Compilare: main.cpp: In function 'int main()': main.cpp:16:26: warning: variable 'pn' set but not used [-Wunused-but-set-variable] long long pen = 0LL, pn; ^~ main.cpp:19:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:21:48: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &v[i].t, &v[i].p ); ^ main.cpp:30:23: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized] while ( j < n && v[j].t == i ) { ~~~~~~^~~~~~~~~~~~~~ main.cpp:15:15: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized] int n, i, val, m = 0, j; ^~~