HDU - 1556 Color the ball 区间更新

简单区间更新的小技巧

#include<cstdio>
#include<cstring>
int n,a[100007];
int main() {
while(scanf("%d",&n) != EOF && n) {
memset(a,0,sizeof(a));
int x, y;
for(int i = 1; i <= n; i++) {
scanf("%d %d", &x, &y);
a[x]++;
a[y+1]--;
}
int ans = 0;
for(int i = 1; i < n; i++) {
ans += a[i];
printf("%d ", ans);
}
printf("%d\n", ans+a
);
}
return 0;
}