Submission #288568

#	Time	Username	Problem	Language	Result	Execution time	Memory
288568		MasterTaster	Quality Of Living (IOI10_quality)	C++14	Compilation error	0 ms	0 KiB

quality

#include<bits/stdc++.h>
#include <stdio.h>
#include <stdlib.h>
//#include "quality.h"

using namespace std;

#define ll long long
#define pb push_back
#define pii pair<int, int>
#define xx first
#define yy second
#define endl "\n"
#define MAXN 9000000

static int R,C,H,W,Q[3001][3001],i,j,ans;
int pref[3010][3010], q[3010][3010], pom[3010][3010];
//int bit[310];
int pola;

/*pair<int, int> pos[90010];

ll sum(int x)
{
    ll ret=0;
    while (x)
    {
        ret+=bit[x];
        x-=x&(-x);
    }
    return ret;
}
void upd(int x, int val)
{
    while (x<MAXN)
    {
        bit[x]+=val;
        x+=x&(-x);
    }
    return;
}*/

bool check(int med)
{
    for (int i=0; i<R; i++)
    {
        for (int j=0; j<C; j++)
        {
            pref[i][j]=0;
            pom[i][j]=(q[i][j]<=med) ? 1 : 0;
            ///cout<<pom[i][j]<<" ";
        }
        ///cout<<endl;
    }

    ///cout<<endl;
    for (int i=0; i<R; i++)
    {
        for (int j=0; j<C; j++)
        {
            pref[i][j]=pom[i][j];
            if (i>0) pref[i][j]+=pref[i-1][j];
            if (j>0) pref[i][j]+=pref[i][j-1];
            if (i>0 && j>0) pref[i][j]-=pref[i-1][j-1];
            ///cout<<pref[i][j]<<" ";
        }
        ///cout<<endl;
    }

    for (int i=H-1; i<R; i++)
    {
        for (int j=W-1; j<C; j++)
        {
            int koliko=pref[i][j];
            if (i>=H) koliko-=pref[i-H][j];
            if (j>=W) koliko-=pref[i][j-W];
            if (i>=H && j>=W) koliko+=pref[i-H][j-W];
            if (koliko>=pola) { /*cout<<med<<" "<<i<<" "<<j<<" "<<koliko<<endl;*/ return true; }
        }
    }
    return false;
}

int rectangle(int R, int C, int H, int W, int Q[3001][3001])
{
    pola=H*W/2+1;
    for (int i=0; i<R; i++) for (int j=0; j<C; j++) q[i][j]=Q[i][j];

    int l=1, r=R*C;
    ll ress=-1;
    while (l<=r)
    {
        int mid=l+(r-l)/2;
        ///cout<<mid<<":"<<endl<<endl<<endl;
        if (check(mid))
        {
            ress=mid;
            r=mid-1;
        }
        else l=mid+1;
    }
    return ress;
    /*int ress=R*C+1;

    int koji=H*W/2+1;
    for (int i=0; i<R; i++) for (int j=0; j<C; j++) pos[Q[i][j]]={i, j};

    for (int i=0; i<=R-H; i++)
    {
        for (int k=i; k<i+H; k++)
            for (int j=0; j<W; j++)
                { cout<<Q[k][j]<<" "; upd(Q[k][j], 1); }
        cout<<endl;
        for (int j=0; j<=C-W; j++)
        {
            int l=1, r=R*C;
            int trRess=1000000000;
            while (l<=r)
            {
                int mid=l+(r-l)/2;
                if (sum(mid)>=koji)
                {
                    trRess=mid;
                    r=mid-1;
                }
                else l=mid+1;
            }
            cout<<"ee "<<trRess<<endl;
            ress=min(trRess, ress);

            for (int k=i; k<i+H; k++)
            {
                upd(Q[k][j], -1);
                if (j+W<C) upd(Q[k][j+W], 1);
            }
        }
    }

    return ress;*/
	//return 1;
}

int main(){
   scanf("%d%d%d%d",&R,&C,&H,&W);
   for (i=0;i<R;i++) for (j=0;j<C;j++) scanf("%d",&Q[i][j]);
   ans = rectangle(R,C,H,W,Q);
   printf("%d\n",ans);
   return 0;
}
/*for (int j=0; j<=C-W; j++)
        {
            int koliko=0;
            for (int k=1; k<=R*C; k++)
            {
                if (pos[k].xx>=i && pos[k].xx<i+H && pos[k].yy>=j && pos[k].yy<j+W) koliko++;
                if (koliko==koji)
                {
                    //cout<<i<<" "<<j<<" "<<k<<endl;
                    ress=min(ress, k);
                    break;
                }
            }

            vector<int> koji;
            for (int x=i; x<i+H; x++)
            {
                for (int y=j; y<j+W; y++)
                    koji.pb(Q[x][y]);
            }
            sort(koji.begin(), koji.end());

            //cout<<i<<" "<<j<<" "<<koji[koji.size()/2]<<endl;
            ress=min(ress, koji[koji.size()/2]);
        }*/

Compilation message (stderr)

quality.cpp: In function 'int main()':
quality.cpp:144:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  144 |    scanf("%d%d%d%d",&R,&C,&H,&W);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
quality.cpp:145:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  145 |    for (i=0;i<R;i++) for (j=0;j<C;j++) scanf("%d",&Q[i][j]);
      |                                        ~~~~~^~~~~~~~~~~~~~~
/tmp/ccwfHoEV.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccHQEF10.o:quality.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status