Submission #370380

#	Time	Username	Problem	Language	Result	Execution time	Memory
370380		nicolaalexandra	Red-blue table (IZhO19_stones)	C++14	100 / 100	881 ms	9404 KiB

stones

#include <bits/stdc++.h>
#define DIM 1010
using namespace std;

int t,n,m,i,j;
int a[DIM][DIM],aux[DIM][DIM],lin[DIM],col[DIM];
vector <pair<int,int> > v;

int main (){

    //ifstream cin ("date.in");
    //ofstream cout ("date.out");

    cin>>t;
    for (;t--;){
        memset (a,0,sizeof a);
        memset (aux,0,sizeof aux);
        memset (lin,0,sizeof lin);
        memset (col,0,sizeof col);

        cin>>n>>m;

        int swapped = 0;
        if (n > m){
            swap (n,m);
            swapped = 1;
        }

        int sol = m;
        for (i=1;i<=n;i++){
            /// verific daca am suficiente coloane libere ca sa formez o linie buna
            /// nu vreau sa stric coloanele care sunt deja toate ok
            v.clear();
            for (j=1;j<=m;j++){
                if (col[j] + 1 <= (n-1)/2)
                    v.push_back(make_pair(col[j],j));
            }

            if (v.size() <= m/2) /// nu mai am cum sa formez nicio linie
                break;

            sol++;
            /// o sa pun unuri pe coloanele unde am cei mai putini
            sort (v.begin(),v.end());
            for (j=0;j<=m/2;j++){
                int poz = v[j].second;
                col[poz]++;
                lin[i]++;
                a[i][poz] = 1;
            }
        }

        if (swapped){
            for (i=1;i<=n;i++)
                for (j=1;j<=m;j++)
                    aux[m-j+1][i] = a[i][j];

            swap (n,m);
            for (i=1;i<=n;i++)
                for (j=1;j<=m;j++)
                    a[i][j] = 1 - aux[i][j];
        }

        cout<<sol<<"\n";
        for (i=1;i<=n;i++,cout<<"\n")
            for (j=1;j<=m;j++){
                if (a[i][j])
                    cout<<"+";
                else cout<<"-";
            }

    }

    return 0;
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:39:26: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |             if (v.size() <= m/2) /// nu mai am cum sa formez nicio linie
      |                 ~~~~~~~~~^~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31