/* //1496 阶乘的和 #include<iostream> #include<cstdio> #include<cstring> #include<cmath> using namespace std; long long use(long long n){ int s=1; for(int i=1;i<=n;i++){ s*=i; } return s; } int main(){ int zoom=0,n=0; cin>>n; for(int i=1;i<=n;i++){ zoom+=use(i); } cout<<zoom; return 0; }*/ //1497 闰年的数量 #include<iostream> #include<cstdio> #include<cstring> #include<cmath> using namespace std; int use(int x,int y){ int s=0; for(int i=x;i<=y;i++){ if(i%4==0 && i%100!=0 || i%400==0){ s++; } } return s; } int main(){ int s=0,x,y; cin>>x>>y; cout<<use(x,y); return 0; }