Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:72:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &citys) ; ^ main.cpp:74:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &x, &y) ; ^ main.cpp: In function 'int main()': main.cpp:120:51: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n%d %d\n%d", &query, &x, &y, &t) ; ^