#include <iostream>
int main() {
int N;
std::cout << "Ingrese el valor de N: ";
std::cin >> N;
if (N <= 0) {
std::cout << "El valor de N debe ser un número entero positivo." << std::endl;
return 1;
}
for (int i = 1; i <= N; ++i) {
int sumaAcumulativa = 0;
for (int j = 1; j <= i; ++j) {
sumaAcumulativa += j;
if (j > 1) std::cout << " + ";
std::cout << j;
}
std::cout << " = " << sumaAcumulativa << std::endl;
}
return 0;
}
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