Compilare: user.cpp: In constructor ‘range_minimum_query::range_minimum_query(const std::vector<short int>&)’: user.cpp:30:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<block.size();i++) ^ user.cpp:31:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] block[i][j]=min(block[i][j-1],block[i+(i+(1<<(j-1))<block.size()?(1<<(j-1)):0)][j-1]); ^ user.cpp:34:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<block.size();i++){ ^ user.cpp: In function ‘int cauta_binar(int, int, int)’: user.cpp:182:9: warning: unused variable ‘st’ [-Wunused-variable] int st = 1, dr = lgMax; ^ user.cpp:182:17: warning: unused variable ‘dr’ [-Wunused-variable] int st = 1, dr = lgMax; ^ user.cpp: In function ‘int numara(int, int)’: user.cpp:207:9: warning: unused variable ‘sol’ [-Wunused-variable] int sol = 0; ^ user.cpp: In function ‘int main()’: user.cpp:236:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.in", "r", stdin); ^ user.cpp:237:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.out", "w", stdout); ^ user.cpp:239:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &N); ^ user.cpp:240:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( str, 1, Nmax * Nmax, stdin ); ^