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#include <iostream>
using namespace std;
int main() {
int size;
int sides, parts, length;
int totalPieces, rest, remainingSize;
int imposibleFlag;
cin >> size; // Primera lectura del tamaƱo fuera del bucle para primera comprobaciĆ³n
while (size != -1) {
totalPieces = 1;
rest = 0;
cin >> sides;
imposibleFlag = 0;
remainingSize = size;
while (sides != -1) {
cin >> parts;
cin >> length;
if (length > size && !imposibleFlag) {
cout<<"IMPOSIBLE\n";
imposibleFlag = 1;
}
else {
for (int i = 0; i < sides * parts; i++ ) {
if (remainingSize >= length)
remainingSize -= length;
else {
rest += remainingSize;
cout<<"Added "<<remainingSize<<" to rest.\n";
remainingSize = size;
totalPieces++;
}
}
}
cin >> sides;
}
if (remainingSize == size)
totalPieces--;
if (!imposibleFlag)
cout<<totalPieces<<" "<<rest<<endl;
cin >> size;
}
}
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