#include <stdio.h>
#include <mpi.h>
int main(int argc, char **argv) {
    // Initialize MPI
    MPI_Init(&argc, &argv);
    // Get the total number of processes and the rank of the current process
    int world_size, world_rank;
    MPI_Comm_size(MPI_COMM_WORLD, &world_size);
    MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
    // Define the range of numbers to sum
    int N = 100;
    int local_sum = 0;
    int global_sum;
    // Calculate the local sum for each process
    for (int i = world_rank + 1; i <= N; i += world_size) {
        local_sum += i;
    }
 // Perform a global sum using MPI_Reduce
    MPI_Reduce(&local_sum, &global_sum, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
    // Output the result
    if (world_rank == 0) {
        printf("The sum of numbers from 1 to %d is: %d\n", N, global_sum);
    }
    // Finalize MPI
    MPI_Finalize();
    return 0;
}
 
 

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