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#include <iostream> #include <string> using namespace std; string func(string a, string b, int n) { int i,j; for (i = 0; i < n; i++) { a += '_'; } for (i = 0; i < n; i++) { cin >> b; for (j = 0; j < n; j++) { if (a[j] == '_') a[j] = b[j]; } } return a; } int main() { setlocale(LC_ALL, "Russian"); string a{}, b; int i, j, n; cin >> n; cout << func(a, b, n); };
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