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Cod sursa(job #18242)
#include<fstream.h>
ifstream f("amlei.in");
ofstream g("amlei.out");
int n,t,u;
int functie()
{int i,j,ok1,ok2,t2,u2,c,ok3;
ok2=0;
for(i=1;i<=t;i++)
{ok1=1;
for(j=1;j<=n;j++)
{f>>c;if(c<0) {ok1=0;break;}
}
if(ok1) {ok2=1;break;}
else {j++;while(j<=n) {f>>c;j++;}
}
}
if(ok2)
{t2=n*t;i=i*n+1;while(i<=t2) {f>>c;i++;}
}
ok3=0;
for(i=1;i<=u;i++)
{ok1=1;
for(j=1;j<=n;j++)
{f>>c;if(c<0) {ok1=0;break;}
}
if(ok1) {ok3=1;break;}
else {j++;while(j<=n) {f>>c;j++;}
}
}
if(ok3)
{u2=u*n;i=i*n+1;while(i<=u2) {f>>c;i++;}
}
return (ok2==ok3);
}
int main()
{
while(f>>n>>t>>u)
{if(functie()) g<<"DA"<<'\n';
else g<<"NU"<<'\n';
}
f.close();
g.close();
return 0;
}