for(int i = 0; i <= 100; i++){ 
  for(int j = 0; j <= 100; j++){ 
   for(int k = 0; k <= 100; k++){ 
    if(i + j + k == 100 && 25 * i + 10 * j + k == 300) 
     cout << i << " " << j << " " << k << endl; 
   } 
  } 
}

for(int i = 0; i <= 100; i++){ 
  for(int j = 0; j <= 100; j++){ 
   for(int k = 0; k <= 100; k++){ 
    if(i + j + k == 100 && 20 * i + 10 * j + k == 300) 
     cout << i << " " << j << " " << k << endl; 
   } 
  } 
}

for(int i = 0; i <= 20; i++){ 
  for(int j = 0; j <= 34; j++){ 
   for(int k = 0; k <= 20; k++){ 
    if(i + j + k == 100 && 15 * i + 9 * j + k == 300) 
     cout << i << " " << j << " " << k << endl; 
   } 
  } 
}

for(int i = 0; i <= 100; i++){ 
  for(int j = 0; j <= 100; j++){ 
   for(int k = 0; k <= 100; k++){ 
    if(i + j + k == 100 && 15 * i + 9 * j + k == 300) 
     cout << i << " " << j << " " << k << endl; 
   } 
  } 
}