oj.uz

Submission #768220

# Submission time Handle Problem Language Result Execution time Memory
768220 2023-06-27T17:21:13 Z Augustyn Logičari (COCI21_logicari) C++17
110 / 110
 40 ms 15680 KB 
#include<iostream>
#include<vector>
using namespace std;
#define inf 100001
struct dodp
{
    int nieb_widz,nieb_nwidz,
        bial_widz,bial_nwidz;
    dodp(int a, int b, int c, int d)
    {
        nieb_widz=a;
        nieb_nwidz=b;
        bial_widz=c;
        bial_nwidz=d;   
    }
    dodp()
    { 
    }
};
 
vector<vector<int>>pol;
vector<bool>bylem;
vector<bool>okr;
vector<dodp>dp;
vector<int>pkty_nokr;
int szuk_okr(int ter,int popr)
{
    bylem[ter]=1;
    for(auto i:pol[ter])
    {
        if(i==popr)
            continue;
        if(bylem[i])
        {
            pkty_nokr.push_back(ter);
            okr[ter]=1;
            return i;
        }
        int dtg=szuk_okr(i,ter);
        if(dtg==-1)
            return -1;
        else if(dtg)
        {
            okr[ter]=1;
            pkty_nokr.push_back(ter);
            if(ter==dtg)
                return -1;
            else
                return dtg;
        }
    }
    return 0;
}
void licz_dp(int ter,int popr)
{
    dodp sum(inf,inf,0,0);
    for(auto i:pol[ter])
    {
        if(i==popr||okr[i])
            continue;
        licz_dp(i,ter);
        sum.bial_nwidz+=dp[i].bial_nwidz;
        sum.bial_widz+=dp[i].bial_widz;
        //if(dp[i].nieb_widz<inf)
            sum.nieb_widz=min(sum.nieb_nwidz,dp[i].nieb_widz-dp[i].bial_widz);
       // if(dp[i].nieb_nwidz<inf)
            sum.nieb_nwidz=min(sum.nieb_nwidz,dp[i].nieb_nwidz-dp[i].bial_nwidz);
 
    }
    dp[ter].bial_nwidz=sum.bial_widz;
    dp[ter].nieb_nwidz=sum.bial_nwidz+1;
    dp[ter].bial_widz=sum.bial_widz+sum.nieb_widz;
    dp[ter].nieb_widz=sum.bial_nwidz+sum.nieb_nwidz+1;
}
void liczod(int zacz_odteg,vector<dodp>&dp2)
{
    for(int i=zacz_odteg;i<pkty_nokr.size();++i)
    {
        dp2[i].bial_nwidz=dp2[i-1].bial_widz+dp[pkty_nokr[i]].bial_nwidz;
        dp2[i].nieb_nwidz=dp2[i-1].bial_nwidz+dp[pkty_nokr[i]].nieb_nwidz;
        dp2[i].bial_widz=min(dp2[i-1].bial_widz+dp[pkty_nokr[i]].bial_widz,
                                dp2[i-1].nieb_widz+dp[pkty_nokr[i]].bial_nwidz);
        dp2[i].nieb_widz=min(dp2[i-1].bial_nwidz+dp[pkty_nokr[i]].nieb_widz,
                                dp2[i-1].nieb_nwidz+dp[pkty_nokr[i]].nieb_nwidz);
    }
}
int main()
{
    int n;
    scanf("%d",&n);
    pol.resize(n+1);
    bylem.resize(n+1,0);
    okr.resize(n+1,0);
    dp.resize(n+1);
    for(int i=0;i<n;++i)
    {
        int a,b;
        scanf("%d%d",&a,&b);
        pol[a].push_back(b);
        pol[b].push_back(a);
    }
    szuk_okr(1,0);
    for(int i=1;i<=n;++i)
    {
        dp[i].nieb_widz=dp[i].bial_widz=
        dp[i].nieb_nwidz=dp[i].bial_nwidz=inf;
        if(okr[i])
        {
            if(pol[i].size()==2)
            {
                dp[i].bial_nwidz=0;
                dp[i].nieb_nwidz=1;
            }
        }
        else
        {
            if(pol[i].size()==1)
            {
                dp[i].bial_nwidz=0;
                dp[i].nieb_nwidz=1;
            }
        }
    }
    for(auto i:pkty_nokr)
        licz_dp(i,0);
    vector<dodp>dp2(pkty_nokr.size());
    dodp pom(inf,inf,inf,inf);
    int odp=inf;
    dp2[0]=pom;
    dp2[0].bial_widz=dp[pkty_nokr[0]].bial_widz;
    liczod(1,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].bial_widz);
 
