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Cod sursa(job #801884)
#include <cstdio>
const int MAX_N = 500010;
int N, K;
int A[MAX_N], aux[MAX_N];
void interclasare(int p, int q) {
int mij = (p + q) / 2;
int x = p, y = mij + 1;
K = p - 1;
while (x <= mij && y <= q) {
if (A[x] <= A[y]) {
aux[++K] = A[x];
x++;
}
else {
aux[++K] = A[y];
y++;
}
}
while (x <= mij)
aux[++K] = A[x++];
while (y <= q)
aux[++K] = A[y++];
for (int i = p; i <= q; i++)
A[i] = aux[i];
}
void merge(int st, int dr) {
if (st == dr)
return;
int mij = (st + dr) / 2;
merge(st, mij);
merge(mij + 1, dr);
interclasare(st, dr);
}
int main() {
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
scanf("%d", &N);
for (int i = 0; i < N; i++)
scanf("%d", &A[i]);
merge(0, N - 1);
for (int i = 0; i < N; i++)
printf("%d ", A[i]);
printf("\n");
return 0;
}