Compilare: main.cpp: In function 'int main()': main.cpp:83:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < eu.size() ; i++ ) { ~~^~~~~~~~~~~ main.cpp:88:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < eu.size() ; i++ ) ~~^~~~~~~~~~~ main.cpp:73:28: warning: unused variable 'k' [-Wunused-variable] int n, i, tata, m, a, b, k ; ^ main.cpp:74:33: 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:76:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &tata ) ; ^ main.cpp:96:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &a, &b ) ; ^