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0_0_26792654_7469.cpp:1:167: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/stdio.h>in: Invalid argument
 #include <stdio.h>int main(){ int m,k; int t,s=0; scanf("%d",&t); while(t--) { scanf("%d%d",&m,&k); printf("Case #%d: %.8lf\n",++s,(double)1/(k+k*m+1)); } return 0;} 
                                                                                                                                                                       ^
compilation terminated.