Compilare: main.cpp: In function 'int main()': main.cpp:137:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&p); ^ main.cpp:138:26: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (s , 400 , fin); ^ main.cpp:128:25: warning: iteration 50004 invokes undefined behavior [-Waggressive-loop-optimizations] return (1LL * fact[x] * ridput(( 1LL * fact[y] * fact[x - y] )%MOD , MOD - 2))%MOD; ~~~~~~^ main.cpp:167:20: note: within this loop for (i = 1 ; i <= 100000 ; i++){ ~~^~~~~~~~~