0_0_24927915_840.cpp: In function 'void spfa()':
0_0_24927915_840.cpp:22:33: error: 'memset' was not declared in this scope
memset(vis,false,sizeof(vis));
^
0_0_24927915_840.cpp: In function 'int main()':
0_0_24927915_840.cpp:66:37: error: 'memset' was not declared in this scope
memset(pre,false,sizeof(pre));
^
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