gather.cpp

[gouthamdeepak1705]

#include
#include
#include
#include
#include
#include
#include // For rand() and srand()

using namespace std;

void parsec_roi_begin()
{
// Start of Region of Interest
}

void parsec_roi_end()
{
// End of Region of Interest
}

struct Result {
vector< vector > A;
};

Result read(string filename) {
vector< vector > A;
Result ab;
string line;
ifstream infile;
infile.open(filename.c_str());

int i = 0;
while (getline(infile, line) && !line.empty()) {
    istringstream iss(line);
    A.resize(A.size() + 1);
    int a, j = 0;
    while (iss >> a) {
        A[i].push_back(a);
        j++;
    }
    i++;
}

infile.close();
ab.A = A;
return ab;

}

vector gather(const vector< vector >& A) {
int n = A.size();
vector gathered_values; // To store gathered values

// Generate 1,000 random indices and gather the elements from those indices
for (int i = 0; i < 1000; i++) {
    int row = rand() % n;   // Random row index
    int col = rand() % n;   // Random column index

    // Gather the value from the matrix and store it in the result vector
    gathered_values.push_back(A[row][col]);
}

return gathered_values;

}

int main(int argc, char* argv[]) {
srand(time(0)); // Seed the random number generator
string filename;
if (argc < 3) {
filename = "2000.in";
} else {
filename = argv[2];
}
Result result = read(filename);
parsec_roi_begin();
vector gathered = gather(result.A); // Gather operation
parsec_roi_end();

// Optional: Print gathered values (for debugging or verification)
for (int value : gathered) {
    cout << value << " ";
}
cout << endl;

return 0;

}