Submission #84229

#	Time	Username	Problem	Language	Result	Execution time	Memory
84229		nikolapesic2802	Untitled (POI11_smi)	C++14	100 / 100	1701 ms	134180 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
const int N=1e5+5;
vector<int> degree(N);
vector<vector<pair<int,int> > > graf(N);
vector<int> visited[N];
vector<vector<int> > sol;
stack<int> stk;
vector<int> vis(N);
vector<int> indx(N);
void solve(int tr)
{
    vis[tr]++;
    stk.push(tr);
    if(vis[tr]==2)
    {
        vector<int> t;
        t.pb(tr);
        vis[tr]--;
        stk.pop();
        while(stk.top()!=tr)
        {
            t.pb(stk.top());
            vis[stk.top()]--;
            stk.pop();
        }
        t.pb(stk.top());
        sol.pb(t);
    }
    for(int i=indx[tr];i<graf[tr].size();i++)
    {
        indx[tr]++;
        if(!visited[tr][i])
        {
            int p=graf[tr][i].first;
            int j=graf[tr][i].second;
            visited[tr][i]=1;
            visited[p][j]=1;
            degree[tr]--;
            degree[p]--;
            solve(p);
            return;
        }
    }
}
void fastscan(int &number)
{
    register int c;
    number = 0;
    c = getchar();
    for (; (c>47 && c<58); c=getchar())
        number = number *10 + c - 48;
}
int main()
{
    int t=clock();
    int n,m;
    scanf("%i %i",&n,&m);
    /*fastscan(n);
    fastscan(m);*/
    for(int i=0;i<m;i++)
    {
        int a,b,s,t;
        /*fastscan(a);
        fastscan(b);
        fastscan(s);
        fastscan(t);*/
        scanf("%i %i %i %i",&a,&b,&s,&t);
        if(s!=t)
        {
            graf[a].pb({b,graf[b].size()});
            graf[b].pb({a,graf[a].size()-1});
            visited[a].pb(0);
            visited[b].pb(0);
            degree[a]++;
            degree[b]++;
            //printf("Dodajem iz %i u %i\n",a,b);
        }
    }
    for(int i=1;i<=n;i++)
    {
        if(degree[i]%2==1)
        {
            printf("NIE\n");
            return 0;
        }
    }
    for(int i=1;i<=n;i++)
    {
        while(degree[i]!=0)
        {
            while(stk.size())
                stk.pop();
            solve(i);
            vis[i]--;
        }
    }
    printf("%d\n",sol.size());
    for(auto p:sol)
    {
        printf("%d ",p.size()-1);
        for(auto d:p)
        {
            printf("%d ",d);
        }
        printf("\n");
    }
    return 0;
}

Compilation message (stderr)

smi.cpp: In function 'void solve(int)':
smi.cpp:34:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=indx[tr];i<graf[tr].size();i++)
                        ~^~~~~~~~~~~~~~~~
smi.cpp: In function 'int main()':
smi.cpp:102:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<std::vector<int> >::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n",sol.size());
                   ~~~~~~~~~~^
smi.cpp:105:32: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
         printf("%d ",p.size()-1);
                      ~~~~~~~~~~^
smi.cpp:60:9: warning: unused variable 't' [-Wunused-variable]
     int t=clock();
         ^
smi.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i %i",&n,&m);
     ~~~~~^~~~~~~~~~~~~~~
smi.cpp:72:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i %i %i %i",&a,&b,&s,&t);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10