【NOIP2017提升组 day1】小凯的疑惑

题目

题解

–emmm怎么说呢，毕竟是第一题，固然是打表咯哈哈哈哈哈
算出来答案是(a*b)-(a+b)
虽然不会证
能AC就行不是吗ios

代码

#include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> using namespace std; const int MAXN=1; long long a,b; int main(){ // freopen("math.in","r",stdin); // freopen("math.out","w",stdout); cin>>a>>b; cout<<a*b-(a+b); return 0; } #include<iostream> #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<algorithm> using namespace std; const int MAXN=1; long long a,b; int main(){ // freopen("math.in","r",stdin); // freopen("math.out","w",stdout); cin>>a>>b; cout<<a*b-(a+b); return 0; }