Compilare: main.cpp: In function 'int main()': main.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciur[a].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<ciur[a].size();j++){ ~^~~~~~~~~~~~~~~ main.cpp:25:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:29:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a); ^