Submission #1086707

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086707		modwwe	September (APIO24_september)	C++17	100 / 100	150 ms	17100 KiB

september

#pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
//#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while(c<'0'||c>'9')
    {
        c=getchar_unlocked();
    }
    while(c>='0'&&c<='9')
    {
        x=(x<<1)+(x<<3)+c-'0';
        c=getchar_unlocked();
    }
    return x;
}

void phongbeo();
const int inf=1e9;
const int mod2=1e9+9;
const int  mod1=998244353;
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a,b,c;
};
struct id
{
    int a,b,c,d;
};
struct ie
{
    int a,b,c,d,e;

};

int n,m,s1,s2,s4,s3,sf,k,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,s33,dem3,dem4,l,r,mid,l2,r2,center;
int  i,s10,s12;
int kk;
int el=29;
vector<ib> v2;
vector<int> v[100001];
ib a[100001];
void dfs()
{

     for(int x=n;x>=2;--x){
    ib xx= {inf,0};
    for(auto f:v[x])
    {
        if(a[f].b>=a[x].a)
        xx.a=min(xx.a,a[f].a),
        xx.b=max(xx.b,a[f].b);
    }
    if(x!=1)
        if(v[x].size()!=0&&xx.a!=inf)
        {
            if(xx.b>a[x].a)
            {
                xx.a=min(xx.a,a[x].a);
                xx.b=max(xx.b,a[x].b);
                a[x]=xx;
            }
        }
        }
}
bool cmp(ib a,ib b)
{
    if(a.a==b.a) return a.b>b.b;
    return a.a<b.a;
}
int solve(int N, int M, vector<int> F, vector<vector<int>> S)
{
 n=N;
  m=M;
    for(int i=1; i<=n; i++)
    {
        l=F[i-1];
        if(i!=1)
        {
            v[l+1].pb(i);
        }
        a[i]= {inf,0};
    }
    for(int i=1; i<=m; i++)
    {
        for(int j=1; j<=n-1; j++)
            l=S[i-1][j-1],l++,a[l].a=min(a[l].a,j),a[l].b=max(a[l].b,j);
    }
    dfs();
    for(int i=2; i<=n; i++)
    {
        v2.pb(a[i]);
    }
    sort(v2.begin(),v2.end(),cmp);
    s4=0;
    dem=0;


    for(auto x:v2)
    {
        if(x.a>s4)dem++;
        s4=max(s4,x.b);
    }
       for(int i=1;i<=n;i++)
        v[i].clear();
        v2.clear();
return dem;
}
/*
main()
{
     freopen("test.inp","r",stdin);
     freopen("test.ans","w",stdout);
     cin>>n>>m;
         vector<vector<int>> S;
S.resize(m,vector<int>(n));
      vector<int> F;
      for(int i=1;i<=n;i++)
      {
          cin>>l;
           F.pb(l);
      }
       for(int i=0;i<m;i++)
       {
           for(int j=0;j<n;j++ )
            cin>>S[i][j];
       }
       cout<<solve(n,m,F,S);
}
*/

Compilation message (stderr)

september.cpp: In function 'int solve(int, int, std::vector<int>, std::vector<std::vector<int> >)':
september.cpp:131:8: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  131 |        for(int i=1;i<=n;i++)
      |        ^~~
september.cpp:133:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  133 |         v2.clear();
      |         ^~

• Subtask 1: 11 / 11
• Subtask 2: 14 / 14
• Subtask 3: 5 / 5
• Subtask 4: 9 / 9
• Subtask 5: 5 / 5
• Subtask 6: 11 / 11
• Subtask 7: 9 / 9
• Subtask 8: 11 / 11
• Subtask 9: 9 / 9
• Subtask 10: 16 / 16