Compilare: user.cpp: In function ‘bool cmp(P, P)’: user.cpp:18:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:29:41: warning: narrowing conversion of ‘i’ from ‘int’ to ‘unsigned int’ inside { } [-Wnarrowing] else nor.push_back({x, 1, i}); ^ user.cpp:31:37: warning: narrowing conversion of ‘i’ from ‘int’ to ‘unsigned int’ inside { } [-Wnarrowing] else nor.push_back({x, 1, i}); ^ user.cpp:34:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < nor.size(); i++) { ^ user.cpp:38:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = i+1; j < nor.size(); j++) { ^ user.cpp:48:23: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long unsigned int’ [-Wformat=] fprintf(g, "%d", s); ^ user.cpp:23:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d\n", &n, &l, &u); ^ user.cpp:25:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &x); ^