Submission #315294

#	Time	Username	Problem	Language	Result	Execution time	Memory
315294		juggernaut	Jousting tournament (IOI12_tournament)	C++14	0 / 100	1095 ms	1648 KiB

tournament

#include<bits/stdc++.h>
//#include"grader.cpp"
using namespace std;
int a[5005],N,tree[20005],flag[20005];
void build(int v,int l,int r){
    if(l==r){
        tree[v]=a[l];
        return;
    }
    int mid=(l+r)>>1;
    build(v<<1,l,mid);
    build((v<<1)+1,mid+1,r);
    tree[v]=max(tree[v<<1],tree[(v<<1)+1]);
}
int gt(int v,int l,int r,int ql,int qr){
    if(ql<=l&&r<=qr)return tree[v];
    if(r<ql||qr<l)return int(-2e9);
    int mid=(l+r)>>1;
    return max(gt(v<<1,l,mid,ql,qr),gt((v<<1)+1,mid+1,r,ql,qr));
}
void push(int v,int l,int r){
    if(l!=r){
        flag[v<<1]=max(flag[v<<1],flag[v]);
        flag[(v<<1)+1]=max(flag[(v<<1)+1],flag[v]);
    }
    tree[v]=max(tree[v],flag[v]);
}
void upd(int v,int l,int r,int ql,int qr,int val){
    if(ql<=l&&r<=qr){
        flag[v]=max(flag[v],val);
        return;
    }
    if(r<ql||qr<l)return;
    push(v,l,r);
    int mid=(l+r)>>1;
    upd(v<<1,l,mid,ql,qr,val);
    upd((v<<1)+1,mid+1,r,ql,qr,val);
    tree[v]=max(tree[v<<1],tree[(v<<1)+1]);
}
int GetBestPosition(int n,int C,int R,int *K,int *s,int *e){
    N=n;
    vector<int>S,E,v;
    for(int i=0;i<N;i++)v.push_back(i);
    for(int i=0;i<C;i++){
        S.push_back(v[s[i]]);
        E.push_back(v[e[i]]);
        vector<int>temp;
        for(int j=0;j<v.size();j++)if(!(s[i]<j&&j<=e[i]))temp.push_back(v[j]);
        v.clear();
        v.insert(v.end(),temp.begin(),temp.end());
    }
    int mx=-1,cnt,id;
    for(int pos=0;pos<N;pos++){
        for(int i=0;i<pos;i++)a[i]=K[i];
        a[pos]=R;
        for(int i=pos+1;i<N;i++)a[i]=K[i-1];
        cnt=0;
        build(1,0,N-1);
        for(int i=0;i<C;i++){
            int tmp=gt(1,0,N-1,S[i],E[i]);
            cnt+=(R==tmp);
            upd(1,0,N-1,S[i],E[i],mx);
        }
        if(cnt>mx){
            mx=cnt;
            id=pos;
        }
    }
    return id;
}
/*
5 3 3
1
0
2
4
1 3
0 1
0 1

*/

Compilation message (stderr)

tournament.cpp: In function 'int GetBestPosition(int, int, int, int*, int*, int*)':
tournament.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for(int j=0;j<v.size();j++)if(!(s[i]<j&&j<=e[i]))temp.push_back(v[j]);
      |                     ~^~~~~~~~~
tournament.cpp:69:12: warning: 'id' may be used uninitialized in this function [-Wmaybe-uninitialized]
   69 |     return id;
      |            ^~

• Subtask 1: 0 / 17
• Subtask 2: 0 / 32
• Subtask 3: 0 / 51