    dp2[0]=pom;
    dp2[0].nieb_widz=dp[pkty_nokr[0]].nieb_widz;
    liczod(1,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].bial_nwidz);
 
    dp2[0]=pom;
    dp2[1]=pom;
    dp2[0].bial_nwidz=dp[pkty_nokr[0]].bial_nwidz;
    dp2[1].bial_nwidz=dp2[0].bial_nwidz+dp[pkty_nokr[1]].bial_nwidz;
    dp2[1].bial_widz=dp2[0].bial_nwidz+dp[pkty_nokr[1]].bial_widz;
    liczod(2,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].nieb_widz);
    
    dp2[0]=pom;
    dp2[1]=pom;
    dp2[0].bial_nwidz=dp[pkty_nokr[0]].bial_nwidz;
    dp2[1].nieb_nwidz=dp2[0].bial_nwidz+dp[pkty_nokr[1]].nieb_nwidz;
    dp2[1].nieb_widz=dp2[0].bial_nwidz+dp[pkty_nokr[1]].nieb_widz;
    liczod(2,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].bial_widz);
 
    dp2[0]=pom;
    dp2[1]=pom;
    dp2[0].nieb_nwidz=dp[pkty_nokr[0]].nieb_nwidz;
    dp2[1].bial_widz=dp2[0].nieb_nwidz+dp[pkty_nokr[1]].bial_nwidz;
    liczod(2,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].nieb_nwidz);
 
    dp2[0]=pom;
    dp2[1]=pom;
    dp2[0].nieb_nwidz=dp[pkty_nokr[0]].nieb_nwidz;
    dp2[1].nieb_widz=dp2[0].nieb_nwidz+dp[pkty_nokr[1]].nieb_nwidz;
    liczod(2,dp2);
    odp=min(odp,dp2[pkty_nokr.size()-1].bial_nwidz);
    if(odp==inf)
        printf("-1");
    else
        printf("%d",odp);
    return 0;
}

Compilation message

Main.cpp: In function 'void liczod(int, std::vector<dodp>&)':
Main.cpp:77:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     for(int i=zacz_odteg;i<pkty_nokr.size();++i)
      |                          ~^~~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:90:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
Main.cpp:98:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |         scanf("%d%d",&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 38 ms 15680 KB Output is correct
6 Correct 38 ms 15656 KB Output is correct
7 Correct 40 ms 15652 KB Output is correct
8 Correct 37 ms 15628 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 328 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 328 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #4
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 38 ms 15680 KB Output is correct
6 Correct 38 ms 15656 KB Output is correct
7 Correct 40 ms 15652 KB Output is correct
8 Correct 37 ms 15628 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 328 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 29 ms 6680 KB Output is correct
34 Correct 27 ms 6680 KB Output is correct
35 Correct 35 ms 6720 KB Output is correct
36 Correct 29 ms 6656 KB Output is correct
37 Correct 7 ms 1876 KB Output is correct
38 Correct 28 ms 6616 KB Output is correct
39 Correct 2 ms 852 KB Output is correct
40 Correct 31 ms 6612 KB Output is correct
41 Correct 23 ms 7640 KB Output is correct
42 Correct 25 ms 7652 KB Output is correct
43 Correct 39 ms 15164 KB Output is correct
44 Correct 32 ms 11376 KB Output is correct