#include iostream#include iomanip#include cmathusing namespace std;int main(){int a;cina;int g=a%10;int s=a/10%10;int b=a/100;coutg*100+s*10+b;return 0;}
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#include iostream#include iomanipusing namespace std;int main(){int x,y;cinxy;int z=x*87+y*85;coutfixedsetprecision(4)1.0*z/(x+y);return 0;}
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#include iostream#include iomanipusing namespace std;int main(){float z=6*9.6;float zg=z-5*9.4;float zd=z-5*9.8;float p=(z-zg-zd)/4;coutsetw(5)fixedsetprecision(2)p;//printf("%5.2f",p);//cout" 9.60";return 0;}
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#include iostream#include iomanip#include cmathusing namespace std;int main(){double a,b,c;cinabc;double p=(a+b+c)/2;double s=sqrt(p*(p-a)*(p-b)*(p-c));coutfixedsetprecision(3)s;return 0;}
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#include iostream#include iomanip#include cmathusing namespace std;int main(){double a,b;cinab;int k=a/b;couta-b*k;return 0;}
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#include iostream#include iomanipusing namespace std;int main(){double r;cinr;double v=4.0/3*3.14*r*r*r;coutfixedsetprecision(2)v;return 0;}
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#include iostream#include iomanip#include cmathusing namespace std;int main(){int a;cina;int g=a%10;int s=a%100/10;int b=a/100;coutgsb;return 0;}
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#include iostream#include iomanipusing namespace std;int main(){double h,r;cinhr;double v=3.1415926*r*r*h/1000;int b=20/v;if(20/v==b) coutb;else coutb+1;return 0;}
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#include iostream#include iomanip#include cmathusing namespace std;int main(){double xa,xb,ya,yb;cinxayaxbyb;double zjb1=xa-xb;double zjb2=ya-yb;double ab=sqrt(zjb1*zjb1+zjb2*zjb2);coutfixedsetprecision(3)ab;return 0;}
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#include iostream#include iomanip#include cmathusing namespace std;int main(){double x1,x2,x3,y1,y2,y3;cinx1y1x2y2x3y3;double a=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));double b=sqrt((x1-x3)*(x1-x3)+(y1-y3)*(y1-y3));double c=sqrt((x3-x2)*(x3-x
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