标签：des style blog http color io os ar java
1012
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 2407 Accepted Submission(s): 936
这个大水题居然wa一次
1 #include <iostream> 2 #include <cstdio> 3 #include <cstring> 4 using namespace std; 5 6 const int maxn = 105; 7 8 int main() { 9 int t; 10 scanf("%d",&t); 11 for(int kase = 1; kase <= t; kase++) { 12 int a, b; 13 scanf("%d %d",&a, &b); 14 long long sum = 0; 15 for(int i = a; i <= b; i++) { 16 sum += i * i * i; 17 } 18 printf("Case #%d: %I64d\n", kase, sum); 19 } 20 return 0; 21 }
wa的原因是对强制类型转换的不熟悉， 对于第16行i*i*i仍然是个int型但是不能自动转换为long long
所以只要加一个强转就可以了-。-
代码：
1 #include <iostream> 2 #include <cstdio> 3 #include <cstring> 4 using namespace std; 5 6 const int maxn = 1005; 7 8 int main() { 9 int t; 10 int a, b; 11 scanf("%d",&t); 12 for(int kase = 1; kase <= t; kase++) { 13 scanf("%d %d",&a, &b); 14 long long sum = 0; 15 for(int i = a; i <= b; i++) { 16 sum += (long long ) i * i * i; 17 } 18 printf("Case #%d: %I64d\n", kase, sum); 19 } 20 return 0; 21 }
2014 ACM/ICPC Asia Regional Shanghai Online
标签：des style blog http color io os ar java
原文地址：http://www.cnblogs.com/zhanzhao/p/4003031.html
