oj.uz

Submission #541807

# Submission time Handle Problem Language Result Execution time Memory
541807 2022-03-24T12:48:09 Z mat_v Logičari (COCI21_logicari) C++14
110 / 110
 193 ms 21412 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>

#define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
#define fb(i,a,b) for(int (i) = (a); (i) >= (b); --(i))
#define mod 998244353
#define xx first
#define yy second
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define ll long long
#define pii pair<int,int>


using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;/// find_by_order(x)(x+1th) , order_of_key() (strictly less)
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());


int n;
int m;
pii edges[100005];
vector<int> graf[100005];


int dsu[100005];
int finddsu(int x){
    if(x == dsu[x])return x;
    return dsu[x] = finddsu(dsu[x]);
}

int dist[100005];

void dfsdist(int x, int duz){
    dist[x] = duz;
    for(auto c:graf[x]){
        if(dist[c])continue;
        dfsdist(c, duz + 1);
    }
}


ll ans = 1e9;

int z1,z2;

bool bio[100005][2][2];
ll dp[100005][2][2];

void dfs(int x, int y, int z, int cale){
    if(z && (x == z1 || x == z2)){
        bio[x][y][z] = 1;
        dp[x][y][z] = 1e9;
        return;
    }
    if(bio[x][y][z])return;
    bio[x][y][z] = 1;
    for(auto c:graf[x]){
        if(c == cale)continue;
        dfs(c,0,0,x);
        dfs(c,0,1,x);
        dfs(c,1,0,x);
        dfs(c,1,1,x);
    }
    if(y == 0 && z == 0){
        ll sum = 0;
        bool doso = 0;
        for(auto c:graf[x]){
            if(c == cale)continue;
            doso = 1;
            sum += dp[c][0][0];
        }
        if(!doso){
            dp[x][y][z] = 1e9;
            return;
        }
        dp[x][y][z] = 1e9;
        for(auto c:graf[x]){
            if(c == cale)continue;
            dp[x][y][z] = min(dp[x][y][z], sum - dp[c][0][0] + dp[c][0][1]);
        }

    }
    if(y == 0 && z == 1){
        ll sum = 0;
        bool doso = 0;
        for(auto c:graf[x]){
            if(c == cale)continue;
            doso = 1;
            sum += dp[c][1][0];
        }
        if(!doso){
            dp[x][y][z] = 1e9;
            return;
        }
        dp[x][y][z] = 1e9;
        for(auto c:graf[x]){
            if(c == cale)continue;
            dp[x][y][z] = min(dp[x][y][z], sum-dp[c][1][0]+dp[c][1][1]);
        }
        dp[x][y][z]++;
    }
    if(y == 1 && z == 0){
        dp[x][y][z] = 0;
        for(auto c:graf[x]){
            if(c == cale)continue;
            dp[x][y][z] += dp[c][0][0];
        }
        ll kurac =1e9;
        dp[x][y][z] = min(dp[x][y][z], kurac);
    }
    if(y == 1 && z == 1){
        dp[x][y][z] = 1;
        for(auto c:graf[x]){
            if(c == cale)continue;
            dp[x][y][z] += dp[c][1][0];
        }
        ll kurac =1e9;
        dp[x][y][z] = min(dp[x][y][z], kurac);
    }
}

void resi(int f1, int f2){
    z1 = f1;
    z2 = f2;
    ff(i,1,n)graf[i].clear();
    ff(i,1,n){
        if(edges[i].xx == f1 && edges[i].yy == f2)continue;
        if(edges[i].yy == f1 && edges[i].xx == f2)continue;
        graf[edges[i].xx].pb(edges[i].yy);
        graf[edges[i].yy].pb(edges[i].xx);
    }
    ff(i,1,n){
        ff(j,0,1){
            ff(k,0,1){
                bio[i][j][k] = dp[i][j][k] = 0;
            }
        }
    }
    dfs(1,0,1,0);
    dfs(1,0,0,0);
    ll sta = min(dp[1][0][1], dp[1][0][0]);
    if(sta < 1e9)ans = min(ans, sta);
}

int main()
{

    ios_base::sync_with_stdio(false); cin.tie(0);

    cin >> n;
    int idx = n;
    ff(i,1,n)dsu[i] = i;
    ff(i,1,n){
        int x,y;
        cin >> x >> y;
        int p1 = finddsu(x);
        int p2 = finddsu(y);
        if(p1 == p2){
            idx = i;
        }
        else{
            graf[x].pb(y);
            graf[y].pb(x);
            dsu[p1] = p2;
        }
        edges[i] = {x,y};
    }

