Language: C

#include <stdio.h>

int main(void)
{
	int a;
	int b;
	int i;
	int leap;
	scanf("%d%d", &a, &b);
	while(a != 0 && b != 0){
		leap = 1;
		for (i = a; i <= b; i++){
			if (i % 400 == 0){
				printf("%d\n", i);
				leap = 0;
			}
			else if((i % 4 == 0) && (i % 100 != 0)){
				printf("%d\n", i);
				leap = 0;
			}
		}
		if(leap != 0){
			printf("NA\n");
ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　}
		scanf("%d%d", &a, &b);
	}
	return (0);
}

Compiler output:
main.c: In function 'main':
main.c:24:3: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |         ^~~~~~~~
main.c:24:1: error: unknown type name '\U000030c4'
   24 | ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　}
      | ^~
main.c:24:7: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                         ^~~~~~~~
main.c:24:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '\U000030c4'
   24 | ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　ツ　}
      |         ^~
main.c:24:11: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                         ^~~~~~~~
main.c:24:15: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                         ^~~~~~~~
main.c:24:19: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                                         ^~~~~~~~
main.c:24:23: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                                                         ^~~~~~~~
main.c:24:27: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                                                                         ^~~~~~~~
main.c:24:31: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                                                                                         ^~~~~~~~
main.c:24:35: error: stray '\343' in program
   24 | <U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000><U+30C4><U+3000>}
      |                                                                                                                                         ^~~~~~~~
main.c:28:1: error: expected declaration or statement at end of input
   28 | }
      | ^