Compilare: main.cpp: In function 'int main()': main.cpp:12:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ main.cpp:18:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ main.cpp:25:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &s); ^ main.cpp:60:19: warning: 'side' may be used uninitialized in this function [-Wmaybe-uninitialized] if(c2<0) fprintf(out, "%lld %c\n%lld %c", c1, side, -c2, side2); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:51:7: warning: 'c2' may be used uninitialized in this function [-Wmaybe-uninitialized] c2+=v[i].first/2; ~~^~~~~~~~~~~~~~ main.cpp:50:7: warning: 'c1' may be used uninitialized in this function [-Wmaybe-uninitialized] c1+=v[i].first/2; ~~^~~~~~~~~~~~~~