Compilare: main.cpp: In function 'int main()': main.cpp:96:7: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] f2>>s+1; ~^~ main.cpp:115:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%c %c\n", &a, &b); ^ main.cpp: In function 'void print()': main.cpp:79:17: warning: iteration 749 invokes undefined behavior [-Waggressive-loop-optimizations] while (f[i][j] > 0) ~~~~~~^ main.cpp:78:17: note: within this loop for (j = 1; j <= 750; j ++) ~~^~~~~~