#includeintmain(){inty,m;scanf("%d%d",&y,&m);if(m==1orm==3orm==5orm==7orm==8orm==10orm==12)printf("31");if(m==4orm==6orm==9orm==11)printf("30");if(m==2){if((y%4==0&&y%100!=0)||y%400==0)printf("29");elseprintf("28");}while(1);return0;}
追问我看不懂啊……我才学
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