4、for (a=1,b=1;a=20) break;

4、for (a=1,b=1;a=20) break; {int a,b; for(a=1,b=1;a=20) break; if(b%3==1) {b+=3; continu main( ){int a,b;for(a=1,b=1;a=20)break;if(b%3==1){b+=3;conti for (a=1,b=1;a=20) break; if(b%3==1) {b+=3; continue;} b-=5; for (a=1,b=1;a=20) break;if(b%3==1){b+=3; continue;}b-=5; ：for(a=1,b=1;a=20) break; if(b%3==1) {b+=3; continue; int a,b; for(a=1,b=1;a=10) break; if(b%3==1) {b+=3;continue; switch(a*a+b*b); { case 3 :case 1 :y=a+b; break; case 0 :y=b have a rest=have a break int a,b; for(a=1;a Are you break for a break for(m=1;m=200) break; } cout