Compilare: main.cpp: In function 'int main()': main.cpp:122:16: warning: unused variable 'j' [-Wunused-variable] int n, m, i, j, x; ^ main.cpp:120:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("network.in", "r", stdin); ^ main.cpp:121:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("network.out", "w", stdout); ^ main.cpp:123:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:126:65: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf%lf", &x, &nd[dr], &prob[dr][0], &prob[dr][1]); ^