foo.cc: In function 'void dfs(int, int, int)':
foo.cc:26:11: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
26 | if (a[1]==a[2]==a[3]==a[4]==a[5]==0) ans=min(ans,c);
| ~~~~^~~~~~
foo.cc:26:17: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
26 | if (a[1]==a[2]==a[3]==a[4]==a[5]==0) ans=min(ans,c);
| ~~~~~~~~~~^~~~~~
foo.cc:26:23: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
26 | if (a[1]==a[2]==a[3]==a[4]==a[5]==0) ans=min(ans,c);
| ~~~~~~~~~~~~~~~~^~~~~~
foo.cc:26:29: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
26 | if (a[1]==a[2]==a[3]==a[4]==a[5]==0) ans=min(ans,c);
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~
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