#include <stdio.h>
 
void hoge(int n, int m) {
    int sum = 0;
    int start, end;
 
    if (n < m) {
        start = n;
    } else {
        start = m;
    }
 
    if (n > m) {
        end = n;
    } else {
        end = m;
    }
 
    for (int i = start; i <= end; i++) {
        sum += i;
        printf("%d", i);
        if (i < end) {
            printf("+");
        }
    }
 
    printf("=%d", sum);
}
 
int main() {
    hoge(4, 8);
    return 0;
}

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