#include <stdio.h>

int main() {
    printf("Hello World");
}



=====================================

#include <stdio.h>

int main() {
    printf("Hello World\n");
    printf("Hello Vasya");
}

======================================

#include <stdio.h>

int main() {
    int a = 16;
    printf("My number is %d", a);
}


========================================
#include <stdio.h>

int main() {
    int a = 5;
    int b = 3;
    int c = a + b;
    printf("My number is %d", c);
}

================================


#include <stdio.h>

int main() {
    int a = 5;
    int b = 3;
    int c1 = a + b;
    int c2 = a - b;
    int c3 = a * b;
    int c4 = a / b;
    int c5 = a % b;
    printf("My number is %d %d %d %d", c1, c2, c3, c4);
}


========================================

#include <stdio.h>

int main() {
    int a, b;
    scanf_s("%d%d", &a, &b);
    int c = a + b;
    printf("%d", c);
}

==========================

#include <stdio.h>

int main() {
	long long a, b;
	scanf("%lld%lld", &a, &b);
	printf("%lld", a);
}

============================


#include <stdio.h>

int main() {
	double a;
	scanf("%lf", &a);
	printf("%lf", a);
	//Выведет 2 знака после запятой
	printf("%.2lf", a);
	//Выведет 5 знаков после запятой
	printf("%.5lf", a);
	//Выведет 7 знаков после запятой
	printf("%.7lf", a);
}

=========================