Compilare: main.cpp: In function 'int main()': main.cpp:19:34: 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:22:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[i] ); ^ main.cpp:31:20: warning: iteration 31620 invokes undefined behavior [-Waggressive-loop-optimizations] if ( ciur[j] == 0 ) { ~~~~~~^ main.cpp:30:20: note: within this loop for ( j = 2; j <= MAXX; j++ ) { ^ main.cpp:26:20: warning: iteration 31620 invokes undefined behavior [-Waggressive-loop-optimizations] if ( ciur[i] == 0 && i * i <= MAXX ) { ~~~~~~^ main.cpp:25:20: note: within this loop for ( i = 2; i <= MAXX; i++ ) { ^