供参考:
#include <stdio.h>
#include <string.h>
int b[1005];
int main()
{
int n;
scanf("%d", &n);
int x, y, z;
char a[5];
int sum = 0, s = 0;
memset(b, -1, sizeof(b));
while (n--) {
while (1) {
scanf("%d %s %d:%d", &x, a, &y, &z);
if (x == 0) {
memset(b, -1, sizeof(b));
if (s != 0)
printf("%d %0.0f\n", s, (double)sum / s);
else
printf("0 0\n");
sum = s = 0;
break;
}
else {
if (a[0] == 'S') {
b[x] = y * 60 + z;
}
else if (a[0] == 'E' && b[x] != -1) {
s++;
sum += y * 60 + z - b[x];
b[x] = -1;
}
}
}
}
return 0;
}
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