Compilare: user.cpp: In function ‘int main()’: user.cpp:55:24: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] best[0] = dp[1 - i & 1][0] = INF; ~~^~~ user.cpp:63:55: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] best[sz] = min(best[sz - 1], min(mn, dp[1 - i & 1][stk[sz - 1]]) + arr[j]); ~~^~~ user.cpp:64:38: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] mn_dp[sz] = min(mn, dp[1 - i & 1][j]); ~~^~~ user.cpp: In function ‘char nextch()’: user.cpp:14:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, MAXBUF, fi); ^