Compilare: main.cpp: In function 'int main()': main.cpp:61:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("traseu4.in", "r", stdin); ^ main.cpp:62:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("traseu4.out", "w", stdout); ^ main.cpp:64:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ main.cpp:68:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m[i][j]); ^ main.cpp: In function 'int gasesteTraseeValide(int, int)': main.cpp:57:12: warning: 'Zactual' may be used uninitialized in this function [-Wmaybe-uninitialized] return Zactual; ^~~~~~~ main.cpp: In function 'int main()': main.cpp:76:13: warning: 'Zactual' may be used uninitialized in this function [-Wmaybe-uninitialized] if(Z < temp) { ^~