#include <stdio.h>
#include <stdlib.h>

typedef struct {
    int start;
    int end;
} range;

int max_range(range*, int ,int);

int main(){
    int i;
    range array[5];
    for(i = 0; i< 5; i++){
        printf("range %d\n", i);
        scanf(" %d", &array[i].start);
        printf("range %d\n", i);
        scanf(" %d", &array[i].end);
    }
    printf("index = %d\n", max_range(array, 2, 5));
    return 0;
}

int max_range(range* array, int value, int lenght){
    int i, j, range_lenght, flag, k, max;
    int *range_array;
    range_array = (int *)malloc(sizeof(int));
    flag = 0;
    k = 0;
    for (i = 0; i < lenght; i++){
        range_lenght = 0;
        for (j = array[i].start; j <= array[i].end; j++){
            range_lenght++;
            if (j == value){
                flag = 1;
            }
        }
        if (flag == 1){
            flag = 0;
            range_array[k] = range_lenght;
            k++;
            range_array = (int*)realloc(range_array, sizeof(range_array) + sizeof(int));
        }
    }
    max = 0;
    for(i = 0; i < k; i++){
        if (range_array[i] > max)
            max = i;
    }
    return max;

}