Compilare: main.cpp: In function 'void read()': main.cpp:34:21: warning: narrowing conversion of '(((int)y) + ((int)n))' from 'int' to 'ushort {aka short unsigned int}' inside { } [-Wnarrowing] #define B_NODE(i) (i+n) ~~^~~ main.cpp:44:41: note: in expansion of macro 'B_NODE' G[A_NODE(x)].push_back({.node = B_NODE(y), .flow = 0, .capacity = 1}); ^~~~~~ main.cpp:34:21: warning: narrowing conversion of '(((int)i) + ((int)n))' from 'int' to 'ushort {aka short unsigned int}' inside { } [-Wnarrowing] #define B_NODE(i) (i+n) ~~^~~ main.cpp:60:36: note: in expansion of macro 'B_NODE' G[dest].push_back({.node = B_NODE(i), .flow = 0, .capacity = 0}); ^~~~~~ main.cpp: In function 'int main()': main.cpp:131:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in", "r", stdin); ^ main.cpp:132:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out", "w", stdout); ^