A.fun1(x, y) { int x, y; double z;z=x+y;return z; }
B.fun1(int x, y){ int z;return z; }
C.double fun1(int x, int y) { z=x+y; return z; }
D.double fun1(int x, int y){ double z;z=x+y; return z; }"
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