Compilare: user.cpp: In function ‘int main()’: user.cpp:82:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &k, &q); ^ user.cpp:85:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m[i][j]); ^ user.cpp:87:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &poz[i], &o[i]); ^ user.cpp:92:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &r[i]); ^ user.cpp: In function ‘void solve()’: user.cpp:66:23: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] ans[h].j=l+1; ^ user.cpp:22:19: warning: ‘next’ may be used uninitialized in this function [-Wmaybe-uninitialized] ans[h].j=y+1; ^ user.cpp:36:18: note: ‘next’ was declared here int i, j, p, next, l; ^