#include <cstdio> #include <iostream> #include <string> using namespace std; #define REP(i, n) for (int i = 0; i < (n); ++i) int main(void) { int ans = 0; string s; REP(i, 12) { cin >> s; if (s.find('r') != string::npos) { ans++; } } printf ("%d\n", ans); return 0;</string></iostream></cstdio>…

問題：A - 複数形 #include <cstdio> #include <iostream> #include <string> using namespace std; int main(void) { string w; cin >> w; cout << w << "s\n"; return 0; }</string></iostream></cstdio>