oj.uz

Submission #50130

# Submission time Handle Problem Language Result Execution time Memory
50130 2018-06-07T16:56:32 Z top34051 Parachute rings (IOI12_rings) C++17
55 / 100
 4000 ms 94816 KB 
#include<bits/stdc++.h>
using namespace std;

const int maxn = 1e6 + 5;

int n;
vector<int> way[maxn];
vector<int> deg[10];
int cut[maxn];
int sz, cy, vis[maxn];
stack<int> st;
int ok[maxn];

void Init(int _n) {
    n = _n;
}

void cycle(int u, int last, int ban) {
    if(vis[u]) {
        while(!st.empty()) {
            int v = st.top(); st.pop();
            sz++;
            if(v==u) break;
        }
        cy++;
        return ;
    }
    vis[u] = 1; st.push(u);
    for(auto v : way[u]) {
        if(v!=ban && v!=last && vis[v]<2) {
            cycle(v,u,ban);
        }
    }
    vis[u] = 2;
    if(!st.empty()) st.pop();
}

int check(int u) {
    memset(cut,0,sizeof(cut));
    for(auto v : way[u]) cut[v]++;
    for(int i=1;i<=n;i++) if(i!=u && way[i].size()-cut[i]>2) return 0;
    sz = cy = 0; memset(vis,0,sizeof(vis));
    for(int i=1;i<=n;i++) if(i!=u && !vis[i]) cycle(i,0,u);
    return cy==0;
}

int CountCritical() {
    for(int i=0;i<=4;i++) deg[i].clear();
    for(int x=1;x<=n;x++) deg[min(4,(int)way[x].size())].push_back(x);
    if(deg[4].size()) {
        memset(ok,0,sizeof(ok));
        if(deg[4].size()<=1) {
            for(auto u : deg[4]) if(!ok[u] && check(u)) ok[u] = 1;
        }
        int res = 0;
        for(int x=1;x<=n;x++) res += ok[x];
        return res;
    }
    if(deg[3].size()) {
        memset(ok,0,sizeof(ok));
        int u = deg[3][0];
        if(!ok[u] && check(u)) ok[u] = 1;
        for(auto v : way[u]) if(!ok[v] && check(v)) ok[v] = 1;
        int res = 0;
        for(int x=1;x<=n;x++) res += ok[x];
        return res;
    }
    sz = cy = 0; memset(vis,0,sizeof(vis));
    for(int i=1;i<=n;i++) if(!vis[i]) cycle(i,0,0);
    if(cy==0) return n;
    else if(cy==1) return sz;
    else return 0;
}

void Link(int x, int y) {
    x++; y++;
    way[x].push_back(y); way[y].push_back(x);
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27768 KB Output is correct
2 Correct 32 ms 35916 KB Output is correct
3 Correct 35 ms 35916 KB Output is correct
4 Correct 26 ms 35916 KB Output is correct
5 Correct 27 ms 35916 KB Output is correct
6 Correct 28 ms 35916 KB Output is correct
7 Correct 29 ms 35916 KB Output is correct
8 Correct 27 ms 35916 KB Output is correct
9 Correct 34 ms 35984 KB Output is correct
10 Correct 34 ms 35988 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 506 ms 46600 KB Output is correct
2 Correct 961 ms 64444 KB Output is correct
3 Correct 926 ms 64444 KB Output is correct
4 Correct 1215 ms 64444 KB Output is correct
5 Correct 1273 ms 64616 KB Output is correct
6 Correct 1238 ms 94816 KB Output is correct
7 Correct 831 ms 94816 KB Output is correct
8 Correct 1407 ms 94816 KB Output is correct
9 Correct 1282 ms 94816 KB Output is correct
10 Correct 971 ms 94816 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27768 KB Output is correct
2 Correct 32 ms 35916 KB Output is correct
3 Correct 35 ms 35916 KB Output is correct
4 Correct 26 ms 35916 KB Output is correct
5 Correct 27 ms 35916 KB Output is correct
6 Correct 28 ms 35916 KB Output is correct
7 Correct 29 ms 35916 KB Output is correct
8 Correct 27 ms 35916 KB Output is correct
9 Correct 34 ms 35984 KB Output is correct
10 Correct 34 ms 35988 KB Output is correct
11 Correct 105 ms 94816 KB Output is correct
12 Correct 106 ms 94816 KB Output is correct
13 Correct 193 ms 94816 KB Output is correct
14 Correct 113 ms 94816 KB Output is correct
15 Correct 139 ms 94816 KB Output is correct
16 Correct 86 ms 94816 KB Output is correct
17 Correct 149 ms 94816 KB Output is correct
18 Correct 79 ms 94816 KB Output is correct
19 Correct 87 ms 94816 KB Output is correct
20 Correct 151 ms 94816 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27768 KB Output is correct
2 Correct 32 ms 35916 KB Output is correct
3 Correct 35 ms 35916 KB Output is correct
4 Correct 26 ms 35916 KB Output is correct
5 Correct 27 ms 35916 KB Output is correct
6 Correct 28 ms 35916 KB Output is correct
7 Correct 29 ms 35916 KB Output is correct
8 Correct 27 ms 35916 KB Output is correct
9 Correct 34 ms 35984 KB Output is correct
10 Correct 34 ms 35988 KB Output is correct
11 Correct 105 ms 94816 KB Output is correct
12 Correct 106 ms 94816 KB Output is correct
13 Correct 193 ms 94816 KB Output is correct
14 Correct 113 ms 94816 KB Output is correct
15 Correct 139 ms 94816 KB Output is correct
16 Correct 86 ms 94816 KB Output is correct
17 Correct 149 ms 94816 KB Output is correct
18 Correct 79 ms 94816 KB Output is correct
19 Correct 87 ms 94816 KB Output is correct
20 Correct 151 ms 94816 KB Output is correct
21 Execution timed out 4038 ms 94816 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27768 KB Output is correct
2 Correct 32 ms 35916 KB Output is correct
3 Correct 35 ms 35916 KB Output is correct
4 Correct 26 ms 35916 KB Output is correct
5 Correct 27 ms 35916 KB Output is correct
6 Correct 28 ms 35916 KB Output is correct
7 Correct 29 ms 35916 KB Output is correct
8 Correct 27 ms 35916 KB Output is correct
9 Correct 34 ms 35984 KB Output is correct
10 Correct 34 ms 35988 KB Output is correct
11 Correct 506 ms 46600 KB Output is correct
12 Correct 961 ms 64444 KB Output is correct
13 Correct 926 ms 64444 KB Output is correct
14 Correct 1215 ms 64444 KB Output is correct
15 Correct 1273 ms 64616 KB Output is correct
16 Correct 1238 ms 94816 KB Output is correct
17 Correct 831 ms 94816 KB Output is correct
18 Correct 1407 ms 94816 KB Output is correct
19 Correct 1282 ms 94816 KB Output is correct
20 Correct 971 ms 94816 KB Output is correct
21 Correct 105 ms 94816 KB Output is correct
22 Correct 106 ms 94816 KB Output is correct
23 Correct 193 ms 94816 KB Output is correct
24 Correct 113 ms 94816 KB Output is correct
25 Correct 139 ms 94816 KB Output is correct
26 Correct 86 ms 94816 KB Output is correct
27 Correct 149 ms 94816 KB Output is correct
28 Correct 79 ms 94816 KB Output is correct
29 Correct 87 ms 94816 KB Output is correct
30 Correct 151 ms 94816 KB Output is correct
31 Execution timed out 4038 ms 94816 KB Time limit exceeded
32 Halted 0 ms 0 KB -