Compilare: main.cpp: In function 'int main()': main.cpp:20:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &t ); ^ main.cpp:37:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &x, &y ); ^ main.cpp:28:19: warning: iteration 10048 invokes undefined behavior [-Waggressive-loop-optimizations] if( ciur[i] == 0 ){ ~~~~~~^ main.cpp:27:19: note: within this loop for( i = 2; i <= N; i++ ){ ~~^~~~