Compilare: main.cpp: In function 'int main()': main.cpp:43:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<s[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:52:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<s[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:15:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:17:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ main.cpp:20:61: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&op[i].x,&op[i].y,&op[i].z); ^