题解 | #前天是哪天#
前天是哪天
https://ac.nowcoder.com/acm/contest/19304/Q
#include<iostream>
using namespace std;
int main()
{
int a,b,c;
scanf("%4d-%2d-%2d",&a,&b,&c);
int m[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
if(a%4==0&&a%100!=0||a%400==0)m[2]++;
if(c>=3)c-=2;
else if(b!=1)
{
b--;
c=m[b]+c-2;
}
else
{
a--;
b=12;
c=31+c-2;
}printf("%4d-%02d-%02d",a,b,c);
}
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