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Cod sursa(job #127884)
#include<iostream.h>
#include<math.h>
#include<fstream.h>
ifstream fin("stergeri.in");
ofstream fout("stergeri.out");
long sol,ind[100][2],n,i,x,y,v[100],m,k,j;
int main()
{
fin>>n>>m>>k;
for(i=1;i<=m;i++)
for(j=1;j<=2;j++)
fin>>ind[i][j];
for(i=1;i<=n;i++)
v[i]=i;
sol=k;
for(i=1;i<=m;i++)
sol=sol+(abs(ind[m][2]-ind[m][1]))+1;
fout<<sol-1<<endl;
fin.close();
fout.close();
return 0;
}