    dfsdist(edges[idx].xx, 1);
    vector<int> braca;
    int tmp = edges[idx].yy;
    while(tmp != edges[idx].xx){
        braca.pb(tmp);
        for(auto c:graf[tmp]){
            if(dist[c] < dist[tmp]){
                tmp = c;
                break;
            }
        }
    }
    braca.pb(tmp);

    int m = braca.size();
    ff(j,0,3){
        resi(braca[j%m],braca[(j+1)%m]);
    }
    if(ans >= n+5)ans = -1;
    cout << ans << "\n";

    return 0;
}

Compilation message

Main.cpp: In function 'void resi(int, int)':
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:129:5: note: in expansion of macro 'ff'
  129 |     ff(i,1,n)graf[i].clear();
      |     ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:130:5: note: in expansion of macro 'ff'
  130 |     ff(i,1,n){
      |     ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:136:5: note: in expansion of macro 'ff'
  136 |     ff(i,1,n){
      |     ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:137:9: note: in expansion of macro 'ff'
  137 |         ff(j,0,1){
      |         ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:138:13: note: in expansion of macro 'ff'
  138 |             ff(k,0,1){
      |             ^~
Main.cpp:139:44: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  139 |                 bio[i][j][k] = dp[i][j][k] = 0;
      |                                ~~~~~~~~~~~~^~~
Main.cpp: In function 'int main()':
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:156:5: note: in expansion of macro 'ff'
  156 |     ff(i,1,n)dsu[i] = i;
      |     ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:157:5: note: in expansion of macro 'ff'
  157 |     ff(i,1,n){
      |     ^~
Main.cpp:6:27: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    6 | #define ff(i,a,b) for(int (i) = (a); (i) <= (b); ++(i))
      |                           ^
Main.cpp:188:5: note: in expansion of macro 'ff'
  188 |     ff(j,0,3){
      |     ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 186 ms 21412 KB Output is correct
6 Correct 189 ms 21152 KB Output is correct
7 Correct 193 ms 18696 KB Output is correct
8 Correct 181 ms 19212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 2 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 3 ms 2696 KB Output is correct
15 Correct 2 ms 2692 KB Output is correct
16 Correct 2 ms 2688 KB Output is correct
17 Correct 2 ms 2688 KB Output is correct
18 Correct 3 ms 2688 KB Output is correct
19 Correct 3 ms 2644 KB Output is correct
20 Correct 3 ms 2772 KB Output is correct
21 Correct 2 ms 2692 KB Output is correct
22 Correct 2 ms 2772 KB Output is correct
23 Correct 2 ms 2772 KB Output is correct
24 Correct 2 ms 2772 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 186 ms 21412 KB Output is correct
6 Correct 189 ms 21152 KB Output is correct
7 Correct 193 ms 18696 KB Output is correct
8 Correct 181 ms 19212 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 1 ms 2644 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 2 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 2 ms 2644 KB Output is correct
20 Correct 2 ms 2644 KB Output is correct
21 Correct 2 ms 2772 KB Output is correct
22 Correct 3 ms 2696 KB Output is correct
23 Correct 2 ms 2692 KB Output is correct
24 Correct 2 ms 2688 KB Output is correct
25 Correct 2 ms 2688 KB Output is correct
26 Correct 3 ms 2688 KB Output is correct
27 Correct 3 ms 2644 KB Output is correct
28 Correct 3 ms 2772 KB Output is correct
29 Correct 2 ms 2692 KB Output is correct
30 Correct 2 ms 2772 KB Output is correct
31 Correct 2 ms 2772 KB Output is correct
32 Correct 2 ms 2772 KB Output is correct
33 Correct 131 ms 11132 KB Output is correct
34 Correct 120 ms 11012 KB Output is correct
35 Correct 151 ms 11020 KB Output is correct
36 Correct 109 ms 11092 KB Output is correct
37 Correct 22 ms 4812 KB Output is correct
38 Correct 123 ms 11152 KB Output is correct
39 Correct 8 ms 3412 KB Output is correct
40 Correct 115 ms 10972 KB Output is correct
41 Correct 87 ms 12528 KB Output is correct
42 Correct 107 ms 12356 KB Output is correct
43 Correct 186 ms 19384 KB Output is correct
44 Correct 135 ms 17592 KB Output is correct