Compilare: main.cpp: In function 'int main()': main.cpp:39:9: warning: unused variable 'n' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^ main.cpp:39:12: warning: unused variable 'i' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^ main.cpp:39:15: warning: unused variable 'x' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^ main.cpp:39:18: warning: unused variable 'a' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^ main.cpp:39:21: warning: unused variable 'val6' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^~~~ main.cpp:39:31: warning: unused variable 'cnt0' [-Wunused-variable] int n, i, x, a, val6 = 0, cnt0 = 0; ^~~~ main.cpp:36:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "calorifer.in", "r", stdin ); ^ main.cpp:37:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "calorifer.out", "w", stdout ); ^