Compilare: user.cpp: In function ‘int main()’: user.cpp:47:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase.in", "rt", stdin); ^ user.cpp:48:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase.out", "wt", stdout); ^ user.cpp:49:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&N,&K); ^ user.cpp:53:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",x+i); ^ user.cpp: In function ‘int findIndex(int*, int, int, int)’: user.cpp:25:12: warning: ‘bestIdx’ may be used uninitialized in this function [-Wmaybe-uninitialized] return bestIdx; ^ user.cpp: In function ‘bool findSolution(int*, int, int, int, int&)’: user.cpp:37:41: warning: ‘bestIdx’ may be used uninitialized in this function [-Wmaybe-uninitialized] i = 1 + findIndex(x, N, j, dMax); ^ user.cpp:9:20: warning: ‘bestIdx’ may be used uninitialized in this function [-Wmaybe-uninitialized] int val = x[idx]; ^ user.cpp:8:22: note: ‘bestIdx’ was declared here int lo, hi, mid, bestIdx; ^