新手，觉得难

错的好离谱

#include<iostream>
#include<cmath>
using namespace std;

int mdd[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

int main(){
    int y, m, d;
    int t;
    cin >> t;
    int k, x;
    for(int i = 1; i <= t; i++){
        cin >> k >> t;
        if(k == 1){//k == 1
            d += t;
            if(m == 2 && y % 400 == 0 || y % 100 != 0 && y % 4 == 0) mdd[2] = 29;
            else mdd[2] = 28;
            if(d > mdd[m]){
                d -= mdd[m];
                m++;
                if(m > 12){
                    m -= 12;
                    y++;
                }
            }
        }//k == 1
        else{
            d -= t;
            if(d < 1){
                if(m == 2 && y % 400 == 0 || y % 100 != 0 && y % 4 == 0) mdd[2] = 29;
                else mdd[2] = 28;
                d += mdd[m] - abs(d);
                m--;
                if(m < 1){
                    y--;
                    m += 12 - abs(m);
                }
            }//k == 2
        }
    }
    cout << y << ' ' << m << ' ' << y;
    return 0; 
}