2014-11-01 15:04:00
总结：
A：英语阅读理解题。
1 /************************************************************************* 2 > File Name: a.cpp 3 > Author: Nature 4 > Mail: 564374850@qq.com 5 > Created Time: Thu 30 Oct 2014 02:01:09 PM CST 6 ************************************************************************/ 7 8 #include <cstdio> 9 #include <cstring> 10 #include <cstdlib> 11 #include <cmath> 12 #include <vector> 13 #include <map> 14 #include <set> 15 #include <stack> 16 #include <queue> 17 #include <iostream> 18 #include <algorithm> 19 using namespace std; 20 #define lp (p << 1) 21 #define rp (p << 1|1) 22 #define getmid(l,r) (l + (r - l) / 2) 23 #define MP(a,b) make_pair(a,b) 24 typedef long long ll; 25 const int INF = 1 << 30; 26 27 int n,k; 28 29 int main(){ 30 int a,b,sum = 0; 31 scanf("%d%d",&n,&k); 32 for(int i = 1; i <= n; ++i){ 33 scanf("%d%d",&a,&b); 34 sum += b - a + 1; 35 } 36 if(sum % k == 0) printf("0\n"); 37 else printf("%d\n",k - sum % k); 38 return 0; 39 }