Compilare: user.cpp: In function ‘void finish()’: user.cpp:67:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<k; i++) ^ user.cpp: In function ‘void cauta(int, int)’: user.cpp:73:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(level == k) return; ^ user.cpp:74:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=pos+1; i<n; i++) ^ user.cpp:77:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(level+1 == k && i==n-1) ^ user.cpp:77:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(level+1 == k && i==n-1) ^ user.cpp: In function ‘int main()’: user.cpp:92:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<n; i++){ ^ user.cpp:97:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n-k+1; i++){ ^ user.cpp:85:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ksecv3.in","r",stdin); ^ user.cpp:86:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ksecv3.out","w",stdout); ^ user.cpp:90:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:91:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); sums[0] = x; ^ user.cpp:93:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^