Compilare: main.cpp: In function 'void solveMap()': main.cpp:137:50: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<std::pair<int, char> >::size_type {aka long unsigned int}' [-Wformat=] fprintf(out, "%d %d\n", sol.size() + 1, first.y) ; ^ main.cpp:121:13: warning: unused variable 'val' [-Wunused-variable] int n, m, val ; ^~~ main.cpp: In function 'void solveMat()': main.cpp:63:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &coords) ; ^ main.cpp:65:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %c\n", &cell, &dir) ; ^ main.cpp: In function 'void solveMap()': main.cpp:122:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &m) ; ^ main.cpp:129:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &casa[i][j]) ; ^ main.cpp: In function 'int main()': main.cpp:145:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &query) ; ^