Compilare: main.cpp: In function 'int main()': main.cpp:36:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &s ); ^ main.cpp:38:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[i] ); ^ main.cpp:61:145: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf( fout, "%d %d %d %d %d %d", v[i - 1], v[j - 1], v[k - 1], myHash[(s - sum) % MOD][p].a, myHash[(s - sum) % MOD][p].b, myHash[(s - sum) % MOD][p].c ); ~~~^~~~~~