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- #include <iostream>
- using namespace std;
- //Pre: Llegeix un tauler amb n monedes per casella
- //Post: Obtenim la suma de monedes a caselles blanques
- int main () {
- int a, b, s;
- cin >> a >> b;
- s=0;
- char n;
- for (int i=0; i<a; ++i) {
- for (int j=0; j<b; ++j) {
- cin >> n;
- if (i%2==j%2) s=s+(n-'0');
- }
- }
- cout << s << endl;
- }
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