#include <stdio.h>

int main() {
    int i,j;
    for(i=1;i<=3;i++){
        printf("첫번째 반복문: %d\n", i);
        for(j=1;j<=5;j++){
            printf("    두번째 반복문: %d\n", j);
        }
    }

    for(i=1;i<=5;i++){
        for(j=1;j<=5;j++){
            printf("%d",j);
        }
        printf("\n");
    }

    for(i=2;i<=9;i++){
        for(j=1;j<=9;j++){
            printf("%d x %d = %d\n", i, j, i*j);
        }
        printf("\n");        
    }    
    
    return 0;
}

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