#include <stdio.h>
int main() {
int max = 0;
int compared = 0;
scanf("%d", &max);
while (scanf("%d", &compared) != EOF) {
if (compared > max) {
max = compared;
}
}
printf("%d", max);
return 0;
}

#include <stdio.h>
int main() {
int max = 0;
int compared = 0;
scanf("%d", &max);
while (scanf("%d", &compared) != EOF) {
if (compared > max) {
max = compared;
}
}
printf("%d", max);
return 0;
}