 ms 33016 KB Output is correct
48 Correct 284 ms 34684 KB Output is correct
49 Correct 277 ms 27896 KB Output is correct
50 Correct 259 ms 33912 KB Output is correct
51 Correct 139 ms 40056 KB Output is correct
52 Correct 142 ms 40056 KB Output is correct
53 Correct 141 ms 40008 KB Output is correct
54 Correct 147 ms 40056 KB Output is correct
55 Correct 139 ms 40044 KB Output is correct
56 Correct 139 ms 39972 KB Output is correct
57 Correct 143 ms 40024 KB Output is correct
58 Correct 139 ms 39976 KB Output is correct
59 Correct 141 ms 40056 KB Output is correct
60 Correct 140 ms 40056 KB Output is correct
61 Correct 157 ms 35484 KB Output is correct
62 Correct 172 ms 35496 KB Output is correct
63 Correct 182 ms 35584 KB Output is correct
64 Correct 160 ms 35572 KB Output is correct
65 Correct 157 ms 35548 KB Output is correct
66 Correct 162 ms 30832 KB Output is correct
67 Correct 161 ms 30828 KB Output is correct
68 Correct 169 ms 30960 KB Output is correct
69 Correct 167 ms 30808 KB Output is correct
70 Correct 168 ms 30828 KB Output is correct
71 Correct 342 ms 39004 KB Output is correct
72 Correct 343 ms 37908 KB Output is correct
73 Correct 359 ms 37484 KB Output is correct
74 Correct 429 ms 38860 KB Output is correct
75 Correct 382 ms 36856 KB Output is correct
76 Correct 339 ms 36472 KB Output is correct
77 Correct 378 ms 33584 KB Output is correct
78 Correct 332 ms 33388 KB Output is correct
79 Correct 336 ms 39032 KB Output is correct
80 Correct 339 ms 36396 KB Output is correct
81 Correct 340 ms 34420 KB Output is correct
82 Correct 342 ms 38876 KB Output is correct
83 Correct 460 ms 38904 KB Output is correct
84 Correct 350 ms 38036 KB Output is correct
85 Correct 345 ms 38520 KB Output is correct
86 Correct 220 ms 34212 KB Output is correct
87 Correct 215 ms 33776 KB Output is correct
88 Correct 177 ms 24584 KB Output is correct
89 Correct 198 ms 25060 KB Output is correct
90 Correct 209 ms 25012 KB Output is